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以轻量化设计为目的,在提高强度和保证刚度的条件下对双壁整体式行星架进行结构优化设计。首先基于APDL语言进行行星架参数化建模,计算齿轮的内、外啮合刚度和轴承支承刚度,对行星架进行有限元强度分析,并对行星架的部分结构参数进行灵敏度分析;然后以行星架的柔度最小为目标函数,材料密度为设计变量,体积分数为约束条件,建立拓扑优化数学模型;最后应用Hyperworks软件对其进行拓扑优化,根据材料分布建立行星架的概念模型,并进行结构设计。对优化前后行星架的性能进行比较,结果表明,在应力降低了8.74%的情况下,质量减少了17.34%,刚度基本不变,达到了优化设计的目的。
For the purpose of lightweight design, the double-wall monolithic carrier is structurally optimized and designed under the condition of increasing the strength and ensuring the rigidity. Firstly, based on the APDL language, parametric modeling of the planet carrier is carried out to calculate the internal and external meshing stiffness of the gear and bearing support stiffness. The strength of the planet carrier is analyzed by finite element method, and sensitivity analysis is carried out on some structural parameters of the planet carrier. The minimum of flexibility as the objective function, the material density as the design variable, the volume fraction as the constraint conditions, the establishment of topology optimization mathematical model; Finally, using Hyperworks software to optimize its topology, according to the material distribution to establish a conceptual model of the planet carrier, and structural design . The performance of the planet carrier before and after the optimization is compared. The results show that the quality is reduced by 17.34% with the stress reduced by 8.74%, and the stiffness is basically unchanged, which achieves the goal of optimal design.