LS-DYNA高速弹丸侵彻钢筋混凝土靶的规律研究
时间:2020-11-15 10:11 来源:毕业论文 作者:毕业论文 点击:次
| 本文介绍了动能弹侵彻钢筋混凝土的研究方法，对经验公式法、数值模拟法、理论分析法进行了总结，重点介绍了弹丸侵彻钢筋混凝土的工程解析模型，为仿真分析提供参考。 本文研究主要应用 LS-DYNA 有限元软件对动能弹侵彻钢筋混凝土实验进行了数值模拟，在确定 HJC 本构参数的基础上，分别对弹丸正侵彻不同配筋率的钢筋混凝土和弹丸斜侵彻进行了仿真计算，研究了不同配筋率对侵彻的影响以及弹丸斜侵彻的跳弹规律，并将实验值、理论值、仿真值以及经验公式计算值加以综合比较，结果显示了仿真计算的可行性，为实验设计提供数据支持。59541 毕业论文关键词 侵彻 钢筋混凝土 跳弹 HJC Title Study on The Law of Penetration into Reinforced Concrete Targets by High-velocity Projectiles Abstract The empirical formula method, numerical simulation method and theoretical analysis method for the research on the kinetic energy (KE) projectiles penetrating into reinforced concrete targets have been summarized in this paper to provide references for simulation. The engineering analytical model of reinforced concrete targets penetrated by projectiles is highlighted. In this paper, the experiments of KE projectiles penetrating into reinforced concretes were simulated using LS-DYNA finite element software. On the basis of HJC constitutive parameters verification, penetration into reinforced concrete with different reinforcement ratio and oblique penetration were simulated respectively for the study on the effect of different reinforcement ratio on penetration and the law of ricochet. The comparison results of the experimental values, the theoretical value, the simulation values, and the value of empirical formula illustrate that simulation in this paper is feasible and effective, also provide data for the design of experiments. Keywords penetration reinforced concrete ricochet HJC model 目录 1绪论..1 1.1论文的背景、目的和意义...1 1.2钢筋混凝土侵彻研究方法...1 1.3本文的总结思路及内容安排....3 2动能弹侵彻的经验公式和理论方法5 2.1经验与半经验公式5 2.2理论模型.9 2.3本章小结....14 3弹丸侵彻钢筋混凝土的建模15 3.1LS-DYNA软件介绍..15 3.2HJC本构介绍及参数确定..18 3.3建模分析....22 3.4本章小结....25 4弹丸侵彻钢筋混凝土的仿真计算..27 4.1动能弹深侵彻不同配筋率的钢筋混凝土..27 4.2动能弹斜侵彻钢筋混凝土.33 4.3本章小结....38 结论..39 致谢..40
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