In the process of the actual production,the most important objective is to guarantee the machining accuracy of machine tool equipment.Column is the main machine part.In case of guarantee the machining accuracy,it is very necessary to reduce weight and manufacturing cost of column.The machining accuracy influenced by column is decided by its dynamic and static property directly.The analysis was proceeded with the method of the combination of sensitivity analysis and optimum structural design,and the optimal objectives are keeping the dynamic and static performances of the column and reducing its weight.And some more sensitive parameters were founded.Due to more optimization goals and more optimization parameters,the amount of calculation was increased significantly.Calculation and analysis were proceeded with Monte-Carlo method which is less effected by the problem condition and has strong conformability.Analysis results show that the static and dynamic performances can be kept almost invariant,and its quality is decreased obviously.Optimization analysis results show that the method can find sensitive parameters quickly and efficiently,it is effective to control the static,dynamic performances and reduce the quality of the column.%保证机床设备的加工精度是实际生产过程中最为重要的目标.立柱作为机床主要零部件,在保证加工精度的情况下,减轻立柱自身重量,降低制造成本也是必要的.立柱的静、动态性能直接决定着立柱结构影响的加工精度.采用灵敏度分析和结构优化设计相结合的方法,以某型号加工中心立柱的静、动态性能不降低,立柱自身质量减轻为优化目标进行分析,同时找到立柱结构中较敏感的若干参数.由于优化目标和优化参数较多,导致计算量大幅增加,所以采用受问题条件限制的影响较小、适应性能强的蒙特卡罗法进行计算分析.分析结果显示,立柱结构的静、动态性能保持基本不变,自身质量明显降低.优化分析结果表明,灵敏度分析和结构优化设计相结合的方法能快速有效的找到敏感参数,对于控制静、动态性能,降低立柱质量是很有效的.
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