不同截面形状的锥形吸能盒吸能特性研究
Research on Energy Absorption Characteristics of Variable Cross-Section En-ergy Absorption Box Based on Differential Thickness Technology

针对锥形吸能盒结构建立有限元模型并对其轴向压溃过程进行有限元模拟。通过比较四种不同截面锥形薄壁管在轴向冲击下的总吸能与平均压跨载荷、最大压垮载荷、比吸能、载荷效率，评价不同截面的吸能效果。结果表明，锥形管在轴向载荷作用下，其变形模式更为稳定。随着截面棱边数量的增加，锥形管的初始峰值载荷、平均压跨载荷和比吸能都不断增加，其中圆形截面最为均衡。
In this paper, the finite element model of conical energy absorbing box is established and its axial collapse process is simulated by finite element method. By comparing the total energy absorption, average span load, maximum collapse load, specific energy absorption and load efficiency of four different sections of thin-walled conical tubes under axial impact, the energy absorption effect of different sections was evaluated. The results show that the deformation mode of conical tube is more stable under axial load. With the increase of the number of section edges, the initial peak load, average compressive span load and specific energy absorption of the conical tube increase, and the circular section is the most balanced.