【摘要】 玻璃钢(GalssReinforcedPolymer,简称GRP)结构以其质轻、比强度高、无磁性和易于加工等优点备受各国军舰和海洋工程工程师的青睐。在扫雷舰外壳的选材上 ,GRP材料的无磁性特别受欢迎。改善GRP结构的抗爆强度并预报其在水下爆炸作用下的动响应变得十分重要。在这方面曾开展了很多试验研究 ,但理论研究报导得很少。其主要原因是玻璃钢结构与水下爆炸冲击波的相互作用的复杂性。本文给出了一种分析玻璃钢船结构在水下爆炸作用下动响应的分析方法。结构有限元方法用来模拟船体结构 ,一种修正的双重渐近方法用于分析流固相互作用。所谓修正的双重渐近方法是考虑了玻璃钢船体法向的声阻抗比较接近于水的声阻抗 ,所以玻璃钢材料的声学介质性质被用来分析湿表面上早期的高频流固相互作用。当冲击波过后 ,仍然采用一般的二阶双重渐近方法分析流固相互作用。计算结果和试验结果符合良好。为玻璃钢船的抗水下爆炸研究提供了有效的理论分析工具更多还原

【Abstract】 The glass reinforced polymer (GRP) has been chosen as the material for fabricating naval vessels owing to its some outstanding physical and mechanical properties.In case of mine countermeasures vessels (MCMVs),GRP is particularly good because of its non-magnetic property.So it is very important to improve the strength and to predict the motion of GRP ship structures to the loading of underwater explosion.Many experimental investigations are reported on public press, and little theoretical work has been reported on this research topic.The paper presents a method to analyze the responses of glass reinforced polymer (GRP) ship structures to underwater explosion.FEM method is used to simulate the ship structure,and the interaction between the monocoque ship hull and the underwater shock wave is analyzed by a modified doubly asymptotic approximation (DAA) method.Because the acoustic impedance value of GRP hull in normal direction is relatively close to water’s,the acoustic medium property of the GRP hull is applied to analyze the fluid-structure interaction in the early time after the shock wave impinging the wet surface. Thelater time interaction is analyzed by 2-order DAA method.The results of calculation have a good agreement with the results of test.更多还原