中文摘要：

运用有限元软件Ls-dyna对泡沫铝填充金属薄壁圆管受侧向冲击载荷进行了数值仿真分析。通过模拟结果与实验结果的对比,验证了有限元模型的有效性与计算结果的精确性;进而研究了管的几何参数、泡沫铝的密度与冲击速度等因素对其变形与吸能特性的影响。研究结果表明：在侧向冲击载荷作用下泡沫铝填充管的压溃可以分为3个阶段,初始碰撞阶段、塑性变形阶段和密实化阶段;与空管相比,泡沫铝填充管的侧向冲击载荷、总吸能与比吸能显著增大。管的几何尺寸、泡沫铝密度、冲击速度等对泡沫填充管的吸能性能影响较大。当冲击速度超过一定数值时,填充管的变形模式发生改变,由对称变形变为非对称的变形。

英文摘要：

A study of numerical simulation for aluminum foam-filled thin-walled metal tubes under lateral impact loading is performed utilizing the finite element software Ls-dyna.By comparison with the results of numerical simulation and experiment,the validity of the finite element model and the accuracy of the calculation results are verified.Then,the influence on tube deformation and energy absorption properties is investigated,from such factors as geometric parameters of tube,density of aluminum foam and impact velocity.The results reveal that the compression of aluminum foam-filled tubes under lateral impact loading is obtained in three stages,initial collision stage,platform stage and densification stage.Compared with those of hollow tubes,the lateral impact load,energy absorption and specific absorbed energy of foam-filled tubes are all enhanced distinctly.Geometries of tubes,density of aluminum foam and impact velocity all have effects on them to some extent.When the impact velocity exceeds a certain value,the deformation mechanism of foam-filled tubes is changed to asymmetric deformation from symmetry deformation.