In research of the characteristics of the cavity evolution, the pressure, and the liquid spurt in hydrodynamic ram, the experiment of the high-velocity fragment impacting the water-filled container had been conducted. The relationships between the above three characteristics have been researched. The evolution of the cavity can be divided into three processes according to its shape characteristics. The first liquid spurt occurred in Process Ⅱ and the rest of it occurred in Process Ⅲ. The duration of the second liquid spurt is longer than the first liquid spurt. When the impact velocity of the fragment is less than 996 m/s, the velocity of the second liquid spurt is the highest. When the velocity of the fragment is greater than 996 m/s, the velocity of the first liquid spurt is the highest. The maximum velocities of the first and second liquid spurt are 111 m/s and 94 m/s respectively. The pressure fluctuated sharply in Processes Ⅰ and Ⅲ. The maximum peak pressures in the shock and the cavity oscillation phases are 15.51 MPa and 7.96 MPa respectively. The time interval of the two adjacent pressure pulses increases with the increase of the fragment velocity.

在研究流体动力柱塞空腔演化、压力和液体喷射特性方面，进行了高速破片冲击充水容器的实验。对以上三个特征之间的关系进行了研究。型腔的演变按其形状特征可分为三个过程。第一次喷液发生在工艺Ⅱ，其余喷液发生在工艺Ⅲ。第二次液体喷射的持续时间比第一次液体喷射的时间长。当破片的冲击速度小于 996 m/s 时，第二次液体喷射的速度最高。当破片速度大于 996 m/s 时，第一次喷液的速度最高。第一次和第二次液体喷射的最大速度分别为 111 m/s 和 94 m/s。工艺Ⅰ和工艺Ⅲ压力波动较大。冲击和空腔振荡阶段的最大峰值压力分别为 15.51 MPa 和 7.96 MPa。两个相邻压力脉冲的时间间隔随着碎片速度的增加而增加。