摘要
文章基于更换轻质材料(铝合金),并结合多目标优化对发动机罩进行轻量化。对发动机罩的扭转刚度、弯曲刚度、强度、模态、行人保护性能进行了分析。以刚强度及模态性能为约束,行人保护性能和发罩质量为目标,在Isight软件中搭建多目标优化流程,经过NSGA-Ⅱ算法迭代优化得到最优解。结果表明:优化后的发罩相比原发动机罩,刚度性能与行人保护性能有小幅提升,质量减轻39.85%,达到了很好的轻量化效果。该方法可为发动机罩轻量化设计提供一定的参考。
The paper is based on replacing lightweight material(aluminum alloy)and combined with multi-objective optimization.The torsional stiffness,bending stiffness,strength,mode and pedestrian protection performance are analyzed.With stiffness strength and modal performance as the constraint,pedestrian protection performance and hood quality as the goal,a multi-objective optimization process is built in Isight software,and the optimal solution is obtained through iterative optimization of the NSGA-H algorithm.The results show that compared with the original hood,the optimized hood was slightly improved with pedestrian protection performance,and the quality was reduced by 39.85%,which achieved a good lightweight effect.The method can provide some reference for lightweight design of engine hood.
作者
段锦程
DUAN Jincheng(Key Laboratory of the Ministry of Education of Advanced Manufacturing Technology of Automobile Parts,Chongqing University of Technology,Chongqing 400054)
出处
《汽车实用技术》
2021年第22期68-71,共4页
Automobile Applied Technology
关键词
发动机罩
轻量化
铝合金
多目标优化
行人保护
Engine hood
Lightweight
Aluminium alloy
Multi objective optimization
Pedestrian protection