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Optimisation fiabiliste de la conception et de la maintenance des stuctures

Abstract : The design of structural systems must fulfil several criteria, such as cost, safety and durability. The challenge of the optimization is how to find the optimal compromise between the conflicting design requirements. However, the structural design involves several kinds of uncertainties, which are usually considered through the partial safety factors. Generally, the use of these safety factors leads to over-designing or under-designing structures. The Reliability-Based Design Optimization (RBDO) is developed to search the best compromise between cost reduction and reliability assurance, by considering system uncertainties. In this work, a new RBDO method with including the system reliability requirement and considering the failure mode interactions is proposed. Besides, this formulation leads to ensure appropriate safety level during the whole structure lifetime. Finally, the best solution is searched by minimizing the total cost function which the maintenance costs are integrated.
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Submitted on : Tuesday, August 28, 2012 - 3:27:48 PM
Last modification on : Wednesday, May 11, 2016 - 1:20:18 PM
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  • HAL Id : tel-00726003, version 1


Younes Aoues. Optimisation fiabiliste de la conception et de la maintenance des stuctures. Génie des procédés. Université Blaise Pascal - Clermont-Ferrand II, 2008. Français. ⟨NNT : 2009CLF21908⟩. ⟨tel-00726003⟩



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