| 冲击作用下混凝土中应力波传播规律的数值模拟 |
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| 引用本文： | 郭弦,卢芳云,陈荣,于鹏. 冲击作用下混凝土中应力波传播规律的数值模拟[J]. 北京理工大学学报, 2016, 36(S1): 178-182 |
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| 作者姓名： | 郭弦 卢芳云 陈荣 于鹏 |
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| 作者单位： | 西北核技术研究所, 陕西, 西安 710024,国防科技大学理学院, 湖南, 长沙 410073,国防科技大学理学院, 湖南, 长沙 410073,西北核技术研究所, 陕西, 西安 710024 |
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| 摘 要： | 建立了混凝土中应力波传播的统一经验表达式.采用混凝土JH本构模型对冲击作用下混凝土中应力波的一维、轴对称和球对称传播过程分别进行数值模拟，并通过混凝土中一维应力波传播实验对数值计算结果的可靠性进行验证.数值模拟研究表明：由于材料耗散和几何衰减的共同作用，混凝土中应力波在传播过程中峰值迅速衰减，应力波峰值小于混凝土抗压强度后，应力波峰值的进一步衰减主要是几何衰减的作用结果；所建立的经验表达式可以较好地描述混凝土中应力波传播规律，对于所选用的混凝土，应力波在其内部传播时的衰减系数为0.095 13.
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| 关 键 词： | 应力波传播 衰减系数 数值模拟 混凝土 |
| 收稿时间： | 2016-03-26 |
Numerical Simulation of Stress Wave Propagation in Concrete Structure Under Impact Loading |
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| GUO Xian,LU Fang-yun,CHEN Rong and YU Peng. Numerical Simulation of Stress Wave Propagation in Concrete Structure Under Impact Loading[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2016, 36(S1): 178-182 |
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| Authors: | GUO Xian LU Fang-yun CHEN Rong YU Peng |
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| Affiliation: | Northwest Institute of Nuclear Technology, Xi''an, Shanxi 710024, China,College of Science, National University of Defense Technology, Changsha, Hunan 410073, China,College of Science, National University of Defense Technology, Changsha, Hunan 410073, China and Northwest Institute of Nuclear Technology, Xi''an, Shanxi 710024, China |
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| Abstract: | A formula was constituted to describe the process of stress wave propagation in concrete. Numerical simulations were carried out to analyze the process of stress wave propagation in concrete under blast loading. JH model was adopted in the simulations to describe the constitutive activity of concrete. The reliability of numerical simulations was verified by experimental measured data. It is shown from the numerical simulations that the peak value of the stress wave will attenuate sharply as the wave propagate in the concrete structure. Both material dissipation and geometric dispersion lead to the attenuation. When the peak value is less than the compressive strength of concrete, geometric dispersion is the main cause to attenuation. The formula can describe the process of stress wave propagation in the concrete properly. The attenuation coefficient of the concrete studied in the article is 0.095 13. |
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| Keywords: | stress wave propagation attenuation coefficient numerical simulation concrete |
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