车用吸能部件吸能特性的改进

Capacity enhancement of impact energy-absorbing member of vehicle

为了改进汽车上吸能部件的吸能特性,提高汽车正面抗撞性,对常用的圆形截面和矩形截面吸能部件的变形模式和轴向压皱刚度的特性进行了研究;利用拓扑优化的方法,从调整吸能部件轴向压皱刚度观点出发,建立拓扑优化模型进行优化分析。在上述研究的基础上,提出一种新型的碰撞吸能部件,该吸能部件侧壁上沿轴向方向布置了中凹凹槽。有限元分析结果表明:在不增加部件质量、不占用更大空间的条件下,该新型吸能部件具有良好的变形模式,在变形吸能的过程中能够提供较为平稳的轴向反作用力;与圆形截面和矩形截面吸能部件相比,新吸能部件吸收冲击能量的能力显著提高。

To enhancing the energy-absorbing capacity of the impact energy-absorbing component of the vehicle and to improve the vehicle frontal crashworthiness,the deformation modes and axial crush stiffness of the energy-absorbing component with common round and rectangular cross-sections were studied.Using the method of topological optimization,by means of adjusting the axial crush stiffness of the component,a topological optimization model was built to perform the optimization analysis.Based on the obtained result...