冲击波和破片对飞机油舱的耦合毁伤效应研究

Coupling Damage Effects of Shock Waves and Fragments on Aircraft Fuel Tank

针对杀爆战斗部导弹打击地面飞机目标时,不同强度爆炸冲击波和不同形状破片的耦合毁伤问题,建立不同形状破片和不同质量球体炸药打击飞机燃油舱的有限元模型,研究了单一毁伤元和多毁伤元耦合毁伤效应。结果表明:球体破片对飞机燃油舱的毁伤效果最好,长方体破片次之,正方体破片最差,但是长方体破片侵彻飞机燃油舱过程中温度最高、持续时间最长,对航空煤油的引燃概率最大;航空煤油内能和内部压力的升高主要是由破片的侵彻作用引起,冲击波对其具有增强作用,耦合作用下航空煤油的压力和内能增量大于两者单独作用之和;冲击波和破片耦合作用下不能提高破片对航空煤油的引燃能力。

To explore the coupling effect of shock waves and fragments during the strike of blast-fragmentation warheads on ground aircraft targets,finite element models of strikes by fragments with various shapes and explosive mass on an aircraft fuel tank were established.Thereby,coupling damage effects of single-damage source and multi-damage sources were analyzed respectively.Results showed that the damage effect of spherical fragments,cuboid fragments and cubic fragments decreases successively.However,the penetration into the aircraft fuel tank by the cuboid fragment has the highest temperature,the longest duration,and the largest probability of kerosene ignition.Fragment penetration leads to an increase in the internal energy and pressure of aviation kerosene,which is enhanced by shock waves.The increment of kerosene pressure and internal energy caused by the coupling effect of shock waves and fragments exceeds the sum of the individual effects.The coupling effects can not improve the ignition ability of fragments on aviation kerosene.