具有攻角杆条破片对薄靶侵彻能力研究
关键词 杆条破片 极限穿透速度 攻角 跳飞 Title Calculate and investigate for rod fragments with attack angle when penetrating into target
Abstract
This paper uses finite element analysis software and theoretical calculation to investigate capacity of rod fragments penetrating into target and relationship of incident angle and attack angle for rod to penetrating and ricochet into target.Firstly, Analyzing effective factors of rod fragments penetrating and ricochet into target, and establishing the theoretical model. All sorts of attitude calculated to target the article stem board impact and penetration process, the calculation results show that: When incident-angle is const, limit penetration velocity increases as attack-angle increases. When attack-angle is const, limit penetration velocity increases as incident-angle increases. When attack-angle is from 0° to 90°, critical penetrate incident-angle decreases as attack-angle increases. When attack-angle is from -90° to 0°, critical penetrate incident-angle increases as attack-angle increases.
Keywords: Rod fragments limit penetration velocity attack-angle ricochet
目 次
1 绪论 1
1.1 研究背景及意义 1
1.2 国内外研究状况 2
1.2.1 理论研究 2
1.2.2 数值模拟 6
1.2.3 实验法 7
1.3 本文主要研究内容 8
2 影响杆条破片侵彻能力的因素及有限元模型建立 9
2.1 影响杆条侵彻能力的因素分析 9
2.2 杆条破片及靶板参数 10
2.2.1 杆条破片 10
2.2.2 靶板 10
2.2.3 材料模型 10
2.3 有限元模型建立 12
2.3.1 ANSYS/LS-DYNA简介 12
2.3.2 定义单元类型 12
2.4 本章小结 14
3 杆条对平面靶板的姿态和侵彻过程研究 15
3.1 杆条对平面靶板的姿态分类 15
3.2 杆条着靶姿态的有限元仿真 18
3.2.1 状态Ⅰ 18
3.2.2 状态Ⅱ 19
3.2.3 状态Ⅲ 20
3.2.4 状态Ⅳ 21
3.2.5 状态Ⅴ 22
3.2.6 状态Ⅵ 23
3.2.7 状态Ⅶ 24
3.3 杆条对平面靶板的侵彻过程分析 25
4 杆条对平面靶板的侵彻能力计算 28
4.1 入射角和攻角对侵彻能力的影响 28
4.2 杆条对靶板的极限穿透速度模型 29
5 杆条对平面靶板的跳飞计算 32
5.1 入射角和攻角对杆条跳飞的影响 32
5.2 杆条对靶板的跳飞模型 33