目的 研究不同结构参数的正棱台缓冲垫（EPS）在接触面积相同且体积相同时静态缓冲性能的差异。方法 以发泡聚苯乙烯（EPS）为试验材料，设立10组接触面积相同，体积相同，厚度及斜面倾角不同的正棱台结构样本，利用万能材料试验机对10组样本进行静态压缩试验，得到10组不同结构参数的应力-应变曲线、应变能-应变曲线、应变能-应力曲线及缓冲系数-静应力曲线。结果 随着斜面倾角的增大，缓冲垫的刚度逐渐增大，能量吸收增大，当斜面倾角大于等于70°后，缓冲性能基本相同；在缓冲垫受到同等冲击强度条件下，斜面倾角为80°时正棱台缓冲垫的缓冲性能最好，应变能最大，且其产生的变形量及应力均小于普通六面体缓冲垫。结论 在包装设计过程中，可将接触面的侧面设置为80°倾角，按照此结构设计包装，产品更安全，接触部位厚度可降低25.12%，真正实现了降本增效。

The work aims to study the difference in static cushioning property of prism cushions (EPS) with different structural parameters when their contact area is the same and the volume is the same. With expanded polystyrene (EPS) as the test material, the static compression test was carried out on ten groups of samples with the same contact area, the same volume, different thickness and inclination by universal pressure tester. The stress-strain curves, strain energy-strain curves, strain energy-stress curves and cushioning coefficient-static stress curves of ten groups of different structural parameters were obtained. As the inclination of the bevel increased, the cushion stiffness increased gradually, and the energy absorption increased. When the inclination was greater than or equal to 70°, the cushioning property was basically the same. Under the condition that the cushion was subject to the same large impact strength, the prism cushion of 80° inclination had the best cushioning property and the largest strain energy, and the deformation and stress generated by the cushion were smaller than those of the ordinary hexahedral cushion. In the packaging design process, 80° inclination can be set on the side of the contact surface. Based on the packaging with such structural design, the product is safer and the thickness of the contact part can be reduced by 25.12%, realizing cost decreasing and benefit increasing.