摘要
提出一种基于残余力向量理论的桁架结构损伤直接识别方法。先由灵敏度分析,求出结构刚度联系矩阵,再由刚度联系矩阵将损伤后的刚度摄动矩阵展开成对角矩阵,代入残余力向量方程,得到由刚度联系矩阵表示的新残余力向量方程,经过整理,此方程可以直接求解,即可得到各杆件刚度的损伤量,由此可识别出桁架结构的损伤杆件及其损伤程度。最后以一桁架结构模型进行数值仿真分析。结果表明,该方法具有计算简单,计算量小等优点,仅需损伤后第一阶模态参数,就能够准确识别出结构的损伤情况,证实了该方法的有效性。
A direct damaged identification method of the truss structures based on the theory of the residual force vector is proposed.The stiffness connectivity matrix of the truss structures is obtained by the sensitivity analysis,the stiffness matrix perturbation of the damaged structure can be expanded by the stiffness connectivity matrix,then substituting it into the residual force vector equation,a new residual force vector equation expressed by the stiffness connectivity matrix is obtained,after arranging,this ...
出处
《广西工学院学报》
CAS
2009年第1期31-34,47,共5页
Journal of Guangxi University of Technology
基金
广西工学院自然科学基金项目(院科自0704217)资助
关键词
灵敏度分析
残余力向量
刚度联系矩阵
损伤识别
sensitivity analysis
residual force vector
stiffness connectivity matrix
damage identification
