目的 探究醋纤包装样棒对爆珠的缓冲力学性能，减少样棒在高速输送时因受到冲击载荷导致爆珠破损。方法 采用超弹性模型的方法对爆珠材料的本构模型进行定义，通过仿真与程序迭代完成材料超弹性模型2个关键参数的确定;运用Abaqus软件对醋纤包装样棒进行轴向和径向挤压仿真，最后通过搭建试验台对样棒与爆珠分别进行拉伸试验和挤压试验。结果 超弹性材料参数为C10=5.2 MPa、D1=0.38 kPa时，仿真计算出压板下压力F与爆珠理论所承受的最大压力值的相对误差为3.4%，符合醋纤包装样棒缓冲力学性能的仿真要求。随着样棒径向和轴向挤压量的逐渐增大，压板的支反力也逐渐增大，醋纤包装样棒在承受轴向冲击时对爆珠的缓冲效果更优秀。结论 爆珠材料本构模型的建立及仿真试验分析为研究醋纤包装样棒的高速输送提供了理论基础。

The work aims to explore the cushioning mechanical properties of acetate fiber packaging sample rod for burst bead, and reduce the damage of the burst bead caused by the impact load of the sample rod during high speed transportation. The constitutive model of the burst bead material was defined by the superelastic model method, and the two key parameters of the material hyperelastic model were determined through simulation and program iteration. In addition, Abaqus software was used to simulate the axial and radial extrusion of the acetate fiber packaging sample rod. Finally, a test platform was established to carry out tensile test and extrusion test on the sample rod and burst bead. When the superelastic material parameters were C10=5.2 MPa and D1=0.38 kPa, the relative error between the pressure F of pressure plate and the maximum pressure borne by the bead burst was 3.4% after calculated through simulation, which met the simulation requirements of the cushioning mechanical properties of the acetate fiber packaging sample rod. With the gradual increase of the radial and axial extrusion displacement of the acetate fiber sample rod, the support force of the pressure plate also gradually increased, and the cushioning effect of the acetate packaging sample rod on the burst beads under axial force was better. The establishment of constitutive model for burst bead material and the simulation test analysis provide a theoretical basis for the high speed transportation of acetate fiber packaging sample rod.