破片高速侵彻防护液舱剩余特性研究

为探讨破片高速侵彻液舱后的剩余特性,通过弹道试验,并结合有限元分析软件Ansys/Ls-Dyna,比较破片侵彻垂直和倾斜液舱后的瞬时余速和运动轨迹.试验结果表明:破片穿透液舱前板初期,会产生空泡和射流,空泡大小和射流强度与破片入水初速有关,而空泡形状和射流方向则受液舱的倾斜角度影响;破片穿透液舱前板后,在水中的运动轨迹会发生偏转,偏转方向与破片入水初速有关.

Research on residual characteristics of protecting liquid cabin penetrated by high-velocity fragments

To explore the residual characteristics of protecting liquid cabin penetrated by high velocity fragments,experiments were carried out,and combine Ansys/Ls-Dyna,comparisons between vertical and inclined liquid cabins penetrated by fragments in terms of instantaneous fragment velocities and moving trajectories result show that,in the earlier stage after the fragment perforating the protecting liquid cabin foreplate,cavities and jets are produced.The cavity size and the jet intensity are both related to entry-water initial velocities of fragments,whereas both the cavity shape and the jet direction are affected by the inclined angle of the protecting liquid cabin.After the perforation of protecting liquid cabin foreplate,the moving trajectories of fragments will deflect,and the deflection direction is related to entry-water initial velocities of fragments.