CAJ | 학술논문

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。
재분석결구향응공솔보밀도대결구단원강도령민도기출상，제출평은수궤격려작용하결구손상식별신방법。이용수궤진동허의격려법，획득평은수궤격려하결구향응공솔보밀도함수대결구손상삼수적령민도，용유한원모형수정실현결구손상식별。경대전절결구손상식별수치결과표명，해방법부용유한개전감기빈역수거，즉능교호식별결구손상。
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.