摘要
提出了一种利用复模态测量数据同时修正有限元阻尼与刚度矩阵的有效方法。借助于矩阵的奇异值分解得到了满足动力方程的最小修正矩阵。该方法有一个简洁的表达式,修正过程简单而且容易实现,数值试验表明修改后的结构参数能准确地同试验值吻合。
An efficient numerical method for updating the damping and stiffness matrices simultaneously using a few of measured complex modal data was developed. By applying the singular value decomposition, the optimally corrected damping and stiffness matrices that satisfy the equation of motion were found through the use of a weighted Frobenius norm. The model updating method is direct and the updating process is simple. Numerical results show that the presented method can be used to update the finite element model to get better agreement between analytical and experimental modal parameters.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第8期117-120,共4页
Journal of Vibration and Shock
基金
江苏省高校自然科学研究计划性项目(2005SL001J)
关键词
有限元模型
阻尼结构系统
模型修正
模态数据
finite element model
damped structural system
model updating
modal data
