Dadang Atmaja - Academia.edu (original) (raw)

Papers by Dadang Atmaja

Jurnal Pengabdian UNDIKMA, Aug 19, 2022

The community service about training in using Mendeley application as a citation and reference ma... more The community service about training in using Mendeley application as a citation and reference manager instrument in writing article for university students in Madiun aims to share knowledge for academicians in writing article citation and reference manager using Mendeley. The participants of this community service are the university students in Madiun. This activity was done through discussion and simulation in Zoom meeting. It was started with planning and socialization for a month through social media. The simulation was done through Zoom meeting in a day. Evaluation of this activity was done by giving questionnaire for all participants at the end of the training. The results of the evaluation showed that the training of article citation and reference manager in writing article benefits for the university students in writing appropriate APA 7th edition-citation.

V-MAC (Virtual of Mechanical Engineering Article)

Composite material is a type of new, engineered material consisting of two or more materials wher... more Composite material is a type of new, engineered material consisting of two or more materials where the properties of each material differ from one another both in chemical and physical properties and remain separate in the final material. Composite materials have many advantages, one of which is lighter weight and corrosion resistance. In this study, composites made from glass fiber were carried out with variations in the arrangement of laminates, in order to select the material which was then applied to the manufacture of the inspection lorry body. Composites were made using the hand lay-up method. Tensile test specimens made according to ASTM D-638. The results of the tensile test show that the highest tensile strength of glass fiber composite material for the inspection lorry body is 5.45 MPa and the lowest tensile strength is 4.62 MPa. Keyword: composite, glass fiber, tensile test, inspection lorry

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2018

Tunnel construction in the Jakarta MRT (MRTJ) is a concrete tunnel that was built using the Tunne... more Tunnel construction in the Jakarta MRT (MRTJ) is a concrete tunnel that was built using the Tunnel Boring Machine (TBM) drill machine. Tunnel walls in underground construction use pre-cast (segment) concrete materials arranged in a circle directly into one ring segment by TBM. Tunnel checks are needed to be the basis of diagnosis in tunnel care. Tunnel maintenance is carried out to maintain the condition of the tunnel to function properly and safely to be operated in a sustainable manner in accordance with the predicted load, including: the burden of soil or overburden, dead load and live load, load due to water pressure, earthquake load, and other loads that will affect tunnel construction. The results of the study that damage to the tunnel wall can be classified as leaks and cracks. Examination of components in the MRTJ tunnel wall by paying attention to the detail part of the wall in the form of segment bolts, connections between segments, concrete structures in segments. As for ...

Madiun Spoor (JPM)

Desa Klagenserut adalah desa di kecamatan Jiwan, kabupaten Madiun, Jawa Timur, Indonesia. Mata pe... more Desa Klagenserut adalah desa di kecamatan Jiwan, kabupaten Madiun, Jawa Timur, Indonesia. Mata pencaharian utama masyarakat Desa Klagenserut adalah bertani, berdagang dan wirausaha. Selain itu, warga menciptakan lapangan kerja sendiri yang dibutuhkan oleh warga lain. Sebagian warga membuka sebuah usaha dengan membuka sebuah bengkel las rumahan. Mereka mengerjakan beberapa produk dan menghasilkan sebuah produk seperti pembuatan pagar besi, tralis besi, kanopi, tangga besi, perbaikan mesin pertanian dan sebagainya. Bengkel las tersebut mengerjakan produk tersebut dari material besi hollow, besi plat, besi siku dan juga material stainless steel. Material stainless steel ini di masyarakat dikenal sebagai material yang tahan korosi dan mempunyai nilai estetika lebih bagus dibandingkan material logam lainnya. Namun masyarakat Desa Klagenserut khususnya yang membuka usaha dengan membuka bengkel las rumahan, masih belum memahami betul bagaimana cara yang tepat dalam melakukan proses pemoton...

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2021

Perawatan sistem penambat merupakan upaya dilakukan agar penambat pada rel kereta api tetap dalam... more Perawatan sistem penambat merupakan upaya dilakukan agar penambat pada rel kereta api tetap dalam kondisi yang baik. Memasang dan melepas penambat di Indonesia menggunakan alat manual yaitu palu dan panpuller sehingga membutuhkan waktu yang cukup lama dan kurang efektif, sehingga pengembangan alat ditujukan agar dapat meminimalisir penggunaan tenaga manusia, lebih efektif dan tidak memerlukan banyak waktu untuk memasang dan melepas penambat. Pembuatan alat pemasang dan pelepas penambat berbasis hidrolik ini dilakukan pengembangan alat lama menjadi alat baru. Alat pemasang dan pelepas penambat berbasis hidrolik memiliki panjang 105 cm, lebar 67 cm dan tinggi 91 cm yang mampu meminimalisir penggunaan tenaga manusia dan lebih efektif dalam pemasangan maupun pelepasan penambat. Penggunaan alat tersebut dengan cara menempatkan alat diatas rel dan memposisikan silinder hidrolik di depan penambat, kemudian pompa dengan menggunakan tuas pompa hidrolik hingga penambat dapat terpasang maupun ...

