水下爆炸冲击波作用下船体舱段刚体运动试验研究

Experimental STUDy of Rigid Body Motion of Hull Cabin Subjected to Underwater Shockwaves

对舰船舱段在水下爆炸球面冲击波作用下的刚体运动速度进行预报。以炸药在舱段中部正下方爆炸的工况为研究对象,将舱段简化为平板模型,计及流场对舱段运动时附加质量的影响,提出一种计算船体舱段在球面冲击波的作用下刚体运动响应的方法,对比舰船实尺度舱段水下爆炸试验结果,验证该方法的正确性。结果表明:舰船舱段整体受到冲击波的最大压力时刻比冲击波到达峰值压力的时间有一定的延迟,在冲击波压力趋于零时舱段刚体运动速度达到峰值。

The forecast method of rigid-body motion of ship subjected to spherical shockwave in the underwater explosion was studied .The study object was the condition that the explosive explodes in the central hull below and the hull was simplified as the plate.Taking into account the added mass of the flow field influence in the hull movement , a theory which was used to cal-culate the rigid body motion response of the hull in the role of the spherical shock wave was presented .The correctness of the the-oretical approach was verified through the underwater explosion test of the ship real scale cabin .The results showed that the time of the whole ship receiving the most tremendous shock-wave pressure is later than the shock wave itself reaching the peak pres-sure, and the speed of hull rigid motion achieves the peak value when the shock wave pressure tends to zero without considering the influence of gravity and buoyancy changes and other factors in the process of hull movement .