仿虾螯结构薄壁管设计及耐撞性分析

为提高薄壁管的耐撞性能，以虾螯为生物原型，通过结构仿生原理设计了仿虾螯结构多晶胞薄壁管。以晶胞数（2～6）和冲击角度（0°、10°、20°、30°）为试验因素，利用有限元法分析了仿虾螯结构多晶胞薄壁管在不同冲击角度下的耐撞性能，通过落锤试验验证了仿真结果的可靠性。结果表明:2晶胞仿生管在轴向和斜向载荷下的耐撞性最优。同工况条件下，减少晶胞数可降低仿生管峰值载荷。斜向冲击载荷下，仿生管保持稳定叠缩变形模式的时间随晶胞数的增加而缩短，其耐撞性能随晶胞数的增加而降低。虾螯结构特征与普通圆管的结合有效提高了仿虾螯结构多晶胞薄壁管的耐撞性能。

Design and crashworthiness analysis of thin-walled tubes based on a shrimp chela structure

In order to improve the crashworthiness of thin-walled tubes, the multi-cell bionic thin-walled tubes based on a shrimp chela structure were designed by the principle of structural bionics. By taking the cell number (2?6) and the impact angle (0°, 10°, 20°, 30°) as experimental factors, the finite element method was used to simulate the crashworthiness of the bionic tubes, the reliability of the results by the simulation test was verified by the drop-weight tests. The results show that the two-cell bionic tube has the best crashworthiness under axial and oblique loads. Under the same working conditions, the reduction of the number of unit cells can reduce the peak loads of the bionic tubes. Under the oblique impact load, the time for the bionic tubes to maintain the stable collapse deformation mode is shortened with the increase of the number of the cells, and the crashworthiness of the bionic tubes decreases with the increase of the number of the cells. The combination of a shrimp cheek structure and an ordinary circular tube effectively improves the crashworthiness of the designed structures. So it can provide a reference for the design of energy-absorbing components in vehicles.