采用新型损伤指示因子和结构优化方法的单元损伤识别  

Structural element damage identification by new indicator and structural optimization

作　　者：赵红兵[1] 孙国[2] 顾元宪[2] 

机构地区：[1]河南省焦作市建设委员会,焦作454002 [2]大连理工大学工程力学系工业装备结构分析国家重点实验室,大连116024

出　　处：《计算力学学报》2006年第5期573-576,共4页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(10032030;10228206);国家重点基础研究专项经费(G1999032805)资助项目

摘　　要：在一种新型的损伤指示因子的基础上,采用最小二乘法建立损伤识别问题的优化模型,通过模态综合方法计算结构模态的灵敏度,采用半解析法计算指示因子对损伤参数的灵敏度,最终由序列线性规划方法求解优化问题。数值算例验证了本文方法的可行性。In this paper, an optimal mathematical model for structural element damage identification problem is constructed by using the least square algorithm based on a new indicator. In sensitivity analysis, the sensitivity of structural vibration modes is carried out by the employment of the method of mode synthesis and the sensitivity of damage indicator is performed by the semi-analytical algorithm. And then the sequential linear programming method is employed to solve the optimal model. Numerical examples are presented to validate the applicability of the methods.

关 键 词：损伤识别 损伤指示因子 灵敏度分析 优化方法 

分 类 号：O342[理学—固体力学] O346.5[理学—力学]