疲劳效应对蜂窝纸板系统的内共振条件参数影响的研究

摘要

研究了疲劳压缩条件下，蜂窝纸板内共振条件的参数变化规律。首先，对预压缩后的蜂窝纸板进行不同次数疲劳压缩，接着进行准静态压缩，最后将得到的应力－应变曲线多项式拟合后得到蜂窝纸板本构模型参数值。利用变分迭代法得到单自由度和二自由度蜂窝纸板内共振条件，最后由本构模型参数计算得到内共振条件参数的变化规律。该结果对避免蜂窝纸板缓冲包装设计内共振的产生具有一定意义。%The variation of inner-resonance condition parameters of a honeycomb paperboard system was studied under fatigue compression.Firstly,the pre-compressed honeycomb paperboards were tested with different numbers of fatigue compression.Then,they were tested with quasi-static compression.The obtained stress-strain curves were fitted with polynomials to gain parameters of honeycomb paperboard's constitutive model.The inner-resonance conditions of a single-DOF honeycomb paperboard system and a 2-DOF one were acquired with the variational iteration method.Finally, the varying laws of the two systems'inner-resonance condition parameters were obtained through calculations of parameters of honeycomb paperboard's constitutive model.The results were significant to avoid inner-resonances during honeycomb paperboard cushion packaging design.