摘要
对自由度较多的悬臂型结构或剪切型结构 ,由于高阶模态难以得到。鉴于此 ,研究了利用测量稳态柔度矩阵来识别结构损伤的理论方法。对于悬臂结构 ,其柔度与其结构参数间的线性关系 ,直接建立模态与结构损伤参数之间的关系 ,通过解矩阵方程识别损伤参数。此方法所需已知条件少 ,仅需最多三阶模态。应用这种方法便显得很方便。并以悬臂结构的损伤仿真试验 ,验证这一方法的有效性。
For structures as framed structures,with mulitidegree of fredom,it is very difficult to get their high modes.In order to solve the problem,theoretical method of structural damage and fault diagnosis using mesured flexibility marices is presented.Using this method,the structural damage can be directly identified due to the linear relationship between the elements of flexibility matrix and the parameters of structural members.The flexibility method is very appealing for its less demand for modal parameters.Finaly,simulated case is studied on a cantilever structure to illustrate the damage evaluating capability.
出处
《东北电力学院学报》
2004年第1期47-50,共4页
Journal of Northeast China Institute of Electric Power Engineering
