陆军伟;汪泉;李志敏;林朝键;刘文震;
LU Jun-wei;WANG Quan;LI Zhi-min;LIN Chao-jian;LIU Wen-zhen;School of Chemical Engineering, Anhui University of Science & Technology;Engineering Laboratory of Explosive Materials and Technology of Anhui Province;

• 1:安徽理工大学化学工程学院
• 2:安徽省爆破器材与技术工程实验室

摘要(Abstract)：

为了研究环境压力对爆炸冲击波传播的影响,采用非线性有限元AUTODYN建立了TNT自由场爆炸的一维球对称楔形模型,对不同初始环境压力下的爆炸冲击波超压值和波阵面的运动规律进行了分析。结果表明:数值模拟很好地再现了自由场爆炸冲击波的传播过程;常压下的数值模拟结果与常用经典超压公式有所差异,所模拟的冲击波超压值与Henrych公式最为接近;在不同的初始环境压力下,同一测点的TNT超压值会随着环境压力的降低而降低,而波阵面的运动速度则会随着环境压力的降低而升高。当外界环境为绝对真空时,冲击波爆炸产物为介质传播,爆炸产物的传播距离与时间呈线性关系。
To study the influence of environmental pressure on the propagation of explosion shock wave, a one-dimensional spherical symmetric wedge-shaped model of TNT free field explosion was established by using nonlinear finite element AUTODYN. The overpressure value of explosion shock wave and the motion law of wave front under different initial environmental pressures were analyzed. The results show that the propagation process of free field explosion shock wave is well reproduced by numerical simulation. The results of numerical simulation at atmospheric pressure are different from those of classical overpressure formula, and the simulated overpressure values of shock wave are closest to those of Henrych formula. Under different initial environmental pressure, the value of TNT overpressure at the same measuring point will decrease with the decrease of environmental pressure, while the velocity of wave front will increase with it. When the external environment is absolute vacuum, the shock wave is generated by explosion products, and the propagation distance of explosion products is linear with time.

关键词(KeyWords)： 冲击波;超压;数值模拟;环境压力;波阵面
shock wave;overpressure;numerical simulation;environmental pressure;shock wave front

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上资助项目(11872002);; 研究生创新基金资助项目(2019CX2058)

作者(Authors): 陆军伟;汪泉;李志敏;林朝键;刘文震;
LU Jun-wei;WANG Quan;LI Zhi-min;LIN Chao-jian;LIU Wen-zhen;School of Chemical Engineering, Anhui University of Science & Technology;Engineering Laboratory of Explosive Materials and Technology of Anhui Province;

DOI: 10.19931/j.EB.20200164

参考文献(References)：

• [1] 石培杰.爆炸容器冲击波载荷行波杆测量技术研究[D].长沙：国防科学技术大学，2007.SHI P J.Research on measuring technology of shock wave load of explosive container[D].Changsha:National University of Defense Technology,2007.
• [2] HUTOV I,GANEV R,PETKOV Y.Blast loading on structures from the explosions near the ground surface[J].Machines.Technologies.Materials.,2015,9(12):84-87.
• [3] BRODE H L.Blast wave from a spherical charge[J].The Physics of Fluids,1959,2(2):217-229.
• [4] HENRYCH J,MAJOR R.The dynamics of explosion and its use[M].Amsterdam:Elsevier,1979:302-308.
• [5] TOLBA A F F.Response of frp-retrofitted reinforced concrete panels to blast loading[D].Canada:Carleton University,2002:23-29.
• [6] 龙建华，苏红梅，胡八一.小当量密封爆炸容器的设计[J].机械工程师，2005(11):86-87.LONG J H,SU H M,HU B Y.Design of small equivalent sealed explosion vessel [J].Mechanical Engineer,2005 (11):86-87.
• [7] 吴赛，赵均海，张冬芳，等.自由空气中爆炸冲击波的数值分析[J].工程爆破，2019,25(3):1-6,31.WU S,ZHAO J H,ZHANG D F,et al.Numerical analysis of explosion wave in free air[J].Engineering Blasting,2019,25(3):1-6,31.
• [8] 李科斌，李晓杰，闫鸿浩，等.不同真空度下空中爆炸近场特性的数值模拟研究[J].振动与冲击，2018,37(17):270-276.LI K B,LI X J,YAN H H,et al.Numerical simulation of near field characteristics of air explosion under different vacuum degrees[J].Journal of Vibration and Shock,2018,37(17):270-276.
• [9] 谢雪腾.高原环境爆炸冲击波传播特性的数值模拟与实验研究[D].南京：南京理工大学，2017.XIE X T.Numerical simulation and experimental study on propagation characteristics of explosion shock wave in plateau environment [D].Nanjing:Nanjing University of Science and Technology,2017.
• [10] SILNIKOV M V ,CHERNYSHOV M V ,MIKHAYLIN A I .Blast wave parameters at diminished ambient pressure[J].Acta Astronautica,2015,109:235-240.
• [11] IZADIFARD R A ,FOROUTAN M .Blastwave parameters assessment at different altitude using numerical simulation[J].Turkish Journal of Engineering & Environmental Ences,2010,34(1):25-42.
• [12] VELDMAN R L,NANSTEEL M W,CHEN C C T,et al.The effect of ambient pressure on blast reflected impulse and overpressure[J].Experimental Techniques,2017,41(3):227-236.
• [13] 宋水舟.不同真空度条件下结构内爆炸冲击波特性的数值模拟研究[D].太原：太原理工大学，2018.SONG S Z.Numerical simulation study of the characteristics of explosive shock waves in structures under different vacuum conditions[D].Taiyuan:Taiyuan University of Technology,2018.
• [14] Century Dynamics.AUTODYN user manual,Version 6.1[M].California:2005.
• [15] SADOVSKYI M A.Mechanical action of air shock waves of explosion,based on experimental data[M].Moscow:Izd Akad Nauk SSSR,1952:389-395.
• [16] 叶晓华，王从银，董正才.军事爆破工程[M].北京：解放军出版社.1999:267-273.YE X H,WANG C Y,DONG Z C.Military blasting engineering [M].Beijing:PLA Press.1999:267-273.
• [17] 奥尔连科.爆炸物理学[M].北京：科学出版社.2011:415-417.ORLENKO.Explosion physics [M].Beijing:Science Press.2011:415-417.