【摘要】 考虑结构弹塑性以及平底结构入水的空气垫效应,利用LS-DYNA软件对夹层板结构在不同入水速度下的砰击压力及其塑性动力响应进行计算,并将其与等质量的实体平板进行对比,得到高速入水砰击下夹层板的上面板的最大变形要小于实体平板的结果,同时研究了芯层相对密度对夹层板入水砰击响应的影响。计算结果表明,芯层相对密度对夹层板的砰击压力峰值和面板的变形响应影响较大。更多还原

【Abstract】 In cases of different impact velocities,the water-entry impact pressures and the responses of sandwich structure were calculated by LS-DYNA with considering the influence of hydro-elasticity and air cushion which always exist in the flat-bottom structure entry-water experiment.And the results were compared with those of the monolithic solid plate of equivalent area density.The influence of the core relative density on the response of the sandwich water-entry impact was researched.The results showed that the core relative density has important influence on the impact pressure and the response of the maximum deflection of the face sheet.更多还原