CIVED, 2021

Penelitian yang berjudul analisis faktor-faktor aspek material dan Sumber Daya Manusia (SDM) yang... more Penelitian yang berjudul analisis faktor-faktor aspek material dan Sumber Daya Manusia (SDM) yang terdampak pandemi Covid-19 di proyek satuan kerja Balai Teknik Perkeretaapian (BTP) Jawa Timur ini bertujuan mengetahui faktor-faktor SDM apa saja yang terdampak pandemi Covid-19 di Proyek Satuan Kerja BTP Jawa Timur. Metode analisis data yang digunakan dalam penelitian ini adalah dengan mengunakan analisis statistika dengan analisis faktor . Metode pengumpulan data yang digunakan adalah menggunakan kuisioner dengan jumlah responden sebanyak 30 orang yang merupakan pekerja proyek pada satuan kerja BTP Jawa Timur pada masa pandemi Covid-19 . Pengolahan data dilakukan dengan program SPSS versi 24.0. Aspek yang dianalisis dalam penelitian ini adalah aspek Material dan SDM. Hasil Penelitian menunjukkan bahwa faktor pada aspek SDM yang dominan terdampak pandemi Covid-19 di proyek satuan kerja BTP Jawa Timur adalah ketersediaan tenaga kerja. Sedangkan faktor pada aspek material yang dominan ...

JNANALOKA, 2021

Sistem suspensi merupakan komponen penting dalam kendaraan, karena berfungsi sebagai peredam geta... more Sistem suspensi merupakan komponen penting dalam kendaraan, karena berfungsi sebagai peredam getaran bagi kendaraan ketika dikendarai oleh penggunanya. Ada beberapa jenis sistem suspensi yang diterapkan pada kendaraan. Salah satu komponen yang paling penting dalam meredam getaran adalah karet. Pembuatan suspensi karet dimulai dari perencanaan. Perencanaan ini meliputi proses desain dan pemilihan material. Desain karet menggunakan software autodesc inventor dengan memperhatikan kekuatan karet. Desain lebih menitik beratkan pada kekuatan karet ketika menerima beban. Lori inspeksi dirancang dengan kecepatan operasional 20 Km/jam dan kecepatan maksimum 25 Km/jam. Pemilihan bahan dengan menggunakan beberapa campuran bahan kimia dan karet alam yang dominan untuk menambah kekuatan karet. Pembuatan karet dilakukan di tempat industri karet CV Juwahir Berdikari yang berada di Gorang gareng kabupaten Magetan. Dengan beberapa tahapan proses yang membutuhkan mesin khusus untuk menghasilkan produ...

This study discusses long bridge superstructure planning. The reference used for the design of ... more This study discusses long bridge superstructure planning. The reference used for the design of the bridge is the Regulation of the Minister of Transportation No. 60 of 2012 on Technical Requirements of Railways, AREMA and the rules of the European Union. The loading of the superstructure of the railway bridge includes dead load, live load, shock load, horizontal load, and wind load. This bridge profile needs analysis using the influence line method with SAP 2000 application. The result of superstructure analysis of 100 meter railway bridge type of lower truss frame shows that the size for structure profile, stringer, and cross girder must be specially designed by utilizing SM400 type steel plate with welding. From the analysis result, the working force of stringer is 1618,74 kN with a deflection of 11,58 mm; Force on a transverse girder of 2348.16 kN; Upperchord of 6340.45 kN; Lower Frame (Lowerchord) of 7441.33 kN; And members in the amount of 5599.48...

