混凝土HJC模型抗侵彻参数敏感性数值模拟研究
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摘要
混凝土是一种应用广泛的复合材料,其动态性能及抗侵彻毁伤效应的研究越来越依赖于数值模拟,其中混凝土HJC模型是应用最广泛的本构模型之一。在介绍HJC模型的基础上,应用LS-DYNA数值模拟方法进行HJC本构模型抗侵彻性能的参数敏感性研究,通过大量数值模拟得出HJC模型的抗侵彻敏感参数有:无侧限单轴抗压强度fc、压实点压力plock、特征化粘性强度A、特征化压力硬化因子B和压力硬化指数N。在混凝土的抗侵彻数值模拟过程中,重点是确定敏感参数的取值,以提高数值模拟的精度和质量,做到合理地选择试验方法和安排试验量。
Concrete is a widely used composite.The study of dynamic performance and anti-penetration effects on concrete is dependent on the numerical simulation,and the HJC model is often used in numerical simulations.On the basis of introduction about HJC model,parameter sensitivity analysis on HJC model by LS-DYNA numerical simulations is studied in the paper.There are five parameters(fc,plock,A,B and N) are sensitive.According to the sensitivity parameters,it can improve the accuracy and quality of numerical simulation and the reasonable test methods and arrangements for testing chosen.
Concrete is a widely used composite.The study of dynamic performance and anti-penetration effects on concrete is dependent on the numerical simulation,and the HJC model is often used in numerical simulations.On the basis of introduction about HJC model,parameter sensitivity analysis on HJC model by LS-DYNA numerical simulations is studied in the paper.There are five parameters(fc,plock,A,B and N) are sensitive.According to the sensitivity parameters,it can improve the accuracy and quality of numerical simulation and the reasonable test methods and arrangements for testing chosen.
引文
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[2]Johnson G R,Cook W H.Fracture characteristics of three metals subjected to various strain,strain rates,temperaturesand pressures[J].J Eng Fract Mech,1985,21(1):31-48.
[3]Livermore Software Technology Corporation.LS-DYNA Keyword User's Manual[Z].American:Livermore SoftwareTechnology Corporation,2001.
[4]Marsh S P.LASL Shock Hugoniot Data[M].California:University of California Press,1980.
[5]Wang D W,Gao H Q,Du H X,et al.The analysis and simulation of penetrating movement of oblique projectile[J].Journal of Projectiles,Rockets,Missiles and Guidance,2006,26(3):121-123.(in Chinese)汪德武,高洪泉,杜海霞,等.斜侵彻弹体运动分析与仿真[J].弹箭与制导学报,2006,26(3):121-123.
[6]Feng G Z.The numerical simulation&analysis of penetration against concrete targets using ANSYS/LS-DYNA[D].Beijing:Institute of Engineering Mechanics,China Earthquake Administration,2006.(in Chinese)冯国忠.基于ANSYS/LS-DYNA的混凝土靶板侵彻问题的数值模拟与分析[D].北京:中国地震局工程力学研究所,2006.
[7]Zheng Z H,Yu W L,Wang T.Numerical analysis of the EPW penetration into high strength concrete target[J].Journal of Projectiles,Rockets,Missiles and Guidance,2008,28(3):144-147.(in Chinese)郑振华,余文力,王涛.钻地弹侵彻高强度混凝土靶的数值模拟[J].弹箭与制导学报,2008,28(3):144-147.
[8]Jiang H,Wang J J.Investigation on failure index of concrete in the projectile perforation simulation[J].Journal ofVibration and Shock,2009,28(8):30-35.(in Chinese)姜华,王君杰.弹体侵彻混凝土数值模拟失效指标研究[J].振动与冲击,2009,28(8):30-35.
[9]Zhang F G,Li E Z.A method to determine the parameters of the model for concrete impact and damage[J].Journalof Ballistics,2001,13(4):12-17.(in Chinese)张凤国,李恩征.混凝土撞击损伤模型参数的确定方法[J].弹道学报,2001,13(4):12-17.
[10]Cui W F.Investigation on numerical simulation of penetration into concrete target[D].Changsha:National Universityof Defense Technology,2003.(in Chinese)崔伟峰.动能弹丸侵彻混凝土的数值模拟研究[D].长沙:国防科学技术大学,2003.
[11]Chen J L,Li X D,Liu K X.Experimental research on parameters of constitutive model for a cement mortar[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2008,44(5):689-694.(in Chinese)陈建林,李旭东,刘凯欣.素混凝土本构模型参数的实验研究[J].北京大学学报(自然科学版),2008,44(5):689-694.
[12]Li Y H.Sensitivity analysis of rock and soil parameter[J].Guangzhou Architecture,2000,2:34-38.(in Chinese)李艳华.岩土参数敏感性分析[J].广州建筑,2000,2:34-38.
[13]Hanchak S J,Forrestal M J,Young E R,et al.Perforation of concrete slabs with 48MPa(7ksi)and 140MPa(20ksi)unconfined compressive strengths[J].Int J Impact Eng,1992,12(1):1-7.
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