摘要
在分析结构响应功率谱密度对结构单元刚度灵敏度基础上,提出平稳随机激励作用下结构损伤识别新方法。利用随机振动虚拟激励法,获得平稳随机激励下结构响应功率谱密度函数对结构损伤参数的灵敏度,用有限元模型修正实现结构损伤识别。经对剪切结构损伤识别数值结果表明,该方法仅用有限个传感器频域数据,即能较好识别结构损伤。
Based on the analysis of the sensitivity of structural response power spectral density with respect to the structural stiffness parameter,a new method was proposed to identify structural damages under stationary random excitations. Under stationary random excitations,the sensitivity was analysed using the pseudo excitation method. Then the finite element model updating method was applied to identify structural damages. The numerical example of a shear structure demonstrates the accuracy and efficiency of the proposed method,where only the frequency response data of finite accelerometers are needed.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第16期76-79,共4页
Journal of Vibration and Shock
基金
国家自然科学基金项目(11172333
11272361)
博士后科学基金面上项目(2013M531893)
中央高校基本科研业务费专项资金资助(13lgzd06)
关键词
损伤识别
随机振动
虚拟激励
功率谱
灵敏度分析
damage identification
random vibration
pseudo excitation method
power spectral density
sensitivity analysis
