水下冲击波和空气冲击波传播速度及物理参数的对比研究

A comparative study on the propagation speed and physical parameters of underwater blast wave and air blast wave

目的 对比研究水下冲击波和空气冲击波的传播速度和物理参数。方法 分别用 2 0 0、5 0 0和 1 0 0 0 gTNT进行水下和空气中爆炸 ,用美国PCB公司生产的压力传感器测定冲击波物理参数 ,分析冲击波的传播速度、超压峰值、正向持续时间和冲量。结果 水下冲击波传播速度快、峰值压力高、冲量较大 ,但持续时间短 ,同空气冲击波相比 ,传播速度为空气冲击波的 3 70～ 4 3 0倍 ,超压峰值为2 2 7 1 5～2 4 7 86倍 ,冲量为 8 4 8～ 1 1 80倍。结论 水下冲击波较空气冲击波传播速度快 ,峰值压力高 ,冲量大 ,这对评价水下冲击伤伤情和防治有一定指导意义。

Objective To compare the propagation speed and physical parameters between underwater blast wave and air blast wave. Methods The physical parameters of blast wave were measured by PCB pressure transducers (USA) during underwater and air explosions of 200g, 500g and 1000g TNT respectively. Consequently, the propagation speed, peak overpressure value, positive duration and impulse of blast wave were analyzed. Results Underwater blast wave was characterized by high propagation speed, high peak overpressure value, great impulse, however, short duration. Compared with air blast wave, the propagation speed of underwater blast wave was 3.70-4.30 times higher than that of air blast wave, the peak overpressure value was 227.15-247.86 times higher, and the impulse was 8.48-11.80 times greater than that of air blast wave. Conclusion Underwater blast wave propagates faster than that air blast wave. Meanwhile, it also peoduces higher peak overpressure value and impulse. This result is helpful for the evaluation of injury severity and treatment of underwater blast injury.