射流侵彻混凝土靶的靶体阻力计算模型与数值模拟研究

Theoretical Model for the Calculation of Concrete Target Resistance and Numerical Simulation of Penetration by Shaped Charge Jets

针对混凝土材料特性,应用球形空腔膨胀理论,得到了靶体阻力计算模型。通过与实验对比,验证了靶体阻力模型的可靠性。应用AUTODYN-2D程序对不同药型罩锥角条件下的射流形成以及射流侵彻混凝土靶过程进行了数值模拟。通过与闪光X射线高速摄影测量结果的对比,验证了聚能射流形成数值仿真结果的可靠性。通过数值仿真得到射流速度分布,从而得到虚拟原点位置。将数值仿真得到的侵彻空腔孔型与理论分析结果进行对比,二者吻合得很好。结果表明,应用本文空腔膨胀模型计算混凝土靶体阻力是可行的、可靠的。

A model to predict the resistance of concrete target based on the material properties was developed by using the spherical cavity expansion theory. The predicted values were compared with some experimental results to verify the reliability of the target resistance model. The formation of jet at different liner cone angles and the penetration of shaped charge jet into concrete target were numerically simulated with AUTODYN-2D code. The reliability of numerical simulation results of the formation of shaped charge jets was verified by comparing them with flash X-ray high-speed photograph results. The jet velocity distributions were obtained by numerical simulation results, and virtual points were then calculated. Simulation results are in agreement with the theoretical predictions. Results show that the cavity expansionmodel to predict the resistance of concrete target is feasible and reliable.