Che Quanwei, Xu Ping, Li Zhixiang, Ma Wen, Yao Shuguang
Key Laboratory of Traffic Safety on Track (Central South University) Ministry of Education, Changsha, China.
Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, China.
Sci Prog. 2020 Jul-Sep;103(3):36850420950158. doi: 10.1177/0036850420950158.
This paper proposed a multi-layered bi-directionally corrugated plates structure (BCPS) for energy absorption. Quasi-static compression experiments and finite element method (FEM) were used to investigate the crushing performance of the multi-layered BCPS. The results showed that the multi-layered BCPS had very small initial peak crushing force, and the fluctuation of force was very small during the whole compression process. These characteristics made the multi-layered BCPS more advantageous in crashworthiness than traditional structures. It was also found that the crushing performance of the multi-layered BCPS was very sensitive to the geometrical parameters, such as the number of the cellular structures along the width , the number of plates , and the ratio of width of small square to width of big square of the pyramid cell . Therefore, parameters optimization was carried out using the Multi-Objective Genetic Algorithm to find the best geometrical configuration of the structure. After optimization, the optimum parameters = 5, = 11 and = 0.38 was obtained. The specific energy absorption increased by 143.76% compared with the initial configuration.
本文提出了一种用于能量吸收的多层双向波纹板结构（BCPS）。采用准静态压缩实验和有限元方法（FEM）来研究多层BCPS的压缩性能。结果表明，多层BCPS具有非常小的初始峰值压缩力，并且在整个压缩过程中力的波动非常小。这些特性使得多层BCPS在防撞性能方面比传统结构更具优势。还发现多层BCPS的压缩性能对几何参数非常敏感，例如沿宽度方向的蜂窝结构数量、板的数量以及金字塔单元中小正方形宽度与大正方形宽度的比值。因此，使用多目标遗传算法进行参数优化以找到结构的最佳几何构型。优化后，得到了最佳参数 = 5、 = 11和 = 0.38。与初始构型相比，比能量吸收提高了143.76%。
