LS-DYNA高速侵彻混凝土弹体质量损失特性研究
关键词 高速侵彻 质量损失 混凝土 数值模拟
毕业论文设计说明书外文摘要
Title The Mass Loss Effect Study On The High Velocity
Penetrating Into Concrete Targets
Abstract
As the projectile penetration target protection ability gradually improve, the penetration of concrete material and performance requirements of projectile subsequently improve too. At present, the research on high speed penetration warhead to achieve penetration is one of the major technical way can be realized，But with the improvement of penetration velocity, penetration warhead damage or failure may occur，Therefore, research on the projectile in the process of concrete under the condition of high speed penetration shot body mass loss is very necessary。
In this paper， the projectile penetration of concrete described in the whole process is pided into three stages, stage of open pit, penetration stage of quality loss and no penetration stage of quality loss and analyze the three stages and calculation Respectively. The results show that the quality loss caused due to change shape warheads accounts for a large proportion，This paper uses Ls-dyna finite element analysis software to simulate high-speed projectile penetration，and chooses three different shapes and three different penetration warhead simulation analysis and calculation speed.
Keywords High-velocity，penetration，Mass-loss，Concrete，Numerical Simulation
目 录
1 绪论 2
1.1 研究背景及意义 2
1.2 国内外对高速侵彻问题的研究现状及发展趋势 4
1.2.1 弹体高速侵彻混凝土的研究现状 4
1.2.2 弹体高速侵彻混凝土的研究 6
1.2.3 弹体高速侵彻混凝土研究和发展方向 7
1.3 本文的主要工作 8
2 分析高速条件下弹体的侵彻作用 9
2.1 弹体质量损失分析 9
2.2 侵彻过程分析 10
2.3 基本假设 11
2.4 建立基本方程 11
2.4.1 由动量定理建立方程 11
2.4.2 弹体质量变化方程 12
2.4.3 弹体侵彻各阶段方程 14
2.4.4 侵彻质量损失计算及分析 15
2.5 本章小结 16
3 弹体高速侵彻混凝土的数值模拟 17
3.1 引言 17
3.2 LS-DYNA软件简介及算法 18
3.2.1 LS-DYNA动力学分析软件简介 18
3.2.2 LS-DYNA基本算法 18
3.3 侵彻弹靶的几何模型 19
3.3.1 弹体模型 20
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