基于动静测试的融合灵敏度结构损伤识别方法  

Structure damage identification method based on fusion sensitivity with dynamic and static test

作　　者：杨辰[1] 王晓军[2] 邱志平[2] 

机构地区：[1]中国空间技术研究院钱学森空间技术实验室,北京100094 [2]北京航空航天大学固体力学研究所,北京100191

出　　处：《应用力学学报》2013年第5期669-673,799,共5页Chinese Journal of Applied Mechanics

基　　金："十二五民用航天项目;国家自然科学基金(11002013);国防基础科研计划资助(A2120110001;B2120110011);高等学校学科创新引智计划(B07009)

摘　　要：基于静力位移和固有频率灵敏度矩阵,考虑这两种动静测试数据,提出了融合灵敏度结构损伤识别方法。利用位移响应和固有频率分别对全局损伤敏感效应和全部结构振动特性进行整体度量,将这两种不同类型的响应数据融合为一种灵敏度矩阵,提出了融合准则(Damage Identification Fusion Criterion,DIFC)。利用数值算例对本文所提方法进行了验证,并将识别结果与两种单工况下的灵敏度方法计算结果相比较。结果表明:融合灵敏度方法更加灵敏,特别是对于相对较小的损伤,能够较为准确地诊断损伤所在位置及损伤程度大小,误差仅为6.47%。Based on the displacement and frequency sensitivity matrix,a structure damage identification method of fusion sensitivity is presented by using two kinds of dynamic and static test data in this paper.The advantage of the sensitive effects of all structures is taken by using the displacement responses and the whole measurements of structural vibration characteristics,a fusion of two different types of response data in the level of sensitivity is made in this method.A fusion criterion: DIFC(Damage Identification Fusion Criterion) is also proposed.The detailed analysis of the steps of the fusion sensitivity structural damage identification method is given.The proposed approach is demonstrated and compared with the two single load cases sensitivity method in a numerical example: fusion sensitivity method is more sensitivity especially to small damage,and it can identify damage location and level accurately.

关 键 词：损伤识别 灵敏度矩阵 静力位移 固有频率 信息融合 

分 类 号：TH113.1[机械工程—机械设计及理论] O346.5[理学—固体力学]