基于高强钢与材料填充的白车身耐撞性轻量化设计

CRASHWORTHINESS AND LIGHT WEIGHT DESIGN OF BODY IN WHITE BASED ON HIGH STRENGTH STEEL AND FILLING MATERIALS

车身结构在碰撞中承担着变形吸能、传递碰撞力以及维持生存空间的作用,基于耐撞性前提下的白车身轻量化设计,有助于提高车辆动力性与燃油经济性,降低排放。将车身结构碰撞形式分解为轴向压溃与横向弯曲两种工况,通过研究不同等级高强钢板与不同类型材料填充组合结构在两种工况下的吸能与抗弯性能,得到针对安全部件与模块的优化结论。将这些结论应用于某量产SUV车身,仿真分析表明该方法不仅提升了车身耐撞性能,同时降低了白车身质量,实现了车身的耐撞性与轻量化设计。

Structure of vehicle body is designed to absorb kinetic energy,transform impact force and keep survival space during crash. Light weight design of BIWcan realize better power performance and fuel economy,decrease exhaust emission. In this paper,collision of vehicle body structure is decomposed into axial crushing and transverse bending. Thin walled structure’s ability inenergy absorption and bending resistanceis researched,which is based on high strength steel and different filling materials. After applied the research conclusion in a SUV’s body optimization,the crash simulation result shows that it improved passive safety and reduced body weight effectively.