基于拓扑优化的拼焊板车门焊缝位置布局

Weld Line Location Layout of Tailor Welded Blank Door Based on Topology Optimization

摘要:

提出一种拼焊板(TWB)车门结构焊缝布局拓扑设计方法.考虑多刚度性能要求并采用双向渐进拓扑优化(BESO)算法作为设计蓝本，将传统的针对弹性模量的插值函数转换为厚度插值模型，然后根据不同的刚度工况推导出相应的灵敏度计算公式.结果表明：在厚度和体积分数给定的情况下，材料分布更具聚集性，即不同厚度区域的分界线更加明显；优化后的车门结构仅损失结构刚度的1%，就能降低接近30%的质量.

Abstract:

A topology design method for the weld line location layout optimization of tailor welded blank(TWB) door is proposed in the paper. The multistiffness performance is required and the bidirectional evolutionary structural optimization (BESO) is considered as the basic design algorithm. Thus, the traditional interpolation model with Young’s module is changed into a novel model with thickness property. Finally, the sensitivity equations are derived from different stiffness requirements. The results show that the region boundary of different thicknesses is more obvious and the total weight of optimized door reduces by nearly 30% with only about 1% loss of its stiffness.