基于ANSYS的桁架结构模态分析

摘要

模态分析是机械结构动力学分析的基础.采用有限单元法,利用ANSYS软件以桁架结构为例进行分析,求得桁架的自由模态参数,并通过加强筋的合理布置,增强桁架的结构刚度,提升固有频率,远离实际工作频率以防止共振.%Modal analysis is the foundation of dynamic analysis. The finite element method is analyzed by using ANSYS software taking truss structure as a example. It would provide modal parameter like natural frequency, and we can get a better design according to the parameter, like enhancing the rigidity of truss structure and improve the natural frequency to avoid resonating.