摘 要：一直以来，中国与邻国的领海争端不断，钓鱼岛、南沙群岛等问题牵动着国民的神经。南沙群岛海域蕴含这丰富的矿物资源，其中油气资源尤其丰裕有“第二个波斯湾”之称并且渔业资源异常丰饶，具有极高的经济价值。随着陆地资源的消耗，南海等海域的战略意义愈发重要。舰船是海上攻击、防御以及运载、生活的主要平台，其建造成本高昂，需要众多技术支持，是船上人员生活、安全的保障。因此，对于侵彻载荷作用下舰船舱壁结构动态响应的研究有着重要意义。

本文在分析、运用侵彻靶板理论的基础上利用瞬态动力学有限元分析软件MSC/DYTRAN进行数值模拟。先简单介绍侵彻靶板理论以及有限元技术发展，再对舱壁和破片进行网格划分建立模型，以不同的侵彻位置来确定多种计算工况，研究不同工况之下舱壁的动态响应、破坏特点和吸能特性以及破片侵彻舱壁后的剩余速度和剩余动能，然后从中选出最为危险的工况，再以侵彻速度不同来确定计算工况，比较分析计算结果并得出结论。

关键词： 有限元；破片；侵彻

ABSTRACT：All along, China has been in dispute with neighboring country about territorial sea, Diaoyu Island, Nansha Islands and other issues affecting the national nerves. The Nansha Islands waters contain rich mineral resources, especially oil and gas resources, which is known as "Second Persian Gulf". Fishery resources with high economic value are extremely rich. With the consumption of land resources, the South China Sea and others’ strategic significance is increasingly important. Ship is the main platform for attack, defense and living. It needs high cost and many technical support to secure the life of the crews. Therefore, it is very important to study the dynamic response of ship bulkhead structure under the action of penetrating load.

Based on the analysis and application of the penetration theory, numerical simulation is carried out by using the transient dynamic finite element analysis software MSC / DYTRAN. Firstly, the theory of penetration and the development of finite element technology are introduced. Secondly, the model is established by meshing the bulkhead and fragments. Thirdly, a variety of calculation conditions based on the different penetration position are determined to study the dynamic response, failure characteristics, energy absorption characteristics of the bulkhead under different working conditions and the velocity and residual kinetic energy of the fragments. Then, the most dangerous working conditions should be selected and more working conditions should be determined by different velocity of the penetration. Lastly, the results are compared and analyzed to come to a conclusion.

Keywords: FEM；fragment；penetration

目  录

第1章 绪论 1

1.1课题研究背景和意义 1

1.2侵彻国内外研究现状 2

1.2.1实验研究 2

1.2.2理论研究 3

1.2.3数值仿真研究 4

1.3本文研究内容 5

第2章 侵彻理论及数值模拟方法研究 6

2.1引言 6

2.2侵彻类型 6

2.3靶板分类 9

2.4靶板破坏形式 10

2.5弹体破坏形式 11

2.6有限元的发展历程 12

2.6.1 MSC/DYTRAN的由来 12

2.6.2显式时间积分法 13

第3章 破片侵彻舱壁的有限元分析研究 15

3.1引言 15

3.2破片和舱壁有限元模型 15

3.2.1本构模型的选取 15

3.2.2破片有限元模型 16

3.2.3舱壁有限元模型 18

3.3材料参数 19

3.4接触定义 19

3.5边界条件定义 19

3.6计算工况确定 20

3.7输出文件生成 21

3.8本章小结 22

第4章 侵彻载荷作用下舰船舱壁结构动态响应研究 23

4.1引言 23

4.2计算结果分析 23

4.2.1舱壁结构破坏模式 23

4.2.2不同侵彻点处舱壁结构和破片动态响应分析 23