Composite material is a type of new, engineered material consisting of two or more materials wher... more Composite material is a type of new, engineered material consisting of two or more materials where the properties of each material differ from one another both in chemical and physical properties and remain separate in the final material. Composite materials have many advantages, one of which is lighter weight and corrosion resistance. In this study, composites made from glass fiber were carried out with variations in the arrangement of laminates, in order to select the material which was then applied to the manufacture of the inspection lorry body. Composites were made using the hand lay-up method. Tensile test specimens made according to ASTM D-638. The results of the tensile test show that the highest tensile strength of glass fiber composite material for the inspection lorry body is 5.45 MPa and the lowest tensile strength is 4.62 MPa. Keyword: composite, glass fiber, tensile test, inspection lorry

Locomotive CC 206 is the newest locomotive owned by PT Kereta Api Indonesia. Inside the CC 206 lo... more Locomotive CC 206 is the newest locomotive owned by PT Kereta Api Indonesia. Inside the CC 206 locomotive is equipped with a sophisticated smart display that can monitor all size parameters and damage to the locomotive itself. One of the capabilities of the CC 206 locomotive is the pop test. Pop test is the ability of the CC 206 locomotive to test the performance of each cylinder of the diesel engine. Based on the pop test results, there are various disturbances that often occur during maintenance of the CC 206 locomotive diesel engine.The purpose of this analysis is to analyze the pop test results as a reliability parameter on the CC 206 locomotive diesel engine, to analyze the factors causing the disturbance in the pop test results and analyze the effect of the failure of the pop test results on performance. Based on the results of the pop test, it was found that one of the cylinders was abnormal because the injector was under pressure, the injector spring was damaged and there wa...

The purpose of this study was to analyze the stress, displacement, and factor of safety that occu... more The purpose of this study was to analyze the stress, displacement, and factor of safety that occurred in the valblock safety device. With the maximum load that occurs at the knuckle is 7473 N. Testing is done using Solidworks simulation software. The material used is AISI 1045 with allowable stress of 450 MPa. The results of the analysis that came out of the simulation were the maximum stress values, displacement, and the factor of safety. The maximum stress results in static conditions that the tool is only able to withstand loads up to 7000 N with a value of 3,540 , and does not exceed the maximum allowable stress limit of the tool, which is 5,300 . The result of the loading is a change in the shape of the stem, namely displacement or deflection. The results obtained from the deflection of 1.3 mm. For the results of the factor of safety, the tool is worth 1.5 at a load of 7000 N so that the valblock safety device is safe to use up to 7000 N loading. Key Words: Coupler, Valblock, T...

Indonesian railways, to reduce track maintenance costs and increase passenger comfort, have imple... more Indonesian railways, to reduce track maintenance costs and increase passenger comfort, have implemented continuous welded rail infrastructures. To achieve and maintain their functions, these infrastructures require high weld quality, which can be achieved using suitable welding methods therefore, sustainable rail welding is essential. Although welded rails have been successfully implemented in Indonesian railways, until now there are no clear standards or regulations concerning them. This is unfortunate, as it very essential to maintain high standard welded rail joints and it�s application. The study will take into account the mechanical properties of each method and the performance indicators related to Indonesian railway conditions such as flexibility, time, productivity, troubleshooting and labour. Furthermore, cost analysis is done to determine which method is more effective and productive related to its cost. The study concluded that AT welding and gas pressure welding is mos...

JEES (Journal of English Educators Society), 2021

The present study investigates how to implement multiple e-learning technologies on practicing TO... more The present study investigates how to implement multiple e-learning technologies on practicing TOEFL PBT Section 2, Structure and Written Expression, and its effectiveness. It is a case study at Indonesian Railway Polytechnic. The participants were 48 students of the Railway Mechanical Technology program observed during eight online TOEFL practising classes. The data were collected using observation note to describe the implementation of e-learning technologies, comparing each score to determine the effectiveness of the technologies and a questionnaire to identify students’ feedback. The findings identified how to implement multiple e-learning technologies on practicing TOEFL PBT Section 2 in which effective to increase students’ TOEFL score; those technologies were regarded as interesting media on practicing TOEFL structure and written expression and received more positive feedbacks than the drawback from the students of Railway Mechanical Technology program. These imply that imple...

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2020

Penggunaan lori inspeksi dalam kegiatan perawatan prasarana sangat dibutuhkan untuk meminimalisir... more Penggunaan lori inspeksi dalam kegiatan perawatan prasarana sangat dibutuhkan untuk meminimalisir tenaga dalam pemeliharaan dan efisiensi waktu. Pengembangan lori inspeksi di Politeknik Perkeretaapian Indonesia Madiun terus dilakukan mulai dari motor penggerak, roda, frame, bodi, rubber dumper dan panel surya sebagai sumber energi utama. Motor penggerak menggunakan motor listrik BLDC (Brushless direct current) dengan daya 2680 Watt, arus 35 A dan kecepatan putar 4250 Rpm yang ramah lingkungan. Pengembangan roda lori inspeksi menggunakan struktur monoblok dengan proses pengecoran. Material yang digunakan berasal dari besi cor nodular (FCD), memiliki tingkat kekerasan rata-rata 191 HB. Rubber damper dikenal sebagai peredam kejut dengan panjang 185 mm, lebar 60 mm, dan tinggi 30 mm. Komposisi bahan Rubber damper sebagai berikut: Karet alam 55%, Carbon black 25%, White oil 5%, Zine oxide 3%, Accelerator 2%, Anti Oxidant 2%, Steread Axid 3%, dan Sulfur 5%. Bodi lori inspeksi terbuat dar...

