一种结构的动态特性计算方法及应用研究

摘要

将有限元技术与模态综合理论相结合，研制 了一套完整的用动态子结构法进行动态特性计算与研究的程序系统，为工程实际提供了一套 实用性和通用性较强的计算软件。在微机上将双协调自由界面模态综合法应用于航空齿轮动 态特性的研究，为结构动力修改或其它需要总刚阵及总质量阵的动态工程计算寻求了一种有 效途径。%In this paper, using the finite-element method and the modal synthesis theory, a programming system, which can analyze the dynamic property by means of the method of substructure coupling for dynamic analysis, is developed on a microcomputer. The frequencies and modals are generated by the method of substructure coupling of two harmonic free-interface. This method is firstly used on the dynamic analysis of the gear with the microcomputer. This is the basic step of structural dynamic modification or the others' dynamic computation in engineering using the installed stiff and mass matrix. The result shows that the system is reliable.