目的 研究截面构型及几何参数对泡沫铝夹芯双管结构在横向载荷作用下变形失效机制和吸能性能的影响。方法 运用有限元软件Abaqus/Explicit对泡沫铝夹芯双管构件受横向载荷作用进行数值仿真分析。结果 泡沫铝夹芯双管构件在横向压缩过程中表现出3个阶段:初始压缩阶段、塑性变形阶段和致密化阶段，并发现外方内圆双管夹芯结构的耐撞性能显著强于双方管夹芯结构。随着外管径的增大、内管径的减小，外方内圆双管夹芯结构的承载力和吸能能力越高;内管壁厚的增加使外方内圆双管夹芯结构的能量吸收、比吸能、平均压溃载荷和压溃力效率均表现出增大趋势。结论 泡沫铝芯材的变形失效模式受内管截面形状的影响，与传统双方管夹芯结构相比，外方内圆双管夹芯结构是一种更优秀的吸能构件，在横向碰撞安全防护中展现出更大的应用潜力。通过增加内外管间距和内管壁厚，可以提高外方内圆双管夹芯结构的吸能性能。

The work aims to study the effects of section configuration and geometric parameters on the deformation mechanism and energy absorption performance of aluminum foam sandwiched double-tube under transverse load. Finite element software Abaqus/Explicit was used to carry out numerical simulation on the aluminum foam sandwiched double-tube under transverse load. The aluminum foam sandwiched double-tube exhibited three stages in the process of transverse compression, namely, the initial compression stage, the plastic deformation stage, and the densification stage. It was also found that the crashworthiness of a novel aluminum foam sandwiched double-tube, comprised of square outer and circular inner tubes, was significantly stronger than that of the double square tube structure. As the outer tube diameter increased and the inner tube diameter decreased, the load-bearing capacity and energy absorption capacity of the novel aluminum foam sandwiched double-tube increased. The increase in wall thickness of the inner tube resulted in an increasing trend in energy absorption, specific energy absorption, average crushing load, and crushing force efficiency. The deformation failure mode of aluminum foam core material is affected by the section shape of the inner tube. Compared with the traditional double square tube structure, the novel sandwiched double-tube is a better energy-absorbing component, which shows greater application potential in the safety protection of lateral collision. By increasing the distance between the inner and outer tubes and the wall thickness of the inner tube, the energy absorption performance of the novel sandwiched double-tube can be improved.