广义逆特征值方法在动力模型修正中的应用

APPLICATION OF A GENERALIZED INVERSE EIGENVALUE ALGORITHM FOR DYNAMIC MODEL UPDATING

本文针对土木工程中理论计算的要求和特点,基于逆特征值理论给出了一种适合有限元动力模型修正的广义逆特征值方法,该方法在给出修正解的表达式基础上,要求修正解满足动力模型的力学特征,且仅需要少量试验数据,是一种简单、实用的有限元模型修正方法。

Based on the theory of inverse eigenvalue problem, a method for updating finite element model,which is in accordance with the peculialities and requirements in civil engineering, is presented in the paper. This method gives expression of updated models in which mechanical natures are maintained. This is a simple and valid method with less test data required.