DAMAGE DETECTION BASED ON OPTIMIZED INCOMPLETE MODE SHAPE AND FREQUENCY

查看全文 作　　者：Wei [1]Chen;Wenguang [1]Zhao;Huizhen [1]Yang;Xuquan [1]Chen

机构地区：[1]Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology

出　　处：《Acta Mechanica Solida Sinica》索引2015年第28卷第1期,共9页

基　　金：Project supported by the National Basic Research Program of China(973 Program)(No.2011CB13804) 摘　　要：For the purpose of structural health monitoring, a damage detection method combined with optimum sensor placement is proposed in this paper. The back sequential sensor placement(BSSP) algorithm is introduced to optimize the sensor locations with the aim of maximizing the 2-norm of information matrix, since the EI method is not suitable for optimum sensor placement based on eigenvector sensitivity analysis. Structural damage detection is carried out based on the respective advantages of mode shape and frequency. The optimized incomplete mode shapes yielded from the optimal sensor locations are used to localize structural damage. After the potential damage elements have been preliminarily identified, an iteration scheme is adopted to estimate the damage extent of the potential damage elements based on the changes in the frequency. The effectiveness of this method is demonstrated using a numerical example of a 31-bar truss structure. 关键词：结构损伤检测优化模式频率模态结构健康监测潜在损害传感器灵敏度分析

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DAMAGE DETECTION BASED ON OPTIMIZED INCOMPLETE MODE SHAPE AND FREQUENCY

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