Journal of Physics: Conference Series, 2020

The purpose of this research is to obtain the dimensions of the savonius wind turbine and to test... more The purpose of this research is to obtain the dimensions of the savonius wind turbine and to test the calculation results and design of the savonius wind turbine based on the wind speed generated due to the movement of the train in the tunnel. The method used is to calculate the dimensions of the turbine diameter. The results of the calculations show that the savonius wind turbine diameter is 60 cm with a height of 60 cm. The maximum voltage generated is 12.26 V with a current of 0.52 A at a wind speed of 5.7 m/s.

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2020

Inspection railway are a re-design of railway that have been made in the Indonesian Railway Polyt... more Inspection railway are a re-design of railway that have been made in the Indonesian Railway Polytechnic. Inspection lorry repairs are carried out on the wheels, chassis, drive and body.The new lorry wheels are made of structural iron to reduce the total weight from 148 kg to 119 kg. The size of the wheel conus is the difference between the outer and inner diameter of 30 mm to minimize wheel friction with rails in the curved region. The chassis uses the ledder frame model with emphasis on the strength of 44.29 MPa and 0.095 MPa deflection to get optimal and reliable results on the 1067 track. The material uses galvanized hollow type iron weighing 125 kg. The environmentally friendly drive used in the railway inspection is an BLDC electric motor (brushless direct current) with a capacity of 2000 watts of power, a current of 35A and a rotational speed of 4250 Rpm. The railway inspection body is made of 3 layers fiber reinforced polymers of plastics (FRP) using a hand lay-up method that...

Jurnal Perkeretaapian Indonesia, 2018

An examination of the railroad curves that have been operated can be done with a variety of avail... more An examination of the railroad curves that have been operated can be done with a variety of available gauges, however there has never been a comparison of the outputs of several gauges used to check rail curves. This study intends to examine the curvature of the railroad by comparing the results of measuring arrows manually and the use of digital measuring stations and Messreg CLS. This study also tries to provide recommendations on arch maintenance plans so that the arch conditions can be optimized for trains to pass. The measurement results show that manual curvature measurements (arrows thread) with digital measuring devices (total station and CLS messeg) give results that vary from one another, although not significantly different. The measurement results with Total Station and Messreg CLS show an average value that is greater than the measurement results using Arrows thread. The results of the inspection also showed that in order to make the railroad curvature more ideal for pa...

Journal of Physics: Conference Series, 2019

Track Holder refers to the efforts of redesigning spoor holder device that has been sold in forei... more Track Holder refers to the efforts of redesigning spoor holder device that has been sold in foreign market. Looking at the use of hammer that causes movement and damage on both the holder and the track, the manufacture of the track holder is intended to attain precise spoor width (1,067 mm) without causing any damage to the rail components under affordable budget. The manufacture of the track holder should go through three stages namely preparation, assembly/production and finishing. The track holder device that has been designed consists of two motor systems namely the manual system and the electric system. The dynamo that has been installed is Wiper Colt 130 W and 12 V 3 A Battery. Then, the weight per unit of the device is 4 kg while the length of the device is 1.30 m. The track holder device is able to sustain weight up to 3,282 kg. The prototype of the device was tested on the rail track with three devices and 2-bearing gap. The results of the test show that the track holder device is able to shift the rail track when the fastenings from all of the six bearings are uninstalled. The cost of manual track holder manufacture is IDR 1,229,000.00 while the cost of electric track holder manufacture is IDR 405,350.00. In other words, the track holder device is prominent in terms of technology and price but the use of electric track holder device should be evaluated further on the use of ratio gear and dynamo.

Jurnal Perkeretaapian Indonesia

Checking elevation differences due to deflection on the railroad (skilu) is needed to ensure the ... more Checking elevation differences due to deflection on the railroad (skilu) is needed to ensure the safety of train travel. Skilu measurements can be done with a measuring train and a manual densometer. For manual measurement, we need tools that can measure dynamic elections more accurately and efficiently. This research is intended to make these tools using ultrasonic proximity sensors with data processing by a microcontroller. The measurement accuracy of the experimental results of this tool is obtained by comparing the densometer deflection gauge. The results show that the tool can measure elections every 0.1 second (realtime) with an accuracy rate of 98.84%. In addition to the election measurements, this tool can also measure the speed of a passing train and the rail temperature when a train passes. The measurement results can help optimize the care needed for the election that occurs at the observation site.

