水中聚能战斗部毁伤双层圆柱壳的数值模拟与试验研究
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摘要
为研究聚能战斗部的水下作用特性,基于光滑粒子流体动力学-有限元方法耦合算法,模拟了聚能战斗部对双层圆柱壳结构的毁伤过程。分析金属射流的形成和射流速度衰减规律,研究高速金属射流、强冲击波与气泡载荷联合作用下对双层圆柱壳结构的毁伤模式和毁伤特性,并进行了海上模型试验验证。数值模拟与试验结果吻合良好。研究表明:水中聚能战斗部对双层圆柱壳结构的破坏载荷主要有金属射流、冲击波载荷及气泡载荷3种,金属射流穿透力强,造成结构的局部小尺寸破口;冲击波载荷及气泡载荷作用面积大,引起结构的大面积破口及塑性凹陷。
In order to investigate the underwater explosion characteristic,the damage process of shaped charge warhead to double-layer columniform shell is simulated based on SPH-FEM coupling algorithm.The formation and velocity decay rule of metal jet are analyzed.The damage modes and the characteristics of high-speed metal jet are used to study the effects of strong shock wave and bubble load on doublelayer columniform shell structure.The sea model explosion tests were conducted to verify the simulation.The numerically simulated results are in good agreement with the test results.It can be concluded that the damage effects of the shaped charge warhead on double-layer columniform shell include metal jet,shock wave and bubble.The metal jet causes small crevasse on the shell,and the shock wave and bubble cause large holes and plastic hollows on the shell.
In order to investigate the underwater explosion characteristic,the damage process of shaped charge warhead to double-layer columniform shell is simulated based on SPH-FEM coupling algorithm.The formation and velocity decay rule of metal jet are analyzed.The damage modes and the characteristics of high-speed metal jet are used to study the effects of strong shock wave and bubble load on doublelayer columniform shell structure.The sea model explosion tests were conducted to verify the simulation.The numerically simulated results are in good agreement with the test results.It can be concluded that the damage effects of the shaped charge warhead on double-layer columniform shell include metal jet,shock wave and bubble.The metal jet causes small crevasse on the shell,and the shock wave and bubble cause large holes and plastic hollows on the shell.
引文
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[3]徐斌,刘春美,黄广炎.基于正交试验法研究线型聚能装药结构对双层靶板的作用[J].科学技术与工程,2015,15(35):138-143.XU Bin,LIU Chun-mei,HUANG Guang-yan.Study on linear shaped charge jet penetrating into double layer targets based on orthogonal optimization method[J].Science Technology and Engineering,2015,15(35):138-143.(in Chinese)
[4]Zhang A M,Yang W S,Huang C,et al.Numerical simulation of column charge underwater explosion based on SPH and BEM combination[J].Computers&Fluids,2013,71(3):169-178.
[5]李金明,刘波,姚志敏.基于LS-DYNA程序的聚能装药数值仿真研究[J].计算机与数字工程,2016,44(2):218-222.LI Jin-ming,LIU Bo,YAO Zhi-min.Shaped charge numerical simulation based on LS-DYNA program[J].Computure&Digital Engineering,2016,44(2):218-222.(in Chinese)
[6]李兵,张之凡,明付仁,等.聚能战斗部对潜艇舱段结构毁伤特性研究[J].兵工学报,2014,35(2):362-365.LI Bing,ZHANG Zhi-fan,MING Fu-ren,et al.Research on damage characteristics of submarine cabin subjected to shaped charge warhead[J].Acta Armamentarii,2014,35(2):362-365.(in Chinese)
[7]李磊,马宏昊,沈兆武,等.聚能射流侵彻钢靶的SPH-FEM数值模拟[J].南京理工大学学报,2013,37(2):226-232.LI Lei,MA Hong-hao,SHEN Zhao-wu,et al.Numerical simulation of shaped charge jet perforating steel target by SPH-FEM coupling method[J].Journal of Nanjing University of Science and Technology,2013,37(2):226-232.(in Chinese)
[8]郭刘伟,曹仁义,庞勇,等.聚能射流水中侵彻行为的实验研究[J].实验力学,2015,30(1):111-115.GUO Liu-wei,CAO Ren-yi,PANG Yong,et al.Experimental investigation on water penetration behavior of shaped charge jet[J].Journal of Experimental Mechanics,2015,30(1):111-115.(in Chinese)
[9]杨刚,傅奕珂,郑建民,等.基于SPH方法对不同药型罩线性聚能射流形成及后效侵彻过程的模拟[J].振动与冲击,2016,35(4):56-61.YANG Gang,FU Yi-ke,ZHENG Jian-min,et al.Simulation of formation and subsequent penetration process of linear shaped charge jets with different liners based on SPH method[J].Journal of Vibration and Shock,2016,35(4):56-61.(in Chinese)
[10]Chen J K,Beraun J E.A generalized smoothed particle hydrodynamics method for nonlinear dynamic problems[J].Computer Method in Applied Mechanics Engineering,2000,190(1/2):225-239.
[11]李磊,沈兆武,李学岭.SPH方法在聚能装药射流三维数值模拟中的应用[J].爆炸与冲击,2012,32(3):316-321.LI Lei,SHEN Zhao-wu,LI Xue-ling.Application of SPH method to numerical simulation of shaped charge jet[J].Explosion and Shock Waves,2012,32(3):316-321.(in Chinese)
[12]Attaway S,Heinstein M,Swegle J.Coupling of smoothed particle hydrodynamics with the finite element method[J].Nuclear Engineering Design,1994,150(2/3):199-205.
[13]Johnson G R,Stryk R A,Beissel S R,et al.An algorithm to automatically convert distorted finite elements into meshless particle during dynamics deformation[J].International Journal of Impact Engineering,2002,27(10):997-1013.
[14]Dobratz B M.LLNL explosive handbook[M].Livermore,CA,US:Lawrence Livemore National Laborary,1985.
[15]Shin Y S,Lee M,Lam K Y,et al.Modeling mitigation effects of water shield on shock waves[J].Shock and Vibration,1998,5(4):225-234.
[16]Libersky L D,Randles P W,Carney T C,et al.High strain Lagrangian hydrodynamics:a three-dimensional SPH code for dynamic material response[J].Journal of Computational Physics,1993,109(6):67-75.
[17]Steinberg D J.Spherical explosions and the equation of state of water[M].Livermore,CA,US:Lawrence Livermore National Laboratory,1987.