水下爆炸载荷下充水多壳体结构动态响应计算方法  

Dynamic Response Calculation Method for Multi-Shell Structure Completely Filled with Liquid Under UNDEX

作　　者：刘国振[1] 汪俊[1] 刘建湖[1] 陈辉[1] 赵延杰 LIU Guo-zhen;WANG Jun;LIU Jian-hu;CHEN Hui;ZHAO Yan-jie(China Ship Scientific Research Center, Wuxi, Jiangsu 214082, China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《北京理工大学学报》2018年第4期364-370,共7页Transactions of Beijing Institute of Technology

基　　金：国家部委基础科研资助项目(B0820132045);国家部委预研资助项目(10106);国家安全重大基础研究项目(613279)

摘　　要：海军潜艇结构中,采用多壳体结构是一种新的结构设计形式.多壳体结构由轻外壳和多个耐压壳结构组成.当其遭受水下爆炸冲击时,由于舷间流体和多耐压壳结构的存在,使得冲击载荷的传播机理更加复杂,至今尚未建立合理可行的工程化方法进行描述.针对该复杂传播过程,在2阶双重渐进近似方法(DAA2)基础上,对内流场采用空化声学元(CAFE),推导出其流固耦合控制方程,然后采用经典充水3维球壳问题进行验证,精度良好.最后,开展多壳体结构舱段动响应试验验证,分别从速度、加速度和冲击环境进行计算和试验数据比对,研究结果表明精度良好,验证了计算方法的正确性.The fluid-filled multi-shell structure design is mostly used in submarines.The multishell structure consists of light shell and multi pressure shells.When it is exposed to attack by underwater weapons,the mechanism of transmission gets so complex that it has been a troublesome problem for a long time.In this paper,a numerical method was developed to solve the problem.The second-order doubly asymptotic approximations（DAA2）was used to analyze the external fluid-structure interaction（FSI）effect for the outer fluid field with the outer plates and cavitation acoustic finite element（CAFE）was used to model the internal FSI effect.Results obtained using this method showed good agreement with results of 3D fluid-filled spherical shell shock problem.Last,the method was validated by a fluid-filled multi-shell structure test.The velocity,acceleration and shock environment were compared with the test data.The research results show that the numerical method is accurate and have verified the effectiveness of the method.

关 键 词：水下爆炸 流固耦合 内流场 数值方法 

分 类 号：O383[理学—流体力学]