期刊论文

Parameter effect analysis of local failure modes for fail-safe topology optimization

Peng, X.-R.

中文

计算力学学报

1007-4708

2019

36

3

317-323

10.7511/jslx20180201001

国家自然科学基金(11672103) 湖南省自然科学基金(2016JJ6016)资助项目.

本校为第一且通讯机构

针对连续体结构,考虑破损-安全拓扑优化中如何处理结构局部破损的关键问题,以位移约束下结构体积极小化拓扑优化问题为例,基于独立连续映射ICM方法,建立了优化模型,给出了求解方法。以单荷载及多荷载工况的数值算例为例,探讨了结构局部破损模式的形状和大小及结构局部破损状况预估分布等对最优结构拓扑的影响。结果表明,(1)相比于不考虑破损-安全的结构拓扑优化,考虑破损-安全得到的最优拓扑具有更多冗余构件及传力路径;(2)不同形状及大小的结构局部破损模式会得到不同的最优结构拓扑;(3)结构局部破损模式布置间距越小,得到的最优拓扑越趋复杂。故在进行考虑破损-安全拓扑优化设计时,宜依据工程...

For the fail-safe topology optimization of continuum structures,aiming at the key problem of handling handle the local failure of a structure,a topology optimization model considering fail-safe is established and solved based on the independent continuous and mapping (ICM) method.The topology optimization problem minimizing structural volume with displacement constraints is taken as an example.The effects of the shape and size of the local failure mode and the pre-estimation distribution of structural failure cases on the optimal structure topo...