在数值模拟弹丸侵彻混凝土时,由于混凝土动力学本构模型较多且复杂,使得材料模型及其相关参数的选取成为数值模拟侵彻的难点。鉴于这种情况,在分析对比了Ls-Dyna混凝土材料模型的基础上,给出了各种模型的适用领域,又重点对混凝土Johnson-Homquist模型进行了研究分析,利用灵敏度分析与试验反演修正确定模型参数,在降低试验成本的同时提高了侵彻结果的准确度,利用此方法确定模型参数,模拟了Forrestal的部分侵彻试验。结果表明,此方法简单有效,能够很好的预测侵彻结果。

When simulating projectile penetrating into concrete targets, there are many concrete constitutive models and many parameters, but it's difficult for simulating penetration. In view of this, the application field of the model was given based on evaluation of typical concrete material models in Ls-Dyna, and then Johnson-Homquist concrete model was analyzed. The sensitivity analysis and test inversion were used for confirming model parameters with lower costs while improving the accuracy of penetration results. Part of the Forrestal invasion experiments was simulated by this method; the results show it is a simple and effective approach to better forecast the penetration results.