爆炸分离钛合金板的研究
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摘要
为得到使钛合金板恰好分离的炸药量。应用量纲分析法确定了试验的主要影响因素,抽象出几何相似律;借助于显式有限元分析程序AUTODYN中的SPH(Smoothed Particle Hydrodynamics)法,用计算机数值模拟预估出使合金板恰好分离的装药量;通过调整不耦合装药与间隔装药结构,精确控制装药参数,最终通过试验确定了药量,得到了最小壁厚、装药直径和缓冲层厚度之间的最佳比例关系,与数值模拟结果对比,两者结果较相近,表明了研究思路的可行性。为复杂工程环境中确定爆炸分离构件的药量提供了参考方案。
In order to get charging amount for precisely separating a titanium alloy sheet, the dimensional analysis method was applied to determine main influence factors of a test, and abstract the geometric similarity law. Numerical simulation was used to predict the charging amount for precisely separating a titanium alloy sheet by means of the SPH method in the explicit finite element analysis program AUTODYN. Through adjusting structures of decoupled charge and spaced charge and accurately controlling charge parameters, finally the charging amount was determined with tests to obtain the optimal proportional relation among minimum wall thickness, charging diameter and cushion layer. The test results were compared with numerical simulation ones. It was shown that both results are very close to each other; the feasibility of the study ideas is verified; the proposed method provides a reference scheme for determining charging amount of explosive separation components in complicated engineering environment.
In order to get charging amount for precisely separating a titanium alloy sheet, the dimensional analysis method was applied to determine main influence factors of a test, and abstract the geometric similarity law. Numerical simulation was used to predict the charging amount for precisely separating a titanium alloy sheet by means of the SPH method in the explicit finite element analysis program AUTODYN. Through adjusting structures of decoupled charge and spaced charge and accurately controlling charge parameters, finally the charging amount was determined with tests to obtain the optimal proportional relation among minimum wall thickness, charging diameter and cushion layer. The test results were compared with numerical simulation ones. It was shown that both results are very close to each other; the feasibility of the study ideas is verified; the proposed method provides a reference scheme for determining charging amount of explosive separation components in complicated engineering environment.
引文
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[2] 丁继锋,赵欣,韩增尧.航天器火工冲击技术研究进展[J].宇航学报,2014,35 (12):1339-1348.DING Jifeng,ZHAO Xin,HAN Zengyao.Research development of spacecraft pyroshock technique[J].Journal of Astronautics,2014,35(12):1339-1349.
[3] 武新峰,刘观日,雷勇军,等.基于LS-DYNA的包带式星箭连接装置分离过程和冲击响应分析[J].振动与冲击,2013,32(24):174-179.WU Xinfeng,LIU Guanri,LEI Yongjun,et al.Separation process and shock response analysis of clamp band systems based on LS-DYNA[J].Journal of Vibration and Shock,2013,32(24):174-179.
[4] 黄含军,王军评,毛勇建,等.爆炸螺栓预紧力对冲击响应影响分析[J].振动与冲击,2015,34(16):166-169.HUANG Hanjun,WANG Junping,MAO Yongjian,et al.Influence of pretightening force of explosive bolts on impulse response[J].Journal of Vibration and Shock,2015,34(16):166-169.
[5] 毛勇建,李玉龙.爆炸分离冲击环境的模拟试验技术进展[J].导弹与航天运载技术,2007(4):37-44.MAO Yongjian,LI Yulong.Advances in simulation techniques of pyroshock environments[J].Missiles and Space Vehicles,2007(4):37-44.
[6] TAKEUCHI S,ONODA J.Estimation of separation shock of the marman clamp system by using a simple band-mass model[J].Transactions of the Japan Society for Aeronautical and Space Sciences,2002,45(147):53-60.
[7] TROSHEHENKO V T,PROKOPENKO A V.Fatigue strength of gas turbine compressor blades[J].Engineering Failure Analysis,2000,7:209-220.
[8] WARREN T L,SILLING S A,ASKARI A,et al.A non-ordinary state-based peridynamic method to model solid material deformation and fracture[J].International Journal of Solids & Structures,2009,46(5):1186-1195.
[9] 程曙霞.工程试验理论简明教程[M].合肥:中国科学技术大学出版社,2000.
[10] 宁鹏飞,唐德高.自然通风隧道内爆炸冲击波传播特性研究[J].振动与冲击,2014,33(24):172-176.NING Pengfei,TANG Degao.Blast shock wave propagation characteristics in a natural ventilation tunnel[J].Journal of Vibration and Shock,2014,33(24):172-176.
[11] LANGLET A,SOULI M,AQUELET N,et al.Air blast reflecting on a rigid cylinder:simulation and reduced scale experiments[J].Shock Waves,2015,25(1):47-61.
[12] 孙晨.状态方程和本构模型在超高速碰撞数值仿真中的影响[D].辽宁:辽宁大学,2011.
[13] 谈庆明.量纲分析[M].合肥:中国科学技术大学出版社,2005.
[14] 李兵,陈曦,杜忠华,等.LEFP对带壳装药冲击起爆过程的数值模拟与试验[J].含能材料,2016,24(11):1034-1039.LI Bing,CHEN Xi,DU Zhonghua,et al.Numerical simulation and experimental study of LEFP on impact initiation process of charge with shell[J].Chinese Journal of Energetic Materials,2016,24(11):1034-1039.
[15] 李宇.削弱槽式爆炸螺栓的结构设计及作用过程的数值分析[D].南京:南京理工大学,2010.
[16] 经福谦.实验物态方程导引[M].北京:科学出版社,1999.
[17] 张若棋.平面飞片在接触爆炸推动下的运动规律[J].国防科技大学学报,1978(4):69-80.ZHANG Ruoqi.Under the contact explosion promote of the to the plane motion[J].Journal of National University of Defense Technology,1978(4):69-80.
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