Determining the probability of failure for a diesel electric locomotive 060-DA using fault tree analysis (original) (raw)
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IOP conference series, 2018
The increasing complexity of technical systems, together with their increasingly important functions, determines the continuously growing importance of reliability studies. The working regime parameters are more and more intense, the operating conditions are more and more complex, leading to the need of a large scale automation of production processes, and also of their control, including the use of some powerful process computers. Industrial products, mechanical equipment and devices, various machine components, and so on, they can all be regarded as basic units with autonomous operation, embedded in complex aggregates or installations. The 060-DA diesel-electric locomotive is SUCH a complex set of components and subassemblies, working together, so that any accidental failure of a basic constituent could lead to a total or partial decommissioning of the locomotive, or to its incorrect operation. The subject of the present paper is a reliability analysis for the most important components and subassemblies from the structure of 060-DA diesel-electric locomotive.
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Energies
This article presents a mathematical model of the risk of failures, depending on the operating parameters, of locomotive diesel engines. The purpose of this study is to determine the risk of failures of locomotive diesel engines in maintenance. The theory of probability and the theory of logic and reliability are used in this theoretical study. The innovations and main works are the first approaches to calculating the risk of failures of locomotive diesel engines by hourly fuel consumption, which, under operational conditions, allows for extending the life of locomotive diesel engines during maintenance. As a result, a maintenance process for 5D49 diesel engines is developed in a locomotive depot. When managing the maintenance processes of 5D49 diesel engines in the locomotive depot, it is determined that the optimal mileage is 45,000 km. The resource of 5D49 diesel engines in the locomotive depot increased by 2.4% in the management of the maintenance process compared to the existin...
International Journal of Mathematical, Engineering and Management Sciences
Nuclear power plants (NPPs) are subjected to events such as equipment failures, human errors and common-cause failures, in an environment of complex maintenance, inspection and testing managements. These events will affect the reliability of safety-related systems, as well as the risk level of the plant. Reliability block diagram (RBD) is often used to analyze the effect of item failures on system availability, taking into account their physical arrangement in the system. Fault tree (FT) is a commonly used technique for analyzing risk and reliability in nuclear, aeronautical and chemical industries. It represents graphically the basic events that will cause an undesired top event. Loss of electrical power is one of the main events that influences safe operation of NPPs, as well as accident prevention and mitigation. In case of unavailability of offsite power, emergency diesel generators (EDGs) supply onsite electrical power. This paper carries out reliability analyses of EDGs of NPP...
Fault Tree Analysis in the Reliability of Heavy Fuel Oil Supply
Transactions on Maritime Science, 2014
Marine systems are complex and through the analysis of their reliability it is necessary to observe the reliability of their subsystems and components. With regard to the fact that the reliability is functionally dependent on faults, for the purpose of this study special attention has been given to possible faults on the heavy fuel oil supply pump of a two-stroke marine diesel engine MAN B&W 5L90MC. A deductive approach to reliability analysis, i.e. fault tree analysis method (FTA), has been used. By the use of this method it is simpler to identify the system’s weak link and it is shown that the method gives the basis for the ship’s system reliability analysis. Based on FTA analysis this paper suggests system parameters that require continuous monitoring in order to achieve reliability. The results show the behavior of the components in case of faults and this approach can help to create a plan of action in order to enforce timely corrective and preventive action and, accordingly, i...
