子弹侵彻钢筋混凝土的数值模拟研究
摘要
随着有限元技术的飞速发展,运用计算机进行数值模拟已经成为一种重要手段,越来越广泛地应用于钢筋混凝土类坚固目标的侵彻问题研究。本文的工作是在参阅大量文献的基础上,运用成熟的有限元软件LS-DYNA程序,围绕钢筋混凝土靶板侵彻问题的数值模拟展开的。具体工作如下:
1、对钢筋混凝土侵彻问题进行了综述,分析讨论了混凝土侵彻问题研究的方法、国内外研究历史与现状,为后续工作奠定了基础。
2、对钢筋混凝土靶标的动态损伤破坏模式与数值分析中常用的混凝土动态本构模型进行了调研,分析了主要几种本构模型的适用范围与不足,确定了选择HJC作为本文开展数值计算的混凝土本构模型,并结合本文的研究确定了相应的混凝土动态模型参数。
3、建立详细的弹靶有限元模型,并分析比较了不同钢筋混凝土有限元模型对计算结果的影响,确定了适合本课题研究的钢筋混凝土有限元模型及算法。
4、针对攻角、倾角、着速、弹着点等弹道参数的变化对钢筋混凝土目标侵彻性能的影响开展了数值计算分析,总结了相关规律,并分析了子弹前后舱段对子弹侵彻性能的影响,对子弹设计具有重要指导意义。
5、结合试验研究进行了针对部分数值模拟工况的的验证性试验,得出了相关结论。
最后,对全文的研究进行了总结,并讨论了今后需要进一步深入研究的工作。
With the rapid development of finite element technology, using computer simulation has become an important tool, which has been applicated to research penetration of RC targets more and more widely. The main work of this paper is started around the problem of RC targets penetration simulation, based on extensive references and application of sophisticated finite element software LS-DYNA program.
The main works are as follows:
1. Summarizing the problem of RC penetration, analyzing and discussing method, research history at domestic and abroad and current research situation of RC penetration, the works above laid the foundation for the follow-up.
2. Researching dynamic damage and failure modes of RC targets and common dynamic constitutive models of concrete in numerical analysis, analyzing scope and shortcomings of several main dynamic constitutive models, choosing HJC as the numerical dynamic constitutive model, and identifying the corresponding dynamic constitutive mode parameters for the study of this paper.
3. Establishing the detail finite element model of projectile and target, comparing and analyzing the impact by the different finite element models of RC on the numerical results, and identifying the finite element model of RC and algorithm for this project.
4. Starting the numerical analysis around the impact on the penetration behavior of RC when the ballistic parameters which includes angle of attack, angle of trajectory inclination, speed, and attack point was changed, summarizing the relevant laws, and analyzing the impact by front and rear cabin on penetration behavior of missile, these are of great reference value for the missile design.
5. The verification tests were carried out for some numerical simulation conditions, and some relevant conclusions was drawn.
Finally, summarizing the full text studies, and discussing the works which need to be further researched in the future.
1、对钢筋混凝土侵彻问题进行了综述,分析讨论了混凝土侵彻问题研究的方法、国内外研究历史与现状,为后续工作奠定了基础。
2、对钢筋混凝土靶标的动态损伤破坏模式与数值分析中常用的混凝土动态本构模型进行了调研,分析了主要几种本构模型的适用范围与不足,确定了选择HJC作为本文开展数值计算的混凝土本构模型,并结合本文的研究确定了相应的混凝土动态模型参数。
3、建立详细的弹靶有限元模型,并分析比较了不同钢筋混凝土有限元模型对计算结果的影响,确定了适合本课题研究的钢筋混凝土有限元模型及算法。
4、针对攻角、倾角、着速、弹着点等弹道参数的变化对钢筋混凝土目标侵彻性能的影响开展了数值计算分析,总结了相关规律,并分析了子弹前后舱段对子弹侵彻性能的影响,对子弹设计具有重要指导意义。
5、结合试验研究进行了针对部分数值模拟工况的的验证性试验,得出了相关结论。
最后,对全文的研究进行了总结,并讨论了今后需要进一步深入研究的工作。
With the rapid development of finite element technology, using computer simulation has become an important tool, which has been applicated to research penetration of RC targets more and more widely. The main work of this paper is started around the problem of RC targets penetration simulation, based on extensive references and application of sophisticated finite element software LS-DYNA program.
The main works are as follows:
1. Summarizing the problem of RC penetration, analyzing and discussing method, research history at domestic and abroad and current research situation of RC penetration, the works above laid the foundation for the follow-up.
