利用测试得到的不完全复模态参数修改结构动力模型

本文提出一种由测试得到的不完全复模态参数修改结构动力模型的方法。该方法不需迭代计算,易于程序化,适用于含有一般粘性阻尼的复杂结构,可以实现对结构分析模型的质量、阻尼和刚度矩阵的最小变化修正,使其特征解与测试结果一致。文中通过一个数值计算例子说明了该方法的有效性。

MODIFYING STRUCTURAL DYNAMIC MODEL USING AN INCOMPLETE SET OF MEASURED COMPLEX MODES

A method is presented in this paper which uses an incomplete set of complex modal parameters identified from the experimental date to modify the structural dynamic model. The method, not requiring iteration and being programed easily,is suitable for the complex structures with general viscous damping in improving the analytical mass, damping and stiffness matrix madel of a structure with a set of minimum changes in the analytical matrics, so as to force the eigensolutions to agree with the test measurement. An example is given to demonstrate the validity of this proposed method.