基于SIMP法的机床斜床身拓扑优化设计

Topology Optimization of Slant Bed for Turning Machine Based on SIMP

以某型数控车床斜床身为研究对象,利用SolidWorks软件建立床身的三维模型,并对模型进行了受力分析;在HyperMesh前处理软件建立床身有限元分析模型,利用OptiStruct求解器进行静力分析、模态分析,采用SIMP法对床身进行拓扑优化。研究结果表明,利用拓扑优化设计,可以设计出更合理床身结构布局形式,从而实现轻量化设计。根据优化结果,设计出床身的新方案,将优化方案与原方案性能进行对比。数据表明,新床身方案的质量比原方案减轻了4.3%,床身导轨的变形都有不同程度的下降,前三阶固有频率也均有不同程度的提高,验证了优化方案的可行性。

Taking the slant bed as research object. Firstly, to study its＂ stiffness and strength, a three-dimensional solid model of the bed is established for stress analysis in SolidWorks. Secondly, the finite element analysis model of the bed is established for static analysis and modal analysis. The results show that the static and dynamic performance of the bed does not meet the use re- quirements, so further optimization needs to be conducted. SIMP method of topology technology is utilized to optimize the machine bed. The results show that a more reasonable layout of bed structure can be designed and lightweight design can be realized by us- ing topology optimization. After optimization, a better structure is designed according to the shape of topology result. By comparison of the new design with the original bed, the mass of the new bed scheme has reduced by 4.3%, the deformation of the guide has declined, the first three natural frequencies have also increased to different extent, which verify the feasibility of the optimization program.