2. Researching dynamic damage and failure modes of RC targets and common dynamic constitutive models of concrete in numerical analysis, analyzing scope and shortcomings of several main dynamic constitutive models, choosing HJC as the numerical dynamic constitutive model, and identifying the corresponding dynamic constitutive mode parameters for the study of this paper.
3. Establishing the detail finite element model of projectile and target, comparing and analyzing the impact by the different finite element models of RC on the numerical results, and identifying the finite element model of RC and algorithm for this project.
4. Starting the numerical analysis around the impact on the penetration behavior of RC when the ballistic parameters which includes angle of attack, angle of trajectory inclination, speed, and attack point was changed, summarizing the relevant laws, and analyzing the impact by front and rear cabin on penetration behavior of missile, these are of great reference value for the missile design.
5. The verification tests were carried out for some numerical simulation conditions, and some relevant conclusions was drawn.
Finally, summarizing the full text studies, and discussing the works which need to be further researched in the future.
引文
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[10] S. Satapathy. Dynamic spherical cavity expansion in brittle ceramics[J]. Int.J. Solid & Structures, 2001, 39:5833---5845
[11] Scott B T, Park R and Priestley M IN. Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates[J]. ACII Journal, 1982, 79(10): 13-27.
[12] Dilger W H. Kod R and Kawalcryk R. Ductility of plain mad confined concrete under different strain rates[J]. AC1 Journal, 1984, 81(1). 73-81.
[13] Sukontasukkul A, Himityongskul P, Mindess 5. Effect of loading rate on damage of concrete[J]. Cement and Concrete Research, 2004, 34: 2127-2134.
[14]韩永要,赵国志.固连接异形侵彻体垂直侵彻半无限靶数值模拟.弹道学报.2004.Vol16. No3
[15]韩永要,赵国志,方清.伸出式侵彻体斜侵彻有限厚靶板数值模拟.弹箭与制导学报.2006.Vol.26. No4
[16]朱光辉.动能弹斜侵彻混凝土靶跳弹规律分析:[硕士论文],南京理工大学,200706.
[17] M.J.Forrestal, D.Y.TZOU. A Spherical cavity-expansion penetration model for concrete targets. Int. J. Solids Structures Vol. 34, Nos 31.32, pp. 4127-4146, 1997.
[18] Luk V K, Forrestal M J. Penetration into semi-infinite reinforced-concretetargets with spherical and ogival nose projectiles [J]. Int J Impact Engng, 1997, 6(4): 291-301.
[19]蔺建勋等.弹丸垂直侵彻土壤混凝土复合介质的理论分析模型.弹道学报.,1999.
[20]尹放林等.弹丸斜入射时侵彻深度的影响.爆炸与冲击,1998,18(1).
[21]王明洋等.弹体在钢钎混凝土介质中的侵彻深度工程计算模型.兵工学报,2002,23(1).
[22] Dr. Koon Meng Chua. GRDPEN : A Computer Program Predicting Performance of Single-stage and Multi-stage Rapid Ground Penetrators in Normal and in Oblique Impact, Department of Civil Engineering, University of New Mexico, Albuquerque, New Mexico 8713 t , USA. November 2001
[23] Michelle Crull, Linda Taylor, John Tipton, Estimating Ordnance Penetration into earth, U.S.Army Engineering & Support center, Huntsville
[24] Chang w S. Impact of solid missiles on concrete barriers. [J]Journal of Structural Engineering; 1981, 107(2):257-280
[25] Berard R S. Empirical analysis of projectile penetration in rock AD-AO47989, 1977
[26] Naval Weapons Laboratory, Mil. No. 1864, NAVVEPS NO. 8331 (1968)
[27] Degen P O. Perforation of reinforced concrete slabs by rigid missiles.[J]Journal of Structural Engineering, 1980,106(7): 1623-1642
[28] Haldar A, Miller F J. Local effects of concrete structures. Proceedings of Concrete Structure under Impact and Impulsive Loading. West Berlin, West Germany, 1982:345-357
[29] Haldar A, Hussein A H. Load effect of solid missiles on concrete structures. Journal of Structural Engineering, 1984,110(5):948-960
[30] Brandar K. Assessment of the response of RC structural member to aircraft crash impact loading. Nuclear Engineering and Design,1988.110:177-183
[31] Dancygier A N, Yankelevsky D Z, Jaegermaan C. Response of high performance concrete plates to impact of non-deforming projectiles. Int J Impact Engng, 2007 , 34. 1768-1779.
[32]周宁,任辉启,沈兆武等.侵彻锅筋混凝土过程中弹丸过载特性的实验研究[J].实验力学,2006,21(5):572~578
[33]周宁,任辉启,沈兆武等.弹丸侵彻混凝土和钢筋混凝土的实验.[J]中国科学技术大学学报.2006.36(10):1021
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