In the process of underwater explosion, the structures are impacted by the shock wave and at the same time the shock wave is also affected by the structures. In order to understand the effects of structures on the parameters of shock wave, the relationships among the pressure, positive pressure time, impulse per unit area and thickness of plate were deduced on the basis of Newton Second Law. In order to verify the calculated results, some experiments were designed. The calculated results are in good agreement with the experimental ones. The results show that the parameters of shock wave were mainly affected by the thickness of plate. The thicker the plate is, the slower the shock wave decays; the longer the positive pressure lasts, the larger the impulse per unit area is. Under the conditions of rigid boundary, the impulse per unit area is twice that of the free field.%水下爆炸过程中结构会受到冲击波载荷的作用同,同时结构也会对冲击波栽荷产生反作用.为了解结构对冲击波参数的影响规律,从牛顿第二定律出发,推导了冲击波压力、正压作用时间和比冲量与板厚之间的关系.为验证计算方法的正确性,设计了验证性试验,试验证实计算结果与试验结果吻合较好.计算表明:冲击波载荷参数主要受到板厚的影响,板厚越厚,冲击波衰减越慢;正压作用时间越长,比冲量就越大,在刚性壁情况下,比冲量为自由场的2倍.
展开▼