Jurnal Pengabdian UNDIKMA, Aug 19, 2022

The community service about training in using Mendeley application as a citation and reference ma... more The community service about training in using Mendeley application as a citation and reference manager instrument in writing article for university students in Madiun aims to share knowledge for academicians in writing article citation and reference manager using Mendeley. The participants of this community service are the university students in Madiun. This activity was done through discussion and simulation in Zoom meeting. It was started with planning and socialization for a month through social media. The simulation was done through Zoom meeting in a day. Evaluation of this activity was done by giving questionnaire for all participants at the end of the training. The results of the evaluation showed that the training of article citation and reference manager in writing article benefits for the university students in writing appropriate APA 7th edition-citation.

V-MAC (Virtual of Mechanical Engineering Article)

Composite material is a type of new, engineered material consisting of two or more materials wher... more Composite material is a type of new, engineered material consisting of two or more materials where the properties of each material differ from one another both in chemical and physical properties and remain separate in the final material. Composite materials have many advantages, one of which is lighter weight and corrosion resistance. In this study, composites made from glass fiber were carried out with variations in the arrangement of laminates, in order to select the material which was then applied to the manufacture of the inspection lorry body. Composites were made using the hand lay-up method. Tensile test specimens made according to ASTM D-638. The results of the tensile test show that the highest tensile strength of glass fiber composite material for the inspection lorry body is 5.45 MPa and the lowest tensile strength is 4.62 MPa. Keyword: composite, glass fiber, tensile test, inspection lorry

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2018

Tunnel construction in the Jakarta MRT (MRTJ) is a concrete tunnel that was built using the Tunne... more Tunnel construction in the Jakarta MRT (MRTJ) is a concrete tunnel that was built using the Tunnel Boring Machine (TBM) drill machine. Tunnel walls in underground construction use pre-cast (segment) concrete materials arranged in a circle directly into one ring segment by TBM. Tunnel checks are needed to be the basis of diagnosis in tunnel care. Tunnel maintenance is carried out to maintain the condition of the tunnel to function properly and safely to be operated in a sustainable manner in accordance with the predicted load, including: the burden of soil or overburden, dead load and live load, load due to water pressure, earthquake load, and other loads that will affect tunnel construction. The results of the study that damage to the tunnel wall can be classified as leaks and cracks. Examination of components in the MRTJ tunnel wall by paying attention to the detail part of the wall in the form of segment bolts, connections between segments, concrete structures in segments. As for ...

Madiun Spoor (JPM)

Desa Klagenserut adalah desa di kecamatan Jiwan, kabupaten Madiun, Jawa Timur, Indonesia. Mata pe... more Desa Klagenserut adalah desa di kecamatan Jiwan, kabupaten Madiun, Jawa Timur, Indonesia. Mata pencaharian utama masyarakat Desa Klagenserut adalah bertani, berdagang dan wirausaha. Selain itu, warga menciptakan lapangan kerja sendiri yang dibutuhkan oleh warga lain. Sebagian warga membuka sebuah usaha dengan membuka sebuah bengkel las rumahan. Mereka mengerjakan beberapa produk dan menghasilkan sebuah produk seperti pembuatan pagar besi, tralis besi, kanopi, tangga besi, perbaikan mesin pertanian dan sebagainya. Bengkel las tersebut mengerjakan produk tersebut dari material besi hollow, besi plat, besi siku dan juga material stainless steel. Material stainless steel ini di masyarakat dikenal sebagai material yang tahan korosi dan mempunyai nilai estetika lebih bagus dibandingkan material logam lainnya. Namun masyarakat Desa Klagenserut khususnya yang membuka usaha dengan membuka bengkel las rumahan, masih belum memahami betul bagaimana cara yang tepat dalam melakukan proses pemoton...

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2021

Perawatan sistem penambat merupakan upaya dilakukan agar penambat pada rel kereta api tetap dalam... more Perawatan sistem penambat merupakan upaya dilakukan agar penambat pada rel kereta api tetap dalam kondisi yang baik. Memasang dan melepas penambat di Indonesia menggunakan alat manual yaitu palu dan panpuller sehingga membutuhkan waktu yang cukup lama dan kurang efektif, sehingga pengembangan alat ditujukan agar dapat meminimalisir penggunaan tenaga manusia, lebih efektif dan tidak memerlukan banyak waktu untuk memasang dan melepas penambat. Pembuatan alat pemasang dan pelepas penambat berbasis hidrolik ini dilakukan pengembangan alat lama menjadi alat baru. Alat pemasang dan pelepas penambat berbasis hidrolik memiliki panjang 105 cm, lebar 67 cm dan tinggi 91 cm yang mampu meminimalisir penggunaan tenaga manusia dan lebih efektif dalam pemasangan maupun pelepasan penambat. Penggunaan alat tersebut dengan cara menempatkan alat diatas rel dan memposisikan silinder hidrolik di depan penambat, kemudian pompa dengan menggunakan tuas pompa hidrolik hingga penambat dapat terpasang maupun ...

