摘要
针对关键零部件结构中一些部位在缺陷对零部件结构的诱变过程中出现过损害现象造成零部件提前报废的问题,提出一种基于sobol缺陷敏感度的结构细节设计分析方法.在关键零部件结构设计的基础上,引入缺陷模型,模拟缺陷对结构的侵袭及迁移过程,以满足结构全局强度为指标,基于sobol缺陷敏感度分析,利用缺陷参数影响零部件结构强度指标程度分离筛选出结构过损害部位,依据较大灵敏度参数选择性的选取优化变量,并利用多目标粒子群算法进行优化,提高零部件结构敏感部位的安全度.算例结果表明所提方法可以有效地改善结构易损部位的应力分布情况,提高零件结构细节抗缺陷的性能.
In order to enhance the availability of the vulnerable area,a new method for optimizing mechanical structure to prevent defect was proposed.An abstract defect model was introduced to present the simple invasion and migration process of defect in the structure.Sobol sensitivity technique was used to study the damage degree of parameters in the defect model based on structural analysis.Then the vulnerable areas were labeled by comparing the damage degree.The sensitive areas were taken the object of anti-defect detail structure optimization.The optimization variables were selected tendentiously based on the parameters with bigger damage degree.Multi-objective particle swarm algorithm was employed to find the optimal distribution of the variables in order to improve the safety of the sensitive areas of structure.Results show that the proposed method improves the defect resistance performance of the vulnerable area.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第8期1487-1494,共8页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(51405435)
国家"973"重点基础研究发展规划项目计划(2011CB706506)
关键词
Sobol敏感度分析
缺陷模型
优化变量
粒子群算法
结构细节设计
sobol sensitivity analysis
defect model
optimization variables
particle swarm optimization algorithm
structural detail design
作者简介
尹娇妹（1990-），女，硕士生，从事空分设备研究．E-mail：yinjiaomeiabc@163．com
赵昕明，女，讲师．Email：zhaoxinyue@zju．edu．cn
