利用试验模态参数修正有限元模型的再正交拉哥朗日乘子法

A Re-orthogonal Lagrangian Multiplier Technique to Update Finite Element Model Through Identified Modal Parameters

本文给出了一种利用试验模态参数来优化有限元动态模型的再正交拉哥朗日乘子法,即首先利用先验测试信息来优化初始分析模型,然后以优化模型得出的特征向量和测试频率再次作为先验模态信息来优化前次优化的模型。文末将此方法应用开工程结构的实际优化得到了满意的结果。

A Re-orthogonal Lagrangian Multiplier Technique to update finite element(FE) mathematical model based on test identified modal parameters is presentedin this paper,The test obtained modal parameters are adopted firstly to adjustanalytical FE models and then the identified modal frequencies and eigenvectorfrom adjusted model are used as puiori information to further modify the models.Applications of the technique to engineering structures show that satisfactoryresults have been obtained.