以一种新型龙门式混联机床主体机构为研究对象,对该混联机床主体机构的动态特性进行研究.首先运用SolidWorks对其主体机构建立三维实体模型,然后导入到有限元分析软件ANSYS Workbench进行模态分析,得到主体机构的一到六阶固有频率和振型,找出机构运动过程中易发生共振的位置,并且得出混联机床主体机构的各阶固有频率均大于机床的工作频率,验证了机床主体机构设计的合理性.在模态分析的基础上,对该混联机床进行谐响应分析,得出动平台在X,Y,Z轴方向的位移响应曲线,从而验证该混联机床的抗振性能,得出机构应避免的敏感频率,这为该混联机床的进一步动态设计与优化奠定了基础.%Taking the main body of a new type of Longmen hybrid machine tool as the research object,its dynamic characteristics were studied. Firstly the 3D model of the main mechanism was established by Solid-Works software. Then the 3D model was imported into the finite element analysis software ANSYS Work-bench to finish modal analysis, one to six order natural frequency and vibration mode of the main body was got, and the resonance in the process of movement was found easily, and it is concluded that the inherent frequency of the main body of the hybrid machine tool was larger than the working frequency of the machine tool, which verified the rationality of the design of the main body of the machine tool. On the basis of mo-dal analysis, the displacement response curve of platform along X, Y, Z direction was dispatched by harmon-ic response analysis, and the anti vibration performance of the machine was proved, and the sensitive frequen-cy was got that the mechanism should avoid. It laid the foundation for further dynamic design and optimization of the hybrid machine tool.
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