钢箱内部爆炸破坏的SPH数值模拟
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摘要
随着恐怖袭击的不断演化,船舶、桥梁等以钢箱为主要支撑的战略性结构逐渐成为恐怖袭击和敌方军事打击的重要目标。本文中采用光滑粒子流体动力学(smoothed particle hydrodynamics, SPH)方法对钢箱内部爆炸过程进行了数值模拟,对比实验,分析了钢箱内部爆炸时钢箱表面的变形过程,得到了钢箱表面挠度值的变化趋势、不同时刻钢箱表面压强和von Mises应力的分布情况、钢箱表面中心点处速度和压强的变化趋势,验证了SPH方法在模拟钢箱内部爆炸问题上的有效性。通过进一步数值模拟,探讨了钢箱内部不同位置爆炸时钢箱的破坏形式和损伤程度,结果表明:炸药在钢箱内部角隅处爆炸时,钢箱的损伤程度最严重;炸药在钢箱内部正中心爆炸时,钢箱的损伤程度最轻。
With the strategic structure of the evolving terrorist attacks, ships and bridges which are supported by steel boxes gradually become important targets of terrorist attacks and enemy military strikes.We simulate the explosion process in a steel box by applying the smoothed particle hydrodynamics(SPH)method, analyze the deformation process of the steel box during the internal explosion, obtain the distributions of the pressure and the von Mises stress at different times, and achieve the trend of velocity and pressure at the center of the steel box plate. We find the feasibility and accuracy of the SPH method in simulating the internal steel box explosion through comparing with the experiment. We simulate the damage form and damage degree of the steel box structure subjected to internal blast at different positions. The results show that: when the explosive explodes at the corner and 60 mm from each box's plate, there is the most serious damage; when the explosive explodes in the center, there is the least damage.
With the strategic structure of the evolving terrorist attacks, ships and bridges which are supported by steel boxes gradually become important targets of terrorist attacks and enemy military strikes.We simulate the explosion process in a steel box by applying the smoothed particle hydrodynamics(SPH)method, analyze the deformation process of the steel box during the internal explosion, obtain the distributions of the pressure and the von Mises stress at different times, and achieve the trend of velocity and pressure at the center of the steel box plate. We find the feasibility and accuracy of the SPH method in simulating the internal steel box explosion through comparing with the experiment. We simulate the damage form and damage degree of the steel box structure subjected to internal blast at different positions. The results show that: when the explosive explodes at the corner and 60 mm from each box's plate, there is the most serious damage; when the explosive explodes in the center, there is the least damage.
引文
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[8]强洪夫,范树佳,陈福振,等.基于拟流体模型的SPH新方法及其在弹丸超高速碰撞薄板中的应用[J].爆炸与冲击,2017,37(6):990-1000.DOI:10.11883/1001-1455(2017)06-0990-11.QIANG Hongfu,FAN Shujia,CHEN Fuzhen,et al.A new smoothed particle hydrodynamics method based on the pseudofluid model and its application in hypervelocity impact of a projectile on a thin plate[J].Explosion and Shock Waves,2017,37(6):990-1000.DOI:10.11883/1001-1455(2017)06-0990-11.
[9]QIANG Hongfu,WANG Kunpeng,GAO Weiran.Numerical simulation of shaped charge jet using multiphase SPHmethod[J].Transactions of Tianjin University,2008,14(1):495-499.
[10]LIU M B,LIU G R,LAM K Y.Meshfree particle simulation of the detonation process for high explosives in shaped charge unlined cavity configurations[J].Shock Waves,2003,12(6):509-520.
[11]JOHNSON G R,COOK W H.A constitutive model and data for metals subjected to large strains,high strain rates and high temperatures[C]//Proceedings of the Seventh International Symposium on Ballistics.The Hague,1983.
[12]强洪夫.光滑粒子流体动力学方法及应用[M].北京:科学出版社,2017:246-287.
[13]B?RVIK T,LANGSETH M,HOPPERSTAD O S,et al.Ballistic penetration of steel plates[J].International Journal of Impact Engineering,1999,22(9-10):855-886.
[14]NILSON A H.Bond stress-slip relationships in reinforced concrete:345[R].New York:Department of Structure Engineering,Cornell University,1971.
[15]BONORCHIS D,NURICK G N.The analysis and simulation of welded stiffener plates subjected to localized blast loading[J].International Journal of Impact Engineering,2010,37(3):260-273.
