汽车前纵梁的拼焊板轻量化设计研究

在已有车型基础上研究了利用拼焊板进行前纵梁改进的轻量化设计方法，达到了在满足强度和刚度条件基础上减轻汽车重量和改善碰撞性能的目的。通过CAE解析了汽车在自重工况下的前纵梁应力分布，确定了前纵梁的分块数目及焊缝布置，推导了由拼焊板替换的车身梁结构的强度、弯曲刚度和扭转刚度的约束方程，并以此计算拼焊板前纵梁的厚度。整车碰撞仿真证明，拼焊板设计后的前纵梁具有更好的耐撞性，并且达到了减重17.7%的效果。

Lightweight Design Study of Automotive Front Rail with TWB Structure

A method of redesigning the front rail using tailor-welded blanks was studied,in order to reduce the weight of front rail and enhance its crashworthiness on conditions of satisfying strength and stiffness requirements.By CAE analysis of stress distribution in the rail in the case of self-weight, the number of parent sheets and weld line distribution were determined.By establishing the constraint inequalities of strength,bending stiffness and torsion stiffness,the thickness determination was performed.The full-width frontal impact simulation of the whole car after redesign in the front side rails shows that the front rail of tailor-welded blanks has a better crashworthiness in comparison of original design,while it has a lightweight effect of 17.7%.