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1977
Originally presented as the first author's thesis, (Sc. D.)--in the M.I.T. Dept. of Nuclear Engineering, 1977Includes bibliographical references (p. 311-312
Reliability analysis of complex technical systems using the fault tree modularization technique
1980
CHAPTER 2 TIME DEPENDENT FAULT TREE ANALYSIS 62 2.1 Introduction 62 2.2 Class 1 Components: Time Independent Components 63 2.3 Class 2 Components: Nonrepairable Components 66 6 Page 2.4 Class 3 Components: Repairable Components 2.5 Class 4 Components: Periodically Tested Components 2.6 General Time Dependent Relations for the Evaluation of Fault Trees by Using the Modular Concept 2.7 General Relations for Time Dependent Simple Modules Consisting of Only Repairable Components (Class 3 Components) 2.8, General Relationships for a Time-Dependent Simple Module Consisting of Only Non-Repairable Components (Class 2 Components) CHAPTER 3 REDUCTION OF LARGE FAULT TREES BASED ON THE VESELY-FUSSELL IMPORTANCE MEASURES 3.1 Introduction 3.2 Importance Measures and the Use of PL-MOD to Calculate the V-F Importance Measures 3.3 Use of the Code PL-MOD for Reducing Large Fault Trees 103 3.4 Reductions of LPRS and HPIS Fault Trees 104 CHAPTER 4 MONTE-CARLO SIMULATION OF TOP EVENT PROBABILITY 109 4.1 Introduction 109 4.2 The Log-Normal Distribution 111 4.2.1 Justification for Use of Log-Normal Distribution 111 4.2.2 Characteristics and Some of the Mathematical Concepts of Log-Normal Distribution 111 4.3 Mathematical Concepts used in PL-MODMC for the Monte-Carlo Simulation 113 4.4 Distribution Models for the Modules of a Coherent System Fault Tree 121
Evaluation of the Main Causes of Diesel Engine Injector Failure using Fault Tree Analysis
Al-Khwarizmi Engineering Journal
The maintenance of the diesel engine parts in any electric power station contains many problems that lead to stopping. Several reasons lead to such problems; these reasons should be analyzed and evaluated in order to eliminate their effects. This paper is based on evaluation of the main causes that lead to diesel engine injector failure as a main part of electric power stations, using fault tree analysis (FTA). The FTA is the most broadly utilized strategies in the industrial area to perform reliability analysis of complex designing frameworks. A fault tree is a logical representation of the relationship of basic events that lead to a given unwanted event (i.e., top event). Starting with introducing the FTA and how it could be utilized in analyzing the reasons of main issues that lead to that the injector stops working, in which the probability of occurrence of each issue is calculated. The application of the root cause analysis principle of diesel engine injector failure in diesels...
Power System Reliability Analysis Using Fault Trees
The power system reliability analysis method is developed from the aspect of reliable delivery of electrical energy to customers. The method is developed based on the fault tree analysis, which is widely applied in the Probabilistic Safety Assessment (PSA). The method is adapted for the power system reliability analysis. The method is developed in a way that only the basic reliability parameters of the analysed power system are necessary as an input for the calculation of reliability indices of the system. The modeling and analysis was performed on an example power system consisting of eight substations. The results include the level of reliability of current power system configuration, the combinations of component failures resulting in a failed power delivery to loads, and the importance factors for components and subsystems.
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The article provides analysis of the passivity of various options for the rational use of the fleet of diesel locomotives with the purpose of improving the operational reliability indicators of diesel engines installed on freight diesel locomotives. The rationality of the use of mathematical statistical methods, with their application to in-service diesel engines installed on diesel locomotives, was assessed with the use of the accumulated statistical data on breakdowns/disorders of main-line diesel locomotives of State Company “Lietuvos geležinkeliai” (Lithuanian Railways). On the basis of technical documentation, with the use of the results of comparative tests and practically approbated indirect diesel engine reliability criteria, the comparative assessment of the operating life of in-service diesel engines installed on freight diesel locomotives has been performed. In order to substantiate the adequacy of tests, the adaptation of the programme modules of mathematical computer si...
Computerized fault tree construction for improved reliability analysis
Risk Analysis VII, 2010
Fault Tree Analysis is a well-known method for reliability evaluation of systems. However, manual construction of fault trees is a tedious and time-consuming task. Thus, many researchers tried to get benefit of high speed and accuracy of digital computers to automate this process. Automated construction of fault trees can be very useful in system reliability analysis, especially in design step, where we need to choose the most reliable design out of several design options.