楔形装药对射流干扰的数值模拟  

Numerical Simulation of Interference Effect of Wedge-Shaped Charge on Jet

作　　者：周杰 王凤英 原诗瑶 吴鹏 

机构地区：[1]中北大学环境与安全工程学院,山西太原030051

出　　处：《高压物理学报》2018年第2期133-140,共8页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11572292)

摘　　要：利用ANSYS/LS-DYNA模拟了楔形装药和平板装药对射流的干扰过程,分析了不同楔形角度和装药量对射流的头部速度以及偏转角、杵体速度等数据的影响,并与平板装药的模拟结果对比。结果表明:楔形装甲对射流头部的干扰作用与平板装药相同,但对射流杵体的干扰不同。楔形平板的运动是由板平动和转动组成的二维运动;当楔形角度为正时,楔形装药对射流切割效果较平板装药好,可使射流头部偏转增大,速度减缓,杵体速度减缓,且这种效果随着楔形角度的增加而增加;此外,楔形角度确定后,随着楔形装药量的提高,侵彻位置向楔形上端偏移,接触靶板时间滞后,杵体断裂时间提前,板旋转减弱。The process of wedge-shaped charge’s interference effect and that of sandwich charge’s on the jet were numerically simulated using ANSYS/LS-DYNA software.The influence of the wedge angle and that of the charge mass on the velocity and the declination angle of the jet head,the velocity of the slug were analyzed and discussed.Comparison of the obtained results with those of the sandwich charge shows that the interference effects of the wedge-shape charge and the sandwich charge on the jet head are very much alike but their interference effects on the jet slug are different.The movement of the wedge shaped flying-plates can be seen as a 2 Dcomposite motion of translation and rotation.When the wedge angle is positive,the cutting jet effect of the wedge-shaped charge is better than that of the sandwich charge.In this case,the deflection of the jet head increases,the velocity of the jet slug decreases,and the effect is enhanced with the increase of the wedge angle.Moreover,as the charge mass increases under the condition that the angle remains unchanged,the contact position of the jet head gradually shifts to the front of the target,the contact time delays,the breakup time of the jet slug arrives earlier,and the rotation of the plates slows down.

关 键 词：楔形装药 平板装药 爆炸装甲 ANSYS/LS-DYNA 

分 类 号：O389[理学—流体力学] TJ411[理学—力学]