平面金属飞层对碰区速度剖面的精密测试

采用线阵多普勒光纤探针测速技术（Doppler pins system，DPS），对钨合金平面飞层对碰区速度剖面进行了精密测试研究，获得了4 mm长度范围内16个测点的速度-时间曲线。对速度曲线进一步处理后，给出了对碰区凸起轮廓发展演化过程、对碰区压力分布、材料表面是否发生破坏等丰富的实验参量和信息。实验结果表明，在本文实验装置构形下，冲击波对碰后发生规则反射，对碰后压力约为对碰前压力的2.5倍；冲击波对碰后的压力分布决定对碰区的凸起结构，钨合金飞层对碰区凸起为尖形结构。

Precision test of velocity profile in collision region of plane metal flying layer

Using the line array Doppler pins system(DPS) test technique, the velocity history of the collision region of a tungsten alloy plate was measured, and 16 test points were arranged within the 4-mm-long range in the collision region. The velocity curves were processed to obtain the experimental information such as velocity change, pressure distribution, bulge evolution and plate surface damage. Experimental results show that regular reflection occured after two shock waves colliding, and the pressure of the collision region after colliding was 2.5 times of one before colliding. Meanwhile, the pressure distribution in the collision region after colliding dominated the bulge contour of the collision region. And the collision region of the tungsten alloy flying layer took on a tip-shaped structure.