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考虑气动阻力和横风稳定的汽车车身多目标优化设计

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Indexed by:Journal Papers

Date of Publication:2020-01-01

Journal:汽车安全与节能学报

Volume:11

Issue:1

Page Number:53-60

ISSN No.:1676-8484

Key Words:汽车车身设计;空气动力学;计算流体力学(CFD);多目标优化;响应面模型;遗传算法(GA)

Abstract:综合考虑了气动阻力特性和横风稳定性,对车身外形参数进行了多目标自动优化设计.综合利用参数化建模技术、计算流体力学(CFD)仿真、试验设计方法、响应面模型和智能优化算法,集成Pro/Engineer参数化建模和ICEM网格划分工具以及Fluent仿真软件,在多学科优化平台modeFRONTIER上,搭建了一种自动优化设计流程.利用该流程,基于遗传算法(GA)对MIRA快背式模型车身几何外形进行了改型设计,得到了考虑车身气动阻力特性和横风稳定性的最优权衡设计解集.该结果使得气动阻力因数降低了5.2%,侧向力因数降低了5.8%.因而,实现了车身气动阻力和横风稳定性的多目标优化.

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