基于分离式霍普金森压杆(SHPB)围压加载下的试样受力模型,考虑试样与套筒间的摩擦效应,建立了动态力学性能参量(动态泊松比及动态杨氏模量)的修正方法,并以某浇注PBX炸药为例,分别以常规方法和修正方法计算了4种试样的动态力学性能,并进行了对比.结果表明,对于实验所用的浇注PBX炸药,在应变率300~2000s-1内,修正方法与常规方法所获得的动态参量误差不超过5%,可以忽略摩擦效应对此PBX炸药动态参量的影响.%Based on the subjected force model of specimen under confined pressure loading of split Hopkinson pressure bar(SHPB), considering the friction effect between sample and sleeve, a correction method of dynamic mechanics performance parameters (dynamic Poisson′s ratio and dynamic Young′s modulus) is established.Taking a cast PBX explosive as an example, the dynamic mechanics parameters of 4 kinds of samples were calculated by conventional method and correction method, respectively and compared.The results show that for cast PBX explosives used in experiments, under the strain rate of 300-2000s-1 ,the error of dynamic mechanical parameter values obtained by conventional method and correction method is less than 5%.The effect of friction effect on dynamic parameters of the PBX can be neglected.
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