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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Interactive stability-oriented reliability-based design optimization
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Interactive stability-oriented reliability-based design optimization

机译：面向交互式稳定性的基于可靠性的设计优化

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摘要

Recent advances in reliability methods, optimization as well as design sensitivity analysis have resulted in development of computational systems supporting reliability--based design optimization (RBDO) processes for medium/large structures. For RBDO the efficiency problems are critical and in order to get the optimum design a number of fast approximate methods have been recently proposed. These methods, tested for rather small problems, show acceptable accuracy and speed up computations considerably. However, when applied in the automated way to medium/large scale problems they may cause severe convergence problems or lead to a poor local minimum after expensive computations. Convergence problems are manifested in a specially severe way when stability of structures is under consideration. Instead of an automated optimization procedure, an interactive approach is proposed. Implemented in the POLSAP--RBO system, it allows to combine effective interactive design methods with visual capabilities to efficiently generate optimum design. The system allows to consider the local and global stability problems of truss structures. Interactive stability--oriented reliability optimization of an offshore jacket and truss--column is discussed in detail.
机译：可靠性方法，优化以及设计敏感性分析的最新进展导致了计算系统的开发，该系统支持中/大型结构的基于可靠性的设计优化（RBDO）过程。对于RBDO，效率问题非常关键，为了获得最佳设计，最近提出了许多快速近似方法。这些方法经过相当小的问题测试，显示出可接受的准确性并大大加快了计算速度。但是，当以自动化方式将其应用于中/大规模问题时，它们可能会导致严重的收敛问题或在进行昂贵的计算后导致较差的局部最小值。当考虑结构的稳定性时，收敛问题以特别严重的方式表现出来。代替自动优化过程，提出了一种交互式方法。它在POLSAP-RBO系统中实施，可以将有效的交互式设计方法与可视功能相结合，以有效地生成最佳设计。该系统允许考虑桁架结构的局部和整体稳定性问题。详细讨论了以交互稳定性为导向的海上护套和桁架柱的可靠性优化。

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