Abstract Improving the crashworthiness performance of thin-walled tubes is of vital significance for vehicle safety because thin-walled tubes are the most common and economical energy absorption structures. To this end, a new structural design method combining multicorrugation and multicell configurations was proposed in this study. Triangular, circular and square corrugation reinforced multicell tubes (CRMTs) were designed with this method. Finite element simulation validated by quasi-static compression experiments was adopted to investigate the crashworthiness performances of the CRMTs. The integrated entropy TOPSIS method was used to select the best of the proposed tubes. The results showed that the circular CRMT with a 3-order cell number (C-C-3) performed the best of the proposed CRMTs. Then, multiobjective optimization incorporating the integrated entropy TOPSIS method was conducted to search for the optimum geometric parameters of C-C-3. After optimization, the SEA increased by 2.39% and the CFE increased by 7.69%. In conclusion, the design combining the multicorrugation and multicell configurations can dramatically improve the crashworthiness of thin-walled tubes; therefore, the proposed structures can be used for energy absorption in the automobile and train industries.

中文翻译：

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波纹增强多单元管状结构的耐撞性能

摘要 薄壁管是最常见、最经济的吸能结构，提高薄壁管的耐撞性能对车辆安全具有重要意义。为此，本研究提出了一种结合多波纹和多单元配置的新结构设计方法。三角形、圆形和方形波纹增强多单元管 (CRMT) 就是用这种方法设计的。采用通过准静态压缩实验验证的有限元模拟来研究 CRMT 的耐撞性能。综合熵 TOPSIS 方法用于选择最佳的建议管。结果表明，具有 3 阶单元数 (CC-3) 的圆形 CRMT 在建议的 CRMT 中表现最好。然后，结合综合熵 TOPSIS 方法的多目标优化用于搜索 CC-3 的最佳几何参数。优化后，SEA 增长 2.39%，CFE 增长 7.69%。总之，结合多波纹和多单元配置的设计可以显着提高薄壁管的耐撞性；因此，所提出的结构可用于汽车和火车行业的能量吸收。