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应用Soildworks建立高效立式加工中心立柱数字化模型,运用Simulation对立柱进行有限元分析,获得立柱的静、动态特性参数。综合运用正交试验设计、模糊数学和有限元分析理论,对立柱的结构参数进行多目标模糊优化,获得最优结构参数为壁厚22 mm、肋板厚18 mm、顶部开窗大小140 mm×320 mm。分析表明,优化后立柱位移减小6%,1阶固有频率增加1.2%。通过对立柱结构参数的优化,提高了其静、动态特性。
The high-efficiency vertical machining center column digital model was established by using Soildworks, the finite element analysis of the column was carried out by using the simulation, and the static and dynamic parameters of the column were obtained. Using the orthogonal experiment design, fuzzy mathematics and finite element analysis theory, the structural parameters of the column were optimized by multi-objective fuzzy optimization. The optimal structural parameters were wall thickness of 22 mm, rib thickness of 18 mm and top window size of 140 mm × 320 mm. The analysis shows that the column displacement is reduced by 6% and the natural frequency of the first order is increased by 1.2%. Through the optimization of the structural parameters of the column, the static and dynamic characteristics are improved.