摘要
本文提出了一种有限元动力学模型的建模误差识别方法。根据建模误差识别,用灵敏度分析方法,选择建模误差大的子结构的结构参数进行修正,可以大大减小结构参数修正的计算量。本文还研究了不完整测试振型扩充方法和测试振型随机误差对计算结果的影响.
This paper presents a method for localization of modelling error of a finite element (FE) model. Based on the localization of modelling errors, the structural parameters of macro-elements with dominant modelling error are selected to be updated by sensitivity analysis, thus the computa-tional effort for correction of structural parameters can be dramatically reduced. The dynamic condensation/expansion method and the global optimization fitting method are used to handle the incomplete test modal data, and the influence of random error of test data is also discussed.
关键词
结构动力学
有限元
建立模型
structural dynamics, finite element, model building, structural dynamics modification