[16]朱新明.钢箱梁爆炸冲击局部破坏数值模拟研究[D].长沙:国防科技大学,2011:23-27.
[2]姚术健,张舵,郑监,等.内部爆炸作用下钢箱结构变形规律性实验[J].爆炸与冲击,2017,37(5):964-968.DOI:10.11883/1001-1455(2017)05-0964-05.YAO Shujian,ZHANG Duo,ZHENG Jian,et al.Experimental study of deformation of steel box subjected to internal blast loading[J].Explosion and Shock Waves,2017,37(5):964-968.DOI:10.11883/1001-1455(2017)05-0964-05.
[3]耿少波,刘亚玲,薛建英.钢箱梁缩尺模型爆炸冲击波作用下破坏实验研究[J].工程力学,2017,34(S):84-88.DOI:1000-4750(2017)Suppl-0084-05.GENG Shaobo,LIU Yaling,XUE Jianying.Experimental studies on steel box girder scale model under the blast load[J].Engineering Mechaincs,2017,34(S):84-88.DOI:1000-4750(2017)Suppl-0084-05.
[4]蒋志刚,朱新明,严波,等.钢箱梁爆炸冲击局部破坏的数值模拟[J].振动与冲击,2013,32(13):189-164.DOI:10.13465/j.cnki.jvs.2013.13.008.JIANG Zhigang,ZHU Xinming,YAN Bo,et al.Numerical simulation for local failure of a steel box girder under blast loading[J].Journal of Vibration and Shock,2013,32(13):189-164.DOI:10.13465/j.cnki.jvs.2013.13.008.
[5]TANG E K C,HAO H.Numerical simulation of a cable-stayed bridge response to blast loads:part I:model development and response calculations[J].Engineering Structures,2010,32(10):3180-3192.
[6]姚术健,蒋志刚,卢芳云,等.汽车炸弹钢箱梁内部爆炸局部破坏效应分析[J].振动与冲击,2015,34(7):222-227.DOI:10.13465/j.cnki.jvs.2015.07.035.YAO Shujian,JIANG Zhigang,LU Fangyun.Analysis on local damage of steel box girder under internal blast loading of vehicle bomb[J].Journal of Vibration and Shock,2015,34(7):222-227.DOI:10.13465/j.cnki.jvs.2015.07.035.
[7]MONAGHAN J J.Smoothed particle hydrodynamics[J].Annual Review of Astronomical and Astrophysics,1992(30):543-574.
[8]强洪夫,范树佳,陈福振,等.基于拟流体模型的SPH新方法及其在弹丸超高速碰撞薄板中的应用[J].爆炸与冲击,2017,37(6):990-1000.DOI:10.11883/1001-1455(2017)06-0990-11.QIANG Hongfu,FAN Shujia,CHEN Fuzhen,et al.A new smoothed particle hydrodynamics method based on the pseudofluid model and its application in hypervelocity impact of a projectile on a thin plate[J].Explosion and Shock Waves,2017,37(6):990-1000.DOI:10.11883/1001-1455(2017)06-0990-11.
[9]QIANG Hongfu,WANG Kunpeng,GAO Weiran.Numerical simulation of shaped charge jet using multiphase SPHmethod[J].Transactions of Tianjin University,2008,14(1):495-499.
[10]LIU M B,LIU G R,LAM K Y.Meshfree particle simulation of the detonation process for high explosives in shaped charge unlined cavity configurations[J].Shock Waves,2003,12(6):509-520.
[11]JOHNSON G R,COOK W H.A constitutive model and data for metals subjected to large strains,high strain rates and high temperatures[C]//Proceedings of the Seventh International Symposium on Ballistics.The Hague,1983.
[12]强洪夫.光滑粒子流体动力学方法及应用[M].北京:科学出版社,2017:246-287.
[13]B?RVIK T,LANGSETH M,HOPPERSTAD O S,et al.Ballistic penetration of steel plates[J].International Journal of Impact Engineering,1999,22(9-10):855-886.
[14]NILSON A H.Bond stress-slip relationships in reinforced concrete:345[R].New York:Department of Structure Engineering,Cornell University,1971.
[15]BONORCHIS D,NURICK G N.The analysis and simulation of welded stiffener plates subjected to localized blast loading[J].International Journal of Impact Engineering,2010,37(3):260-273.
[16]朱新明.钢箱梁爆炸冲击局部破坏数值模拟研究[D].长沙:国防科技大学,2011:23-27.
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