基于曲率模态的结构损伤识别方法的缺陷分析及其改进  

Defect analysis and improvement of structural damage location identification method based on curvature mode

作　　者：常军[1] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《西安建筑科技大学学报（自然科学版）》2013年第4期515-519,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：江苏省自然科学基金项目:BK2007549;建设部研究开发项目:2008-K2-35

摘　　要：针对于曲率模态方法识别结构损伤状况在实际应用中的不足,特别是多点损伤位置识别效果的不理想,对曲率模态方法进行了改进.通过在曲率模方法中引入频率的影响,建立结构损伤位置识别指标.采用改进前后的曲率模态方法对一多点损伤的简支梁数值模型进行对比研究,结果表明改进后的曲率模态方法的识别准确率达100%,比传统曲率模态方法的识别效果要好得多.改进的曲率模态方法可作为结构健康监测和结构状态评估的依据,可直接应用于实际工程中.In order to overcome the defects of curvature mode in identifying structural damage condition in practical applications, an improved curvature mode for identification of structural damage location is presented. The basic idea of the improvement is to introduce frequency to the curvature mode identification of structural damage location and building up a structural damage identification indicator. A numerical case of a simple support beam with multiple damages is used to compare the result of the traditional curvature mode method and the improved method. The results show that the curvature mode identification method is less effective, while the identification accuracy of improved method presented herein can reach 100%. The improved curvature mode method can be used as the basis for structural health monitoring and structural assessment, and can be directly applied to actual engineering.

关 键 词：损伤识别 频率 曲率模态 损伤定位 缺陷分析 

分 类 号：TU399[建筑科学—结构工程]