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仪器网/ 行业应用/ 解决方案/ 高速抛射体穿透沙层的实验研究

高速抛射体穿透沙层的实验研究

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The dynamics associated with a long rod projectile, travel领 at high velocity, penetrating a
heterogeneous target has long been an active research area. Historically both analytic and
numeric models have assumed a continuous target medium in order to predict the performance of
the penetrator-target system, even in cases where the target is composed of concrete, foam or a
granular porous medium such as sand. Continuum models fail to capture the complicated grain
level response within the heterogeneous target which can result in asymmetric loading of the
projectile leading to variations in projectile performance. In this work a series of experiments were
conducted in order to investigate the penetration dynamics of loose sand, specifically with a goal
of building a better understanding of the grain level dynamics. High speed photography coupled
with a particle image velocimetry (PIV) technique were used to capture both the grain level and
bulk response of the penetration event. Experiments were conducted over a velocity range of 30
to 100 m/s using both cylindrical and spherical projectiles. The results indicate that variations in
the projectile size and shape effect cavity formation and that cavity formation occurs nearly 25
times slower than the projectile velocity. 时间分辨粒子成像测速系统(TR-PIV) HighSpeedStar PIV相机 用于粒子成像测速(PIV)的荧光示踪粒子
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