射流侵彻水夹层间隔靶的理论和实验研究

为得到聚能射流侵彻水夹层间隔靶规律,选取50 mm口径聚能装药对水夹层间隔靶(2 mm×4 mm钢靶板+100 mm水夹层)的侵彻过程进行了理论和实验研究。结合准定常侵彻理论和数学归纳法建立了射流侵彻水夹层间隔靶理论模型,得到了射流头部速度与侵彻距离之间的关系。为验证理论模型,用脉冲X光和计时仪获得了多个侵彻阶段的射流头部速度。通过模型分析了水夹层间隔靶结构对射流剩余头部速度的影响。结果表明:建立的理论模型正确,由其得到的射流穿过水夹层间隔靶后的剩余头部速度理论值与实验值平均误差为4.6%;当靶板厚度小于20 mm,且水夹层间隔小于150 mm时,水夹层间隔靶对射流头部速度的衰减效率较高。

Numerical Simulation and Experimental Study on the Cratering Stage of Shaped Charge Jet Penetrating into Target

To obtain the rules of jet penetrating spaced target with water interlayer,theoretical and experimental research were performed selecting the penetrating process of 50 mm caliber shaped charge penetrating spaced target with water interlayer (2 mm×4 mm steel plates +100 mm water interlayer). The theoretical model of jet penetrating spaced target with water interlayer was established by quasi-steady penetration theory and mathematical induction,the relationship of jet tip velocity and penetration distance was got. To validate the theoretical model,jet tip velocities of multiple stages were obtained by X-ray pulsed and timing device. The influence of spaced target with water interlayer to the remaining jet tip velocity was analyzed through theoretical model. The results show that the theoretical model is correct,after penetrating spaced target with water interlayer,the average error of remaining jet tip velocity between theoretical and experimental values is 4.6%.The attenuation efficiency of jet tip velocity by spaced target with water interlayer is higher when the target thickness is less than 20 mm and water separation distance is less than 150 mm.