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Papers by Renaud Warnotte

Research paper thumbnail of Automated structural optimisation of ships’ midship section in concept design phase

Trends in the Analysis and Design of Marine Structures, 2019

Research paper thumbnail of An analytical cost assessment module for the detailed design stage, COMPIT’2006, Edt. TUDelft, NL

The main goal of the project is to implement a “real time ” and automatic cost assessment model o... more The main goal of the project is to implement a “real time ” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost asses...

Research paper thumbnail of Tools for early design stage: presentation of LBR-5 Software

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints - struc... more LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints - structural, geometrical, etc. - an optimum scantling can quickly been found. In the framework of IMPROVE European project many new modules have been implemented to increase the quality of the optimised scantling. Mainly 6 major changes have been brought: implementation of a sloshing module, a fatigue module, a multi-structure module, a multi-materials module, a life cycle cost module and finally a vibration module. Tests to validate these modules have been carried out on the three ships studied in the IMPROVE project: a LNG, a Chemical Tanker and a ROPAX.

Research paper thumbnail of An Analytical Cost Assessment Module for the Detailed Design Stage

The main goal of the project is to implement a “real time” and automatic cost assessment model of... more The main goal of the project is to implement a “real time” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assess...

Research paper thumbnail of Automated scantling optimization of ships’ midship transverse frame in concept design phase

Research paper thumbnail of OptiView − A Powerful and Flexible Decision Tool Optimising Space Allocation in Shipyard Workshops

This paper presents new developments to maximize the number of ship blocks and ship sections prod... more This paper presents new developments to maximize the number of ship blocks and ship sections produced in various workshops of shipyards during a certain time window. The visualization tool OptiView® was developed to support users to improve the space utilization and workshop productivity. The software is coupled with a heuristic optimisation solver. The paper describes the approach to the space allocation problem and gives three application examples.

Research paper thumbnail of An integrated framework for ship structural optimisation in contract design phase

Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XI, Construcţii navale/ Annals of "Dunărea de Jos" of Galati, Fascicle XI, Shipbuilding

This paper demonstrates the implementation of an integrated workflow for the finite element-based... more This paper demonstrates the implementation of an integrated workflow for the finite element-based structural assessment/optimization of a 3D midship segment of RoPax vessel within the contract design phase. Commercial software such as AVEVA Marine ® , ANSYS ® and modeFRONTIER ® and newly developed in-house tools/modules have been integrated under an automated iterative routine. The structural optimisation carried out with an aim to reduce the structural weight of the ship with least value for vertical centre of gravity. Constraints implemented in the optimization include relevant BV rules and shipyard requirements.The work is performed within the framework of European Union's HOLISHIP (2016-2020) project.

Research paper thumbnail of An analytical cost assessment module for the detailed design stage

The main goal of the project is to implement a "real time" and automatic cost assessment model of... more The main goal of the project is to implement a "real time" and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assessment module reaches the validation stage at the Alstom Marine St Nazaire shipyard (Chantiers de l'Atlantique) within the framework of the European project InterSHIP which has partly financed the study. In the future, cost assessment will become increasing important. It is proposed to assist/help the designers by a "real time" follow-up of the cost, starting at the earliest conceptual design stage up to the latest detailed design stage. The development such a cost assessment tool requires considering simultaneously the design criteria and the production parameters. Designers will consequently be able to choose the least expensive options at each step of the design procedure (earlier is of course better).

Research paper thumbnail of Tools for early design stage: presentation of LBR-5 Software

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints-structu... more LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints-structural, geometrical, etc.-an optimum scantling can quickly been found. In the framework of IMPROVE European project many new modules have been implemented to increase the quality of the optimised scantling. Mainly 6 major changes have been brought: implementation of a sloshing module, a fatigue module, a multi-structure module, a multi-materials module, a life cycle cost module and finally a vibration module. Tests to validate these modules have been carried out on the three ships studied in the IMPROVE project: a LNG, a Chemical Tanker and a ROPAX.

