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• W4387469341 abstract "Time-dependent reliability-based design optimization (TRBDO) has attracted intensive research attentions in recent years by virtue of its unique ability to allow consideration of dynamic uncertainties caused by stochastic processes and material property degradation. However, existing TRBDO methods are generally too intricate to be practically applicable for practical engineering application. On top of that, extremely high computational cost for complex TRBDO problems further hinders its practicability. To facilitate smooth implementation via enhancing computational efficiency in solving TRBDO problems, this study proposes an innovative and efficient solution framework. The strategy is that time-dependent performance function in each probabilistic constraint is discretized into a series of instantaneous performance functions to transform the original TRBDO problem into a RBDO problem. The reliability of each probabilistic constraint in the transformed RBDO problem is then considered under extreme value condition. With engagement of the first-order reliability method, a double-loop method is proposed to transform the RBDO problem is transformed into two different triple-loop time-independent RBDO problem. However, the issue of expensive computational cost still persists due to the triple-loop structure and identification of temporal variables under extreme value condition. To this gap, a decoupled strategy is adopted to resolve the triple-loop structure into a series of cycles of double-loop reliability analyses and deterministic optimization. Two numerical examples and three engineering applications are employed to demonstrate the supreme computational performance of the currently proposed solution framework. Results show that the proposed framework is capable of achieving a reliable optimal design at a fast convergence speed." @default.
• W4387469341 created "2023-10-10" @default.
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• W4387469341 date "2024-01-01" @default.
• W4387469341 modified "2023-10-11" @default.
• W4387469341 title "A new solution framework for time-dependent reliability-based design optimization" @default.
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• W4387469341 doi "https://doi.org/10.1016/j.cma.2023.116475" @default.
• W4387469341 hasPublicationYear "2024" @default.
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