目的 研究快速获得缓冲材料任意高度、任意厚度的静应力-最大加速度曲线族的方法。 方法 先利用传统方法,得到一条静应力-最大加速度曲线。 然后选用同样材料,根据应力-能量法的原理与步骤求得 5 组动能量与动应力值,根据散点图推测函数为多项式,或者含指数项。 利用 Matlab 编程求得动能量与最大加速度的多项式、指数拟合函数模型,从而求出静应力与最大加速度的函数关系。结果 求取的多项式、指数拟合函数模型与传统方法获得的实验值相比均存在一定误差, 相比较而言,多项式拟合的数据与实际试验得到的数据误差较小。 结论 在精确度要求不严格的场合下,应力-能量法不失为一种简便、有效的方法。英文摘要

Objective To study a quick and easy method for getting σ_m-σ_stcurves of cushion materials of any height and thickness. Methods Using the traditional method to get a σ_m-σ_stcurve and the same cushion material to obtain five values of dynamic energy and dynamic stress according to the principle and steps of stress-energy method. Through Matlab programming, the function of static force and maximum acceleration was obtained by the polynomial and exponential fitting function models of dynamic energy and maximum acceleration. Results Compared with the traditional values, there were some errors in the polynomial and exponential fitting function models, and the error in the polynomial function model was smaller. Conclusion The results showed that the stress-energy method is more efficient in getting σ_m-σ_stcurves of cushion materials of any height and thickness, when the accuracy requirement is not very high.