基于WYD方法的自由界面模态综合法及其应用

提出了用ＷＹＤ方法获取子结构的保留主模态，推导了３个子结构的自由界面模态综合法。计算了某车辆模型的固有频率，并与实验结果做了比较，结果表明，基于ＷＹＤ方法的自由界面模态综合法不仅具有较高的综合效率，且计算算精度也能满足工程要求。

A Free-Interface Method for Mode Synthesis Based on WYD and Its Application

Fine-interface mode synthesis method is a very effective Method for the dynamic analysis of large complex structures. However , the common subspace iterative method is inefficient when the reserved modes of a larger substructure is abstracted. In this paper the reserved modes of substructures are acquired with the help of WYD, and a method for the synthesis of the fine-interface mode of substructures is deduced.The paper then identifies the eignvalues of a given vehicle, and compares them with test results. The results show that the fine-interface mode method of synthesis based on WYD not only has a higher efficiency, but also a reliable precision.