CIVED, 2021

Penelitian yang berjudul analisis faktor-faktor aspek material dan Sumber Daya Manusia (SDM) yang... more Penelitian yang berjudul analisis faktor-faktor aspek material dan Sumber Daya Manusia (SDM) yang terdampak pandemi Covid-19 di proyek satuan kerja Balai Teknik Perkeretaapian (BTP) Jawa Timur ini bertujuan mengetahui faktor-faktor SDM apa saja yang terdampak pandemi Covid-19 di Proyek Satuan Kerja BTP Jawa Timur. Metode analisis data yang digunakan dalam penelitian ini adalah dengan mengunakan analisis statistika dengan analisis faktor . Metode pengumpulan data yang digunakan adalah menggunakan kuisioner dengan jumlah responden sebanyak 30 orang yang merupakan pekerja proyek pada satuan kerja BTP Jawa Timur pada masa pandemi Covid-19 . Pengolahan data dilakukan dengan program SPSS versi 24.0. Aspek yang dianalisis dalam penelitian ini adalah aspek Material dan SDM. Hasil Penelitian menunjukkan bahwa faktor pada aspek SDM yang dominan terdampak pandemi Covid-19 di proyek satuan kerja BTP Jawa Timur adalah ketersediaan tenaga kerja. Sedangkan faktor pada aspek material yang dominan ...

JNANALOKA, 2021

Sistem suspensi merupakan komponen penting dalam kendaraan, karena berfungsi sebagai peredam geta... more Sistem suspensi merupakan komponen penting dalam kendaraan, karena berfungsi sebagai peredam getaran bagi kendaraan ketika dikendarai oleh penggunanya. Ada beberapa jenis sistem suspensi yang diterapkan pada kendaraan. Salah satu komponen yang paling penting dalam meredam getaran adalah karet. Pembuatan suspensi karet dimulai dari perencanaan. Perencanaan ini meliputi proses desain dan pemilihan material. Desain karet menggunakan software autodesc inventor dengan memperhatikan kekuatan karet. Desain lebih menitik beratkan pada kekuatan karet ketika menerima beban. Lori inspeksi dirancang dengan kecepatan operasional 20 Km/jam dan kecepatan maksimum 25 Km/jam. Pemilihan bahan dengan menggunakan beberapa campuran bahan kimia dan karet alam yang dominan untuk menambah kekuatan karet. Pembuatan karet dilakukan di tempat industri karet CV Juwahir Berdikari yang berada di Gorang gareng kabupaten Magetan. Dengan beberapa tahapan proses yang membutuhkan mesin khusus untuk menghasilkan produ...

This study discusses long bridge superstructure planning. The reference used for the design of ... more This study discusses long bridge superstructure planning. The reference used for the design of the bridge is the Regulation of the Minister of Transportation No. 60 of 2012 on Technical Requirements of Railways, AREMA and the rules of the European Union. The loading of the superstructure of the railway bridge includes dead load, live load, shock load, horizontal load, and wind load. This bridge profile needs analysis using the influence line method with SAP 2000 application. The result of superstructure analysis of 100 meter railway bridge type of lower truss frame shows that the size for structure profile, stringer, and cross girder must be specially designed by utilizing SM400 type steel plate with welding. From the analysis result, the working force of stringer is 1618,74 kN with a deflection of 11,58 mm; Force on a transverse girder of 2348.16 kN; Upperchord of 6340.45 kN; Lower Frame (Lowerchord) of 7441.33 kN; And members in the amount of 5599.48...

Composite material is a type of new, engineered material consisting of two or more materials wher... more Composite material is a type of new, engineered material consisting of two or more materials where the properties of each material differ from one another both in chemical and physical properties and remain separate in the final material. Composite materials have many advantages, one of which is lighter weight and corrosion resistance. In this study, composites made from glass fiber were carried out with variations in the arrangement of laminates, in order to select the material which was then applied to the manufacture of the inspection lorry body. Composites were made using the hand lay-up method. Tensile test specimens made according to ASTM D-638. The results of the tensile test show that the highest tensile strength of glass fiber composite material for the inspection lorry body is 5.45 MPa and the lowest tensile strength is 4.62 MPa. Keyword: composite, glass fiber, tensile test, inspection lorry

