Abstract: The carbon fiber hood was designed for an MPV, and its finite element analysis model was established by HyperMesh. The full-factor DOE experiment design and multi-objective optimization were carried out by Isight, and the optimal sequence of carbon fiber lamination was determined.The simulation results show that, compared with the traditional steel hair hood, the total weight of the hair hood is reduced by 44.9%, and the torsion stiffness of the hair hood is increased by 35%, the lateral stiffness displacement is reduced by 10.6%, the lock hook stiffness displacement is reduced by 27.4%, the gap interval difference is reduced by 55.4%, the wing tip stiffness displacement is reduced by 30.1%, and the first-order constraint mode frequency is increased by 43.3%.

Key words: Carbon fibre composite, Engine cover, Laminate composites, Multi-objective optimization, Light weight

摘要： 文章为某MPV设计了碳纤维发动机罩,通过HyperMesh建立了其有限元分析模型,通过Isight进行全因子DOE实验设计和多目标优化,确定了其最优铺层顺序。仿真分析结果表明：与传统钢制发罩相比,发罩总重量减轻了44.9%,而且,发罩扭转刚度提升了35%,侧向刚度位移减小10.6%,锁钩刚度位移减小27.4%,间隙段差减小55.4%,翼尖刚度位移减小30.1%,一阶约束模态频率提升43.3%。

关键词: 碳纤维复合材料, 发动机罩, 铺层设计, 多目标优化, 轻量化