双协调自由界面模态综合方法在框架结构上的应用研究

摘要

Free interface component mode synthesis method is applied in the civil engineering structure. The basic equations of the intro-duced method are first set up, and then the modal cut-off criterion is proposed. Finally, MATLAB is used for simulation in an 11-floor frame structure. The simulation results show that the proposed method can be successfully applied in civil engineering structure. At the same time, it demonstrates the correctness of the proposed modal cut off standard. This study provides necessary theoretical foundation for further research of substructure method on large-scale structures.%本文研究双协调自由界面模态综合方法，并将其运用于土木工程结构中。首先介绍了双协调自由界面模态综合方法的基本思路和公式推导，进而提出了相应的模态截取准则。最后，通过一个11层的框架结构进行数值模拟。数值模拟分析结果验证了双协调自由界面模态综合方法在土木工程结构上应用的可行性，进一步通过算例对比，证明了本文提出的双协调自由界面模态综合方法的模态截取准则的正确性，为今后大型结构子结构研究方法提供了必要的理论基础。