有限元模型修正法在结构动态设计中的应用

The Application of Revisable Method of Finite Element Model to Structure Dynamic Design

提出了一种结构有限元模型的局部修正方法。利用有限元模型的正交条 件 与特征方程建立设计参数修正量与实测模态参数的关系式，将逐次修正的有限元模型来扩 展非测量自由度上的模态振型，通过迭代最终求解设计参数的修正量。并以实例验证了该方 法的有效性。

： This paper presents a local revisable method of structure fini te element model.By making use of ortho－ intersection condition and characteris t ic equation of finite element model, the connection between revisable quantity of design parameter and mode parameter in practical measure is built, the finite element model revised step by step is used to extend vibratory mode in non－ m e asurable degree of freedom, and the revisable quantity of design parameter is ob tained by iterative method at last. A practical example given to show that th e m ethod is effective.