对橡胶夹芯覆盖层在船模受水下爆炸时的防护作用进行了实验研究.以钢制加筋方盒模型为实验对象,针对有、无覆盖层2种情况开展了一系列5 kg当量的水下爆炸对比实验.对加速度、应变及壁压等物理量进行了分析对比.结果表明,超弹性覆盖层能有效降低结构受冲击波时的响应峰值.而壁压对比揭示了由于流固耦合,作用在结构上的总入射冲量大幅度降低.频域分析表明,覆盖层的作用可以用一个低通滤波器进行类比,对于50 Hz以上的高频信号衰减明显,但对于低于50 Hz的低频信号影响不大.%In order to explore the protective effects of the elastic rubber sandwich layer coated onto a ship hull, a series of 5-kg-TNT-equivalent underwater explosion tests were conducted on a floating steel box before and after the rubber sandwich was coated onto to comprehend the dynamic performance of the protective layer. Acceleration, strain and wall pressure histories at several typical locations were monitored as the main criteria and analyzed. The super-elastic protective layer is capable of lowering both acceleration and strain peaks of hull structures effectively. The wall pressure histories near the bottom hull illustrate that the transmitted impulse during the initial fluid-structure interaction stage can be reduced by almost 50%. Shock response spectrum analysis demonstrates that the elastic protective layer performs much like a low pass filter. It is capable of moderating high-frequency components of shock responses greatly, but not very effective in reducing low-frequency components.
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