A novel structure with enhanced energy absorption is proposed by introducing thin-walled tube as the inner liner tube of the cylindrical structures with negative Poisson’s ratio (C-NPR). The energy absorption performances of C-NPR structure with inner tube (C-NPR-IT) are compared to other configurations like the single NPR structure, single thin-walled tube, and C-NPR structure with outer tube (C-NPR-OT) to show its superiority. It is found that the interaction between the NPR structure and inner tube in C-NPR-IT can be enhanced. Then, the parametric analysis of the geometric parameters on the crashworthiness performance of C-NPR-IT structures are performed with finite element method. To achieve the best configuration, the surrogate modeling technique and the multi-objective particle swarm optimization (MOPSO) algorithm are employed to optimize the C-NPR-IT structures. The results show that the optimized structure improves the specific energy absorption (SEA) from 3.97 to 10.26 kJ/kg by almost 2.5× by controlling peak crushing force (PCF) less than 80 kN. Therefore, the C-NPR-IT structure has an application prospective in the energy absorber.

通过引入薄壁管作为负泊松比（C-NPR）圆柱结构的内衬管，提出了一种具有增强能量吸收的新型结构。将带内管的 C-NPR 结构 (C-NPR-IT) 的能量吸收性能与单 NPR 结构、单薄壁管和带外管的 C-NPR 结构 (C-NPR-OT) 的其他配置进行比较)以显示其优越性。发现可以增强C-NPR-IT中NPR结构与内胎之间的相互作用。然后，采用有限元方法对C-NPR-IT结构耐撞性能的几何参数进行参数化分析。为了达到最佳配置，采用代理建模技术和多目标粒子群优化（MOPSO）算法来优化 C-NPR-IT 结构。结果表明，优化后的结构提高了比能量吸收（通过控制峰值破碎力 ( PCF ) 小于 80 kN，SEA ) 从 3.97 到 10.26 kJ/kg 几乎提高了 2.5 倍。因此，C-NPR-IT结构在吸能器中具有应用前景。