Similarity research of anomalous dynamic response of ship girder subjected to near field underwater explosion

Abstract：The final anomalous sag distortion of the ship girder subjected to the near field underwater explosion (undex) below the middle ship is studied.The sinking exercise of Spruance class destroyer DD973 sunk by one MK48 torpedo is first presented,and a simulation model is established.The exponential attenuation phase,the reciprocal attenuation phase,the post reciprocal attenuation phase,and the negative pressure phase of the undex load are precisely applied in this model.The fluid-solid interaction,the added water mass,the gravity,and the change of buoyancy are also taken into account.The similarity theory is then used to analyze the dynamic response of the ship girder.Similarity parameters and theory prediction formulae of the dynamic response of the ship girder are presented.The physical meaning and influences of these similarity parameters are analyzed. 作者： 張振華[1]  汪玉[2]  張立軍[1]  袁建紅[1]  趙海峰[1] Author： Zhen-hua ZHANG[1]  Yu WANG[2]  Li-jun ZHANG[1]  Jian-hong YUAN[1]  Hai-feng ZHAO[1] 作者單位： Department of Ship and Ocean Engineering, Naval University of Engineering, Wuhan 430033, P. R. ChinaNaval Academy of Armament, Beijing 100161, P. R. China 期 刊： 應用數學和力學（英文版）   EISCI Journal： Applied Mathematics and Mechanics 年，卷(期)： 2011, 32(12) 分類號： U663.2 Keywords： underwater explosion (undex)    ship girder    near field    anomalous response    similarity analysis    機標分類號： TL9 P4 機標關鍵詞： near field    ship    dynamic response    similarity theory    negative pressure    simulation model    physical meaning    interaction    water mass    influences    final    class    post 基金項目： the National Security Major Basic Research 973 Project of China Similarity research of anomalous dynamic response of ship girder subjected to near field underwater explosion[期刊論文]  應用數學和力學（英文版） --2011, 32(12)張振華  汪玉  張立軍  袁建紅  趙海峰The final anomalous sag distortion of the ship girder subjected to the near field underwater explosion (undex) below the middle ship is studied.The sinking exercise of Spruance class destroyer DD973 su...

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