机床在工作时,由于要承受各种变载荷而产生振动,其精度和寿命会受到影响,因此有必要对机床进行模态分析,了解其动态特性,以便进一步分析和改进。采用3d建模软件对机床进行建模和装配,将得到的模型导入HyPErMESH建立有限元模型,再将有限元模型导入AnSyS进行模态分析,得到机床在两种工作情况下的固有频率和振型。最后根据模态分析结果对机床立柱进行优化,得出优化结构。When the machine tool is in operation,it will undergo a variety of dynamic loads which as a consequence incur vibrations and degrade machining precision.Therefore,modal analysis is highly demanded to gain an insight into the dynamics of machining system and direct further analysis and optimization.In such a circumstance a corresponding machine tool is established via 3D CAD software and subsequently preprocessed by HYPERMESH.The finite element model produced by HYPERMESH is eventually analyzed by ANSYS to receive the natural frequencies and mode shapes of the target machine tool.An optimization design of the column of the target machine tool is thus developed based upon the modal information.国家自然科学基金资助项目(70772093);福建省高等学校新世纪优秀人才支持计划资助项目;厦门市科技计划项目(3502Z20090003
