目的 研究不同密度衬垫材料的动态缓冲特性曲线获得方法，获得不同密度衬垫材料的材料性能变化规律，以提高测试效率。方法 针对不同密度的EPS进行动态压缩实验，通过对比不同密度下应力-能量方程的关键材料常数a和b，进行材料常数在密度不同时的变化曲线拟合，分析材料不同密度之间a和b的变化趋势。结果 经过多次不同函数类型的曲线拟合及对比分析，得到衬垫材料在不同密度下应力-能量方程的a和b，及其符合特定多项式的数学关系式。结论 得到了EPS材料的应力-能量方程式及材料常数a和b的变化趋势函数，由此获得同一衬垫材料在任意密度下的动态缓冲曲线。

The work aims to study the method to obtain the dynamic cushioning characteristic curve of liners of different densities to get the change law of material property, in order to enhance the test efficiency. The dynamic compression tests for EPS of different densities were conducted. Based on the comparison of constants a and b of stress-energy equation under different densities of key materials, the changing curves of material constants under different densities were fitted to analyze the change trend of values a and b under different densities of materials. Through multiple curve fittings of different function types and comparative analysis, the values a and b of stress-energy equation and the specific polynomial mathematical relationship were acquired for the different densities of liner materials. The stress-energy equation and the change trend functions of constants a and b of EPS materials are obtained, from which the dynamic cushioning curve under any density of the same liner can be obtained.