为研究充液容器内液体介质类型对液压水锤效应的影响,利用ANSYS/LS-DYNA分析了水、柴油和航空煤油对水锤效应的影响,并进行试验验证。结果表明:破片以1000m/s的速度撞击分别装满水、柴油和航空煤油容器的过程中,破片在水中消耗的能量最大,约占破片总动能的40.28%,柴油次之,航空煤油中消耗的能量最少。破片在水中速度衰减系数约为航空煤油中衰减系数的1.29倍,三种介质中的阻力系数相差不大,说明液体密度为影响破片在液体中运动规律的主要影响因素。装有水介质的容器后壁面的最大变形量最大,为装有航空煤油容器后壁面变形量的1.22倍,说明破片撞击装有水介质的容器时形成的水锤效应对容器的破坏更严重。
Abstract
To study the influence of the liquid medium type on the hydrodynamic ram effect, the influence of water, diesel and aviation kerosene on the hydraulic ram effect was analyzed by ANSYS / LS-DYNA and verified through experiments.The results show that the fragment in the water consumption of energy accounted for about 40.28% of the total fragmentation of the total kinetic energy, followed by diesel, and aviation kerosene consumed minimal energy in the process of liquid-filled container impacted by the fragment with the speed of 1 000 m/s.The attenuation coefficient of the fragment velocity is about 1.29 times of that in the aviation kerosene.The difference of the drag coefficients in the three media is not obvious, which indicates that the liquid density is the main influencing factor of the law of the fragmentation in the liquid.The maximum deformation of the rear wall of the water-filled container is 1.22 times of that in the aviation kerosene container, indicating that hydrodynamic ram effect does more serious damage to the container filled with water.
关键词
液体介质 /
水锤效应 /
充液容器 /
破坏
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Key words
Liquid medium /
hydrodynamic ram /
Liquid filling container /
damage
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