Locomotive CC 206 is the newest locomotive owned by PT Kereta Api Indonesia. Inside the CC 206 lo... more Locomotive CC 206 is the newest locomotive owned by PT Kereta Api Indonesia. Inside the CC 206 locomotive is equipped with a sophisticated smart display that can monitor all size parameters and damage to the locomotive itself. One of the capabilities of the CC 206 locomotive is the pop test. Pop test is the ability of the CC 206 locomotive to test the performance of each cylinder of the diesel engine. Based on the pop test results, there are various disturbances that often occur during maintenance of the CC 206 locomotive diesel engine.The purpose of this analysis is to analyze the pop test results as a reliability parameter on the CC 206 locomotive diesel engine, to analyze the factors causing the disturbance in the pop test results and analyze the effect of the failure of the pop test results on performance. Based on the results of the pop test, it was found that one of the cylinders was abnormal because the injector was under pressure, the injector spring was damaged and there wa...

The purpose of this study was to analyze the stress, displacement, and factor of safety that occu... more The purpose of this study was to analyze the stress, displacement, and factor of safety that occurred in the valblock safety device. With the maximum load that occurs at the knuckle is 7473 N. Testing is done using Solidworks simulation software. The material used is AISI 1045 with allowable stress of 450 MPa. The results of the analysis that came out of the simulation were the maximum stress values, displacement, and the factor of safety. The maximum stress results in static conditions that the tool is only able to withstand loads up to 7000 N with a value of 3,540 , and does not exceed the maximum allowable stress limit of the tool, which is 5,300 . The result of the loading is a change in the shape of the stem, namely displacement or deflection. The results obtained from the deflection of 1.3 mm. For the results of the factor of safety, the tool is worth 1.5 at a load of 7000 N so that the valblock safety device is safe to use up to 7000 N loading. Key Words: Coupler, Valblock, T...

Indonesian railways, to reduce track maintenance costs and increase passenger comfort, have imple... more Indonesian railways, to reduce track maintenance costs and increase passenger comfort, have implemented continuous welded rail infrastructures. To achieve and maintain their functions, these infrastructures require high weld quality, which can be achieved using suitable welding methods therefore, sustainable rail welding is essential. Although welded rails have been successfully implemented in Indonesian railways, until now there are no clear standards or regulations concerning them. This is unfortunate, as it very essential to maintain high standard welded rail joints and it�s application. The study will take into account the mechanical properties of each method and the performance indicators related to Indonesian railway conditions such as flexibility, time, productivity, troubleshooting and labour. Furthermore, cost analysis is done to determine which method is more effective and productive related to its cost. The study concluded that AT welding and gas pressure welding is mos...

JEES (Journal of English Educators Society), 2021

The present study investigates how to implement multiple e-learning technologies on practicing TO... more The present study investigates how to implement multiple e-learning technologies on practicing TOEFL PBT Section 2, Structure and Written Expression, and its effectiveness. It is a case study at Indonesian Railway Polytechnic. The participants were 48 students of the Railway Mechanical Technology program observed during eight online TOEFL practising classes. The data were collected using observation note to describe the implementation of e-learning technologies, comparing each score to determine the effectiveness of the technologies and a questionnaire to identify students’ feedback. The findings identified how to implement multiple e-learning technologies on practicing TOEFL PBT Section 2 in which effective to increase students’ TOEFL score; those technologies were regarded as interesting media on practicing TOEFL structure and written expression and received more positive feedbacks than the drawback from the students of Railway Mechanical Technology program. These imply that imple...

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2020

Penggunaan lori inspeksi dalam kegiatan perawatan prasarana sangat dibutuhkan untuk meminimalisir... more Penggunaan lori inspeksi dalam kegiatan perawatan prasarana sangat dibutuhkan untuk meminimalisir tenaga dalam pemeliharaan dan efisiensi waktu. Pengembangan lori inspeksi di Politeknik Perkeretaapian Indonesia Madiun terus dilakukan mulai dari motor penggerak, roda, frame, bodi, rubber dumper dan panel surya sebagai sumber energi utama. Motor penggerak menggunakan motor listrik BLDC (Brushless direct current) dengan daya 2680 Watt, arus 35 A dan kecepatan putar 4250 Rpm yang ramah lingkungan. Pengembangan roda lori inspeksi menggunakan struktur monoblok dengan proses pengecoran. Material yang digunakan berasal dari besi cor nodular (FCD), memiliki tingkat kekerasan rata-rata 191 HB. Rubber damper dikenal sebagai peredam kejut dengan panjang 185 mm, lebar 60 mm, dan tinggi 30 mm. Komposisi bahan Rubber damper sebagai berikut: Karet alam 55%, Carbon black 25%, White oil 5%, Zine oxide 3%, Accelerator 2%, Anti Oxidant 2%, Steread Axid 3%, dan Sulfur 5%. Bodi lori inspeksi terbuat dar...

