面向风电齿轮箱轻量化的双壁整体式行星架的结构优化设计

Structure Optimal Design of Double-wall-integral Planet Carrier for Wind Turbine Gearbox Lightweight

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。

A planet carrier with double - walls - integral structural is optimized and designed for lightening its weight and improving its strength and stiffness. Firstly, a parametric model for the planet carrier is established by means of APDL language, the meshing stiffness between the internal and external gear pairs and support stifthess of＂ bearing are calculated and then the carrier strength and structure parameter sensitivity is analyzed. Secondly, a mathe- matical model of the topology optimization for the planet carrier is established, in which the minimum compliance is as the objective function, the density of the material as a design variable and the volume fraction as constraints condition. Finally, the structure topology optimization for the planet carrier is conducted using Hyperworks analysis platform. Based on the material distribution, the conceptual model is obtained, from that the optimal structural of the planet car- rier is designed. Comparing the performance of the new design one with the original, it is shown that the stress ampli- tude is reduced to 8.74%, the weight to 17.34%, while the stiffness stays invariable. The purposed of the optimiza- tion design is achieved.