轴向压缩下波纹多胞管的吸能性能

Metal thin-walled tubes are widely used in vehicles as energy absorption structures. Improving the energy absorption characteristics of thin-walled tubes is of great significance for enhancing the passive safety of transportation vehicles. In this paper, a combination of multi-corner and multi-cell structures of single and double corrugated multi-cell tubes were proposed. The influence of corrugation amplitude and corrugation number on the energy absorption characteristics of the corrugated multi-cell tube were studied by numerical method. It was found that the energy absorption of the corrugated multi-cell tube is improved compared with that of traditional square multi-cell tube. In addition, the double corrugated multi-cell tube has a more stable deformation and a higher energy absorption than the single corrugated multi-cell tube. Finally, the optimal structure was selected to study the influence of rib position and node reinforcement. The results show that the edge-to-edge connection has the best energy absorption characteristics, and the node reinforcement at the rib could further improve the energy absorption of the double corrugated multi-cell tube. Compared to traditional square multi-cell tube, the energy absorption of node-strengthened double corrugated multi-cell tube increases by 88.17%, and the crushing force efficiency increases by 65.91%. The node-strengthened double corrugated multi-cell tube has better energy absorption characteristics than traditional square multi-cell tube, leading to broad application prospects as crashworthiness structures.