Journal of Physics: Conference Series, 2020

The purpose of this research is to obtain the dimensions of the savonius wind turbine and to test... more The purpose of this research is to obtain the dimensions of the savonius wind turbine and to test the calculation results and design of the savonius wind turbine based on the wind speed generated due to the movement of the train in the tunnel. The method used is to calculate the dimensions of the turbine diameter. The results of the calculations show that the savonius wind turbine diameter is 60 cm with a height of 60 cm. The maximum voltage generated is 12.26 V with a current of 0.52 A at a wind speed of 5.7 m/s.

Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), 2020

Inspection railway are a re-design of railway that have been made in the Indonesian Railway Polyt... more Inspection railway are a re-design of railway that have been made in the Indonesian Railway Polytechnic. Inspection lorry repairs are carried out on the wheels, chassis, drive and body.The new lorry wheels are made of structural iron to reduce the total weight from 148 kg to 119 kg. The size of the wheel conus is the difference between the outer and inner diameter of 30 mm to minimize wheel friction with rails in the curved region. The chassis uses the ledder frame model with emphasis on the strength of 44.29 MPa and 0.095 MPa deflection to get optimal and reliable results on the 1067 track. The material uses galvanized hollow type iron weighing 125 kg. The environmentally friendly drive used in the railway inspection is an BLDC electric motor (brushless direct current) with a capacity of 2000 watts of power, a current of 35A and a rotational speed of 4250 Rpm. The railway inspection body is made of 3 layers fiber reinforced polymers of plastics (FRP) using a hand lay-up method that...

Jurnal Perkeretaapian Indonesia, 2018

An examination of the railroad curves that have been operated can be done with a variety of avail... more An examination of the railroad curves that have been operated can be done with a variety of available gauges, however there has never been a comparison of the outputs of several gauges used to check rail curves. This study intends to examine the curvature of the railroad by comparing the results of measuring arrows manually and the use of digital measuring stations and Messreg CLS. This study also tries to provide recommendations on arch maintenance plans so that the arch conditions can be optimized for trains to pass. The measurement results show that manual curvature measurements (arrows thread) with digital measuring devices (total station and CLS messeg) give results that vary from one another, although not significantly different. The measurement results with Total Station and Messreg CLS show an average value that is greater than the measurement results using Arrows thread. The results of the inspection also showed that in order to make the railroad curvature more ideal for pa...

Journal of Physics: Conference Series, 2019

Track Holder refers to the efforts of redesigning spoor holder device that has been sold in forei... more Track Holder refers to the efforts of redesigning spoor holder device that has been sold in foreign market. Looking at the use of hammer that causes movement and damage on both the holder and the track, the manufacture of the track holder is intended to attain precise spoor width (1,067 mm) without causing any damage to the rail components under affordable budget. The manufacture of the track holder should go through three stages namely preparation, assembly/production and finishing. The track holder device that has been designed consists of two motor systems namely the manual system and the electric system. The dynamo that has been installed is Wiper Colt 130 W and 12 V 3 A Battery. Then, the weight per unit of the device is 4 kg while the length of the device is 1.30 m. The track holder device is able to sustain weight up to 3,282 kg. The prototype of the device was tested on the rail track with three devices and 2-bearing gap. The results of the test show that the track holder device is able to shift the rail track when the fastenings from all of the six bearings are uninstalled. The cost of manual track holder manufacture is IDR 1,229,000.00 while the cost of electric track holder manufacture is IDR 405,350.00. In other words, the track holder device is prominent in terms of technology and price but the use of electric track holder device should be evaluated further on the use of ratio gear and dynamo.

Jurnal Perkeretaapian Indonesia

Checking elevation differences due to deflection on the railroad (skilu) is needed to ensure the ... more Checking elevation differences due to deflection on the railroad (skilu) is needed to ensure the safety of train travel. Skilu measurements can be done with a measuring train and a manual densometer. For manual measurement, we need tools that can measure dynamic elections more accurately and efficiently. This research is intended to make these tools using ultrasonic proximity sensors with data processing by a microcontroller. The measurement accuracy of the experimental results of this tool is obtained by comparing the densometer deflection gauge. The results show that the tool can measure elections every 0.1 second (realtime) with an accuracy rate of 98.84%. In addition to the election measurements, this tool can also measure the speed of a passing train and the rail temperature when a train passes. The measurement results can help optimize the care needed for the election that occurs at the observation site.