自卸车箱的结构分析及尺寸优化

Structural analysis and size optimization of self- dumping truck body

首先对某自卸车箱进行了静态刚强度分析,车箱整体变形较小且强度满足要求。之后以整体质量最小为目标,以静刚强度不弱于原设计为约束条件,以车箱各部件厚度为优化变量对其进行尺寸优化。优化结果表明,经过8轮迭代后得到了收敛解,优化后的车箱质量显著降低,较原设计减少了6.9%,且箱体刚度提高,最大应力有所降低。

Static stiffness and strength analysis of a certain type of self-dumping truck body is conducted with finite element method. The overall deformation and stress magnitude is acceptable.On the precondition that stiffness and strength won＇t get worse size optimization,in which thickness of components is taken as design variables,is applied to find weight-saving solution of truck body design. The result indicates that the mass of the optimized truck body reduces by 6. 9%. With the stiffness of truck body improved maximum stress also decreases.