基于加速度频率响应函数的结构损伤测量方法研究  

STRUCTURAL DAMAGE DETECTION METHOD BASED ON ACCELERATION FREQUENCY RESPONSE FUNCTION

作　　者：杨海峰[1] 吴子燕[1] 吴丹[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710072

出　　处：《振动与冲击》2007年第2期90-92,97,共4页Journal of Vibration and Shock

摘　　要：提出了一种利用加速度频响函数对结构的损伤进行定位和定量分析的方法,该方法分别利用试验测量和模型计算所得的加速度频响函数对动力学模型的刚度矩阵、质量矩阵、阻尼系数进行修正,使修正后模型的加速度频响函数与试验测量所得的相一致,利用其修正的差值即可对结构的损伤进行定位和定量分析。该法具有明确的物理意义,避免了模态分析,便于形成实时监测系统。数值算例检验了方法的有效性和精度。A method to measure the location and degree of structural damage based on acceleration frequency response function is presented.The method can refine dynamic model's stiffness matrix,mass matrix and damping matrix by comparing the acceleration frequency response functions extracted from test data with those calculated from analytical mode1.The analytical model is successively updated until its acceleration frequency response functions can be enough close to those measured.Then,the location and degree of structural damage can be found through the deviation.The method has definite physical meaning,avoids modal analysis,and can be fused in on-line monitor system.One numerical example checks the method's validity and precision.

关 键 词：健康监测 损伤测量 频响函数 模型修正 

分 类 号：O32[理学—一般力学与力学基础]