爆炸作用下RHT模型参数敏感性分析
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摘要
混凝土RHT本构模型广泛应用于机场跑道等重要军事目标的材料动态力学响应过程的数值模拟,其本构参数的取值直接影响计算结果的准确度。论文定义了无量纲形式的敏感度函数,针对RHT本构模型参数进行了敏感性分析,确定了爆炸过程模型参数的敏感度,分析结果为数值模拟和试验方案优化设计提供了参考依据。
The RHT concrete model has been widely used in numerical simulation of dynamic mechanical response process of the airport runway and other important military targets. The parameter value of constitutive model will directly affect the accuracy of the results. Aimensionless form of sensitive function is defined in this paper. Based on the the sensitivity analyses of the RHT constitutive model,the sensibility of model parameters is determined. Analysis results have important reference value to the numerical simulation and optimal design of experiment.
The RHT concrete model has been widely used in numerical simulation of dynamic mechanical response process of the airport runway and other important military targets. The parameter value of constitutive model will directly affect the accuracy of the results. Aimensionless form of sensitive function is defined in this paper. Based on the the sensitivity analyses of the RHT constitutive model,the sensibility of model parameters is determined. Analysis results have important reference value to the numerical simulation and optimal design of experiment.
引文
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[9]查文华,洪宝宁.路基水泥稳定碎石的压缩特性试验与分析[J].低温建筑技术,2007,115(1):9-11.
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[14]AUTODYN v4.2 user manual[M]. California:Century Dynamics Inc,2001:1-5.
[2]曾必强,姜春兰,王在成等.反跑道动能弹斜侵彻机场多层跑道的三维数值模拟[J].兵工学报,2007,28(12):1433-1437.
[3]Riedel W,Thoma K,Hiermaier S. Penetration of reinforced concrete by BETA-B-500-numerical analysis using a new macroscopic concrete model for hydrocodes[C]//Proceedings of 9th International Symposium on Interaction of the Effect of Munitions with Structure,Berlin-Strausberg,Germany,1999:315-322.
[4]Lepp?nen J. Experiments and numerical analyses of blast and fragment impacts on concrete[J]. International Journal of Impact Engineering,2005,31(7):843-860.
[5]Nystr?m U,Gylltoft K. Numerical studies of the combined effects of blast and fragment loading[J]. International Journal of Impact Engineering,2009,36(8):995-1005.
[6]Tu Z,Lu Y. Modifications of RHT material model for improved numerical simulation of dynamic response of concrete[J]. International Journal of Impact Engineering,2010,37(10):1072-1082.
[7]Nystr?m U,Gylltoft K. Comparative numerical studies of projectile impacts on plain and steel-fibre reinforced concrete[J]. International Journal of Impact Engineering,2011,38(2-3):95-105.
[8]张若棋,丁育青,汤文辉等.混凝土HJC、RHT本构模型的失效强度参数[J].高压物理学报,2011,25(1):15-22.
[9]查文华,洪宝宁.路基水泥稳定碎石的压缩特性试验与分析[J].低温建筑技术,2007,115(1):9-11.
[10]孙兆辉,王铁斌,许志鸿等.水泥稳定碎石强度影响因素的试验研究[J].建筑材料学报,2006,9(3):285-290.
[11]蒋应军,王富玉,刘斌.水泥稳定碎石强度特性的试验研究[J].武汉理工大学学报,2009,31(15):52-57.
[12]章光,朱维申.参数敏感性分析与试验方案优化[J].岩土力学,1993,14(1):51-88.
[13]Willam K J,Warnke E P. Constitutive model for the triaxial behavior of concrete[C]//Proceedings of IABSE Seminar on Concrete Structure Subjected to Triaxial Stresses,Bergamo:IABSE,1975:1-30.
[14]AUTODYN v4.2 user manual[M]. California:Century Dynamics Inc,2001:1-5.