HJC模型参数对侵彻效应影响度的数值研究

Numerical Study on the Effect of HJC Model Parameters on Penetration

为了摸清HJC材料模型参数对侵彻毁伤效应影响的灵敏度,确定一组较为合理的基准参数,分类给定参数的调试范围,基于多学科优化平台HyperStudy联合LS-DYNA软件进行了DOE分析,得到参数中对侵彻效应的余速影响较大的参数:压实压力P l、归一化黏聚强度系数A、准静态单轴抗压强度f c、压实体应变μl、归一化压力硬化系数B。在动能弹侵彻混凝土数值模拟中,结合试验结果或精度较高的经验公式重点确定敏感参数的取值,模型具有一定的普适性,具有较好的工程应用价值。

In order to find out the sensitivity of the parameters of the HJC material model to the effect of penetrating damage,based on the results of previous studies,a set of reasonable reference parameters is determined,The debugging range of given parameters is classified,and then the DOE analysis is carried out based on the multidisciplinary optimization platform HyperStudy and LS-DYNA software,The parameters that have great effect on the residual velocity of penetration are:Compaction pressure P l,Normalized cohesive strength A,Quasi-static uniaxial compressive strength f c,compressive strainμl,Normalized pressure hardening B.In the numerical simulation of kinetic energy projectile penetrating concrete,the value of sensitive parameters is determined by the empirical formula with high precision.The model has certain universality and has good engineering aplication value.