为了获得厚壁圆管在横向高速冲击下的响应规律，进行了预制破片冲击圆管试验，得到不同冲击速度作用下圆管的响应模态及侵彻深度，并采用LS-DYNA对整个动态变化过程进行了仿真研究，获得了侵彻过程中预制破片的速度变化规律及圆管壁厚和预制破片长径比对极限穿透速度的影响规律。结果表明侵彻深度与冲击速度线性相关；圆管壁厚在7mm-8mm之间时对圆管极限穿透速度影响最大；预制破片长径比低于1.5时，对圆管极限穿透速度有显著影响，但其影响效果随自身的增大而逐渐削弱，当达到3.5左右时极限穿透速度不再变化。
Abstract
To get that the response of the thick-walled pipe under lateral high velocity impact, experimented prefabricate fragment impact circular tube, acpuired the tube's response modes and penetration depth under the impact at different velocities,and studied the dynamic process by simulation using Ls-Dyna,got the change law on the velocity of the prefabricate fragment and relationship between the ultimate velocity and wall thickness or length-diameter ratio.results indicate that there is significant linear correlation between and velocity penetration depth;wall thickness mostly affect ultimate velocity at 7mm-8mm; prefabricate fragment's length-diameter ratio have a significant impact to ultimate velocity under 1.5，but it's effect languishingly along with increase of itself, the ultimate velocity don't change when length-diameter ratio at 3.5.
关键词
厚壁圆管 /
预制破片 /
高速冲击 /
极限穿透速度 /
数值仿真
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Key words
thick-walled pipe /
prefabricate fragment /
high velocity impact /
ultimate velocity;numerical simulation
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