不同当量TNT爆炸驱动能力模拟数值仿真研究

战斗部爆炸时会产生诸多毁伤元,爆炸破片是其主要的毁伤参量之一,其中破片的飞行速度是评价破片毁伤威力大小的重要指标,研究战斗部爆炸驱动破片能力对于评价战斗部毁伤威力具有重要意义.利用AUTODYN建立不同TNT当量爆炸驱动破片能力的数值仿真模型进行实验研究.建立相应爆炸驱动装置模型,设置TNT当量分别为34 g,50 g,98 g,对同一破片进行爆炸驱动分析.仿真结果表明,随着TNT当量的增加,爆炸驱动破片能力逐渐增强,并且破片最大飞行速度与TNT装药当量成正相关.对破片最大飞行速度进行数值提取,采用多元函数关系式拟合方法得到破片飞行速度与TNT当量之间的工程数值模型,利用该模型可以较准确地由TNT当量推算出破片最大飞行速度,为实际靶场爆炸驱动试验提供一定的理论支持.

Numerical Simulation Research on Different Equivalent TNT Explosion-Driven Capability

When the warhead explodes,there will be many damage elements.The explosive fragment is one of its main damage parameters.The flight speed of the fragment is an important indicator for evaluating the damage power of the projectile.It is of great significance to study the explosion driven fragmentation capabilities of warhead to evaluate the damage power of warhead.This paper uses AUTODYN to establish numerical simulation models of different TNT equivalent explosion-driven fragmentation capabilities for experimental research.The corresponding explosion-driven device model was established in the paper,and the TNT equivalents were set as 34 g,50 g,and 98 g,respectively.The same fragment was subjected to explosion-driven analysis.The simulation results show that with the increase of TNT equivalent,the explosion-driven fragmentation ability is gradually enhanced,and the maximum fragmentation flight speed is positively correlated with the TNT charge equivalent.The maximum flight speed of fragmentation was numerically extracted,and the engineering numerical model between the flight speed of fragmentation and the TNT equivalent was obtained by using the method of multivariate functional relation fitting.Using this model,the maximum flight speed of fragment can be accurately estimated from TNT equivalent,which provides a certain theoretical support for the actual shooting range explosion drive test.