增速齿轮箱行星架有限元分析及结构优化

FEA and Structural Optimization of the Planet Carrier of the Speed-increase Gearbox

以轻量化设计为目的,在满足强度和刚度的条件下,对增速齿轮箱的行星架进行结构优化设计。首先运用有限元方法对行星架进行强度和刚度分析,并选择对行星架质量有重要影响的结构尺寸为设计变量;然后利用高端网格变形软件建立行星架的网格参数化模型,进而建立以减轻质量为目标的行星架优化模型。最后结合Isight多学科优化软件进行优化分析,得出了合理的行星架轻量化结构尺寸。对优化后的行星架进行模态分析,其固有频率完全避开了啮合频率,确保不会发生共振现象。

On the purpose of lightweight design,on the condition that it meets the strength and stiffness requirements the designer began to structural optimization of the planet carrier of speed-increase gearbox.First,the analysis of the strength and stiffness of planet carrier is carried out,and then the structure size which posts an important impact on planet carrier is decided as the design variable.Second,using high-end mesh morph software,the parameterized model of grid is established,and then go further,the optimized model of planet carrier on the purpose of decreasing its weight is built.Finally,the optimized analysis is carried out in combination of Isight multidisciplinary optimization software,the reasonable design plan for lightweight of planet carrier is obtained.The modal analysis towards the optimized planet carrier is carried out,and its natural frequency completely avoid meshing frequency,so as to avoid resonance phenomenon.