结构动特性计算的广义模型物理化方法及应用

大型组合结构动特性计算往往采用子结构模态综合技术。子结构模态综合技术是将大型结构划分多个部件，将部件按照模态坐标展开为广义模型，再将广义模型进行综合，获得整体结构动特性。本文给出一种将部件的广义模型和物理模型直接综合的方法一广义模型物理化方法，并提供了方法在Nastran软件的实现途径。该方法不同于传统的子结构综合方法，能够将广义模型直接按照物理模型看待，从而将广义模型直接和物理模型进行综合，避免了繁琐的模态综合过程，使得对广义模型的理解和使用更加直观。文章晟后给出了广义模型物理化方法的验证算例以及工程应用实例。

The method and application of ungeneralizing the generalized models in solving the dynamic characteristics of the structure

The substructural modal synthesis techniques are frequently used to solve the dynamic characteristics of the large complex structure. In the substructural modal synthesis techniques, the large structure is divided to several substruc~xes, the physical models in terms of the physical coordinate are converted to generalized ones in terms of the modal coordinate, and the generalized models are synthesized to result in the dynamic characteristics of the global structure. In this paper, the method called as the method of ungeneralizing the generalized models, by which, the dynamic characteristics of the global structure is resulted from the synthesis of the physical model and the generalized ones is proposed. In contrary to the traditional modal synthesis, by this method the generalized models can be considered as the physical models, so that the generalized models can be synthesized directly with the physical models, the complex modalsynthesis process is avoided, and the generalized models are easily understand. At last, a validation example and an application example of the method of the un-generalizing the generalized models is illustrated in this paper.