Research paper thumbnail of Automated structural optimisation of ships’ midship section in concept design phase

Trends in the Analysis and Design of Marine Structures, 2019

Research paper thumbnail of An analytical cost assessment module for the detailed design stage, COMPIT’2006, Edt. TUDelft, NL

The main goal of the project is to implement a “real time ” and automatic cost assessment model o... more The main goal of the project is to implement a “real time ” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost asses...

Research paper thumbnail of Tools for early design stage: presentation of LBR-5 Software

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints - struc... more LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints - structural, geometrical, etc. - an optimum scantling can quickly been found. In the framework of IMPROVE European project many new modules have been implemented to increase the quality of the optimised scantling. Mainly 6 major changes have been brought: implementation of a sloshing module, a fatigue module, a multi-structure module, a multi-materials module, a life cycle cost module and finally a vibration module. Tests to validate these modules have been carried out on the three ships studied in the IMPROVE project: a LNG, a Chemical Tanker and a ROPAX.

Research paper thumbnail of An Analytical Cost Assessment Module for the Detailed Design Stage

The main goal of the project is to implement a “real time” and automatic cost assessment model of... more The main goal of the project is to implement a “real time” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assess...

Research paper thumbnail of Automated scantling optimization of ships’ midship transverse frame in concept design phase

Research paper thumbnail of OptiView − A Powerful and Flexible Decision Tool Optimising Space Allocation in Shipyard Workshops

This paper presents new developments to maximize the number of ship blocks and ship sections prod... more This paper presents new developments to maximize the number of ship blocks and ship sections produced in various workshops of shipyards during a certain time window. The visualization tool OptiView® was developed to support users to improve the space utilization and workshop productivity. The software is coupled with a heuristic optimisation solver. The paper describes the approach to the space allocation problem and gives three application examples.

Research paper thumbnail of An integrated framework for ship structural optimisation in contract design phase

Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XI, Construcţii navale/ Annals of "Dunărea de Jos" of Galati, Fascicle XI, Shipbuilding

This paper demonstrates the implementation of an integrated workflow for the finite element-based... more This paper demonstrates the implementation of an integrated workflow for the finite element-based structural assessment/optimization of a 3D midship segment of RoPax vessel within the contract design phase. Commercial software such as AVEVA Marine ® , ANSYS ® and modeFRONTIER ® and newly developed in-house tools/modules have been integrated under an automated iterative routine. The structural optimisation carried out with an aim to reduce the structural weight of the ship with least value for vertical centre of gravity. Constraints implemented in the optimization include relevant BV rules and shipyard requirements.The work is performed within the framework of European Union's HOLISHIP (2016-2020) project.

Research paper thumbnail of An analytical cost assessment module for the detailed design stage

The main goal of the project is to implement a "real time" and automatic cost assessment model of... more The main goal of the project is to implement a "real time" and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assessment module reaches the validation stage at the Alstom Marine St Nazaire shipyard (Chantiers de l'Atlantique) within the framework of the European project InterSHIP which has partly financed the study. In the future, cost assessment will become increasing important. It is proposed to assist/help the designers by a "real time" follow-up of the cost, starting at the earliest conceptual design stage up to the latest detailed design stage. The development such a cost assessment tool requires considering simultaneously the design criteria and the production parameters. Designers will consequently be able to choose the least expensive options at each step of the design procedure (earlier is of course better).

Research paper thumbnail of Tools for early design stage: presentation of LBR-5 Software

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints-structu... more LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints-structural, geometrical, etc.-an optimum scantling can quickly been found. In the framework of IMPROVE European project many new modules have been implemented to increase the quality of the optimised scantling. Mainly 6 major changes have been brought: implementation of a sloshing module, a fatigue module, a multi-structure module, a multi-materials module, a life cycle cost module and finally a vibration module. Tests to validate these modules have been carried out on the three ships studied in the IMPROVE project: a LNG, a Chemical Tanker and a ROPAX.