吸能包装模型结构的冲击响应

利用空气炮冲击实验对吸能包装结构的跌落过程进行模拟，进行了缩比模型的正撞和30°斜撞实验，针对模型实验进行了数值分析，获得了吸能包装结构模型在撞击过程中的应力分布和塑性变形，并将计算情况与实验结果进行了分析。结果表明:在撞击中吸能包装结构主要通过缓冲木材的塑性变形及外钢壳屈曲产生的塑性铰吸收能量，塑性变形主要集中于撞击端，而远离撞击端未见塑性变形；计算中木材本构参数采用顺纹方向压缩应力应变曲线具有一定的有效性。

Impact response of scaled models of an energy-absorbing container

The drop process of an energy-absorbing container was simulated by air gun impact test, and the forward and 30° oblique impact experiments of the scale model were carried out. The numerical analysis for the model experiments was conducted to obtain the stress distribution and plastic deformation of the energy-absorbing container model in the impact process. And then the calculation and experimental results were compared. The results show that the energy-absorbing container absorbs energy mainly by the plastic deformation of cushion wood and the plastic hinges produced by the buckling of outer steel shell during impact, and its plastic deformation mainly concentrates at the impact end, while no plastic deformation is found far away from the impact end. In simulations, the compressive stress-strain curve of the wood in texture direction can be used to simulate the drop impact process of energy-absorbing container.