加快可靠性优化设计的迭代收敛速度新方法

A new approach of accelerating the iterative rapidity of convergence in reliability-based optimum design

本研究阐述了优化设计问题的求解方法,给出基于系统可靠度的结构优化设计数学模型,对以往求解优化模型时用的优化准则法进行了介绍和改进。通过实例的求解过程,验证了改进后的优化准则法的良好效果,即迭代收敛速度加快。这种改进对系统失效模式较多的情况,效果更为明显。

This paper introduces the basic methods of optimum design, and proposes the mathematical model of the structural optimum design based on systematic reliability, aiming to discuss and improve the methods of optimization criterion previously used to solve this mathematical model. The good effect of accelerated iterative rapidity of convergence is indicated during the process of solving a case of seven-bar truss. Improvement will be more obvious in case the structure has more failure models.