摘要
采用有限元方法模拟射孔枪射流的形成过程,并进一步模拟了射孔弹弹壳撞击射孔枪管壁的过程,对比不同情况下,在弹壳外壁上增加不同的附加金属层,对射孔枪管壁鼓包高度的影响。研究发现,增加一层软金属可以有效地减少鼓包的高度,并且软金属的屈服极限对其高度有较大的影响,屈服越大的材料,在相同的应变率下,吸收的能量相对较多,鼓包高度会相应越低,加7075铝合金的射孔弹壳撞击枪壁,较未加软金属的情况,可以减少52.1%的鼓包高度。在应变率相近的情况下,材料的屈服极限与鼓包的高度,存在近似的线性关系。
Finite element method was used to simulate the forming process of the shaped charge jet for perforating gun.The collision between the cartridge and the wall of the perforating gun was further simulated.Different cases were compared to study the effect of the attached metal on bulge height in perforating gun.Results indicate that the bulge height can be deceased obviously by the attachment of soft metal on perforator.The yield stress of the soft metal can significantly affect the bulge height.With the increase of the yield stress,the dissipated energy is increased in the case of same strain rate.So,the bulge height can be deceased.The selection of 7075 aluminum alloy can reduce the bulge height by 52.1% with comparison to the case without attached metal.Approximate linear relation between the bulge height and yield stress of attached metal can be found in the cases with similar strain rates.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2010年第6期121-126,共6页
Journal of Plasticity Engineering
基金
国家863资助项目(2006AA09Z326)
国家自然科学基金资助项目(10802017)
关键词
射孔枪
有限元法
射流
perforating gun
finite element method
shaped charge jet
