基于空泡生长和溃灭理论分析不同环境压强对空泡膨胀的最大泡半径、收缩的最小泡半径、膨胀与收缩速度的影响.同时，利用高功率激光与液体物质相互作用产生空泡，采用高速照相机、高频测量水听器实验研究不同环境压强下液体中空泡运动规律，并将实验结果与计算结果进行对比.结果表明:环境压强对空泡脉动特性有较大影响.相同激光能量击穿液体介质时，随着外界环境压强的增加，空泡脉动周期呈现递减趋势；空泡第一次脉动的最大泡半径同脉动周期的变化趋势一致，且数值由快到慢递减；随着外界压强的增加，空泡溃灭的速度越快.随着压强的增大，空泡膨胀与收缩更为剧烈，持续时间更短.

The expansion and contraction of cavitation bubble in liquids with different ambient pressure were investigated experimentally, which are compared with the analyses based on Rayleigh-Plesset equation. In the experimental study, cavitation bubble was induced by the high-power laser and matter interaction in liquid, laser-induced cavitation bubble callapse in liquids with different ambient pressure were detected by high-speed video and high-frequency hydrophone. The results show that the ambient pressure has obvious influence on the bubble oscillation. Increasing the ambient pressure speeds up bubble collapse process, decreases the oscillating cycle and maximum bubble radii ,and shortens the time of expansion and contraction of cavitation bubble.