基于拓扑优化方法的大兆瓦级风机主机架设计及应用

Application of SIMP Method in the Design of Megawatt-Level Wind Turbine Mainframe

本文针对某大兆瓦海上风力发电机组主机架,在考虑强度约束条件的情况下,采用基于固体各向同性材料惩罚模型(SIMP)的拓扑优化方法,首先开展质量最小化设计,并进一步针对壁厚尺寸约束、制造工艺约束实现了对优化模型的几何重构。相比主机架的原始模型,重构模型具有更优的传力路径,可实现减重5.0吨,可设计域减重比为25.4%,材料用量由4.4t/MW降低为3.9t/MW。该优化设计思路改善了传统经验设计方法的局限性,大大提升了设计空间。

In this paper,for the mainframe of a megawatt-level offshore wind turbine,the topological optimization method of Solid Isotropic Material with Penalization(SIMP)is used to carry out the quality minimization design under the condition of considering the strength constraints.Furthermore,the geometric reconstruction of the optimized model is realized according to the limitations on wall thickness size and manufacturing process.Compared with the original model,the reconstructed model has a better force transfer path and can achieve a weight loss of 5.0 tons(the weight loss ratio of the design domain is 25.4%).The material consumption is reduced from 4.4t/MW to 3.9t/MW.This optimization design idea improves the limitation of the traditional experience design method,dramatically enhances the design space.