基于响应面优化法的变速箱壳体结构优化设计

针对某工程用变速箱壳体轻量化问题。基于Solidworks建立其三维模型并联立ANSYS对壳体进行静态分析,得到壳体的应力、变形云图,从而确定壳体危险点的位置及力学变化特性,同时通过第四强度理论对壳体进行强度校核,在保证强度的基础上利用响应面优化法对壳体进行优化设计,通过输入变量与输出变量的灵敏度关系,以壳体质量最小、总变形最小和应力最小为优化目标并建立变速箱壳体结构优化模型,对壳体进行尺寸优化设计,依据有限元响应面优化结果,确定了优化后变速箱壳体模型。优化结果表明,优化后壳体的应力和变形基本没有变化,重量减轻了6.03%,为变速箱壳体结构轻量化设计提供参考。

Structural Optimization Design of Gearbox Shell Based on Response Surface Optimization Method

Aiming at the lightweight problem of gearbox shell used in a project. Based on Solidworks, the three-dimensional model of the shell is established and the static analysis of the shell is carried out in parallel with ANSYS. The stress and deformation nephogram of the shell is obtained, so as to determine the position of the dangerous point of the shell and the mechanical change characteristics. At the same time, the strength of the shell is checked by the fourth strength theory. On the basis of guaranteeing the strength, the shell is optimized by response surface optimization method, and the input variables and output are used. The sensitivity relationship of variables takes the minimum mass, total deformation and stress of the shell as the optimization objective, and establishes the optimization model of the gearbox shell structure, optimizes the size of the shell, and determines the optimized model of the gearbox shell based on the results of finite element response surface optimization. The optimization results show that the stress and deformation of the shell have not changed after optimization, and the weight of the shell has been reduced by 6.03%. This provides a reference for the lightweight design of the gearbox shell structure.