复合材料汽车前纵梁的轻量化设计分析

Analysis on Composite Materials in Lightweight Design of Vehicle Front Longitudinal Beam

为了满足汽车节能减排及车身轻量化的需求,文章分析了某高强复合材料在某国产C级轿车前纵梁上的轻量化应用,通过建立整车及白车身的CAE仿真分析模型,分析、对比了复合材料前纵梁加强板和钢质前纵梁加强板对汽车碰撞安全、刚度及模态等性能的不同影响。分析结果表明,用复合材料的前纵梁加强板代替钢质前纵梁加强板可满足车身碰撞安全、刚度及模态等性能要求,且减重3.94 kg,为复合材料在车身轻量化领域的应用提供了有效的指导和参考。

In order to meet the requirements of energy-saving, emission reduction and body lightweight, this paper introduces the lightweight application of high strength composite materials in domestic made front longitudinal beam of C-class sedan. By establishing CAE simulation models of body-in-white and complete vehicle, the influence of both composite and steel front longitudinal beam reinforcing plates are analyzed on vehicle performances, including vehicle＇s crash safety, stiffness and modal. The resuhs show that composite front longitudinal beam reinforced plate can meet the requirements of vehicle＇s crash safety, stiffness and modal performace instead of steel front longitudinal beam reinforced plate, while its weight reduces 3.94 kg, providing vital guidance for the application of composite materials in the vehicle＇s lightweight design.