【摘要】 以高速铁路道岔数控龙门铣床为研究对象。首先运用SolidWorks软件建立了机床的三维实体模型,然后运用HyperMesh软件建立机床的有限元模型,通过灵敏度分析找到机床结构的关键尺寸,并使用OptiStruct模块对其进行以柔度和固有频率为目标函数的尺寸优化,计算出了机床的最小柔度为5928.78J,最大1阶固有频率为34.87Hz。最后利用折衷规划法将柔度和固有频率组合成新的函数,并对其进行了多目标优化,优化后机床1阶固有频率提高了18.4%,2阶固有频率提高了17.1%,柔度降低了27.2%,质量降低了4.0%,优化效果良好。该优化方法可以为机床的优化提供参考。更多还原

【Abstract】 Taking the high-speed railway turnoutCNC planer milling machine as the research object.Firstly the 3 D model of the machine tool was established by SolidWorks software.Then the finite element model of the machine tool was established through HyperMesh.The key dimensions of machine tool structure were found through sensitivity analysis,and OptiStruct module was used to optimize static stiffness and natural frequency.The minimum flexibility of the machine tool was 5928.78 J and the maximum first-order natural frequency was 34.87 Hz.Finally,the compromise programming method was used to combine the flexibility and natural frequency into a new function,and the multi-objective optimization was carried out.After optimization,the first order natural frequency of the machine tool increased by 18.4%,the second order natural frequency increased by 17.1%,the flexibility decreased by 27.2%,and the quality decreased by 4.0%,the optimization effect was good.This optimization method can provide reference for the optimization of machine tool.更多还原