雷-靶碰撞结构响应仿真分析
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摘要
针对雷-靶碰撞过程中靶体结构及碰撞环境的特殊性与复杂性,基于船舶碰撞内部机理,采用流固耦合及附加质量法对鱼雷撞击目标靶时的结构响应进行了有限元仿真,研究了碰撞过程中靶体的结构损伤以及鱼雷速度及加速度变化。仿真结果表明:1)撞击过程具有很强的非线性特征,撞击角度的变化对雷体运动及靶体变形有一定程度的影响; 2)鱼雷撞击速度越大,雷头加速度响应峰值越高,靶体损伤程度越大。文中所做研究可为目标靶的结构设计及动态特性设计提供参考。
In view of the particularity and complexity of target structure and collision environment in the collision process of a torpedo and a target, the internal mechanism of ship collision is utilized and the fluid-solid coupling and additional mass method are employed to carry out finite element simulation of the structural response of a torpedo when it hits a target. The structural damage of a target and the variation of torpedo velocity and acceleration during collision are studied. Simulation results show that: 1) The hitting process has strong nonlinear characteristics, and the hitting angle has a certain influence on the motion of a torpedo and the deformation of a target; 2) The higher the torpedo hitting velocity is, the higher the peak acceleration response of torpedo head and the damage degree of target become. This research may provide a reference for the structure design and dynamic characteristic design of targets.
In view of the particularity and complexity of target structure and collision environment in the collision process of a torpedo and a target, the internal mechanism of ship collision is utilized and the fluid-solid coupling and additional mass method are employed to carry out finite element simulation of the structural response of a torpedo when it hits a target. The structural damage of a target and the variation of torpedo velocity and acceleration during collision are studied. Simulation results show that: 1) The hitting process has strong nonlinear characteristics, and the hitting angle has a certain influence on the motion of a torpedo and the deformation of a target; 2) The higher the torpedo hitting velocity is, the higher the peak acceleration response of torpedo head and the damage degree of target become. This research may provide a reference for the structure design and dynamic characteristic design of targets.
引文
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[11]Chang P Y,Seibold F,Thasanatorn C.A Rational Methodology for the Prediction of Structural Response due to Collisions of Ships[J].SNAME Transactions,1980,6(88):173-193.
[2]Minorsky.Analysis of Ship Collision Protection of Nuclear Powered Plant[J].Journal of Ship Research,1959,3(2):1-4.
[3]Chang P Y,Seibold F,Thasanatorn C.A Rational Methodology for the Prediction of Structural Response due to Collisions of Ships[C]//Annual meeting of the Society of Naval Architects and Marine Engineers.New York,USA:Soc.Nav.Archit.Mar.Eng.,Trans.,1980:173-193.
[4]王自力,顾永宁.船舶碰撞动力学过程的数值仿真研究[J].爆炸与冲击,2001,21(1):29-34.Wang Zi-li,Gu Yong-ning.Numerical Simulation of Ship Collisions[J].Explosion and Shock Waves,2001,21(1):29-34.
[5]朱新阳,梅志远,吴梵.潜艇典型结构在撞击载荷作用下动态响应的试验研究[J].船海工程,2009,38(4):88-91.Zhu Xin-yang,Mei Zhi-yuan,Wu Fan.Research on Dynamic Response Test of Submarine Typical Structure Unit’s under Impact Load[J].Ship&Ocean Engineering,2009,38(4):88-91.
[6]杨桂通,熊祝华.塑性动力学[M].北京:科学出版社,1982.
[7]王自力.船舶碰撞损伤机理与结构耐撞性研究[D].上海:上海交通大学,2000.
[8]汪玉,周璞,刘东岳.考虑流固耦合作用的舰船抗冲击仿真计算[J].振动与冲击,2005,24(1):74-80.Wang Yu,Zhou Pu,Liu Dong-yue.Numerical Simulation of Anti-shock Behavior of Ship Considering the Fluid-Structure Interaction in FEM[J].Journal of Vibration and Shock,2005,24(1):74-80.
[9]Petersen M J.Dynamics of Ship Collisions[J].Ocean Engineering,1982,9(4):295-329.
[10]梅志远.基于MSC Dytran的潜艇结构撞击强度分析[J].计算机辅助工程,2006,15(z1):71-74.Mei Zhi-yuan.Numerical Analysis Based on MSC Dytran Collision Strength of Submarine Structure[J].Computer Aided Engineering,2006,15(z1):71-74.
[11]Chang P Y,Seibold F,Thasanatorn C.A Rational Methodology for the Prediction of Structural Response due to Collisions of Ships[J].SNAME Transactions,1980,6(88):173-193.