摘要：当今世界，海洋成为各国非常重视的战略资源，保护和开发海洋已成为共识。因海洋而存在的船舶为人类作出了巨大的贡献。在各国争先利用海洋资源之时，不可避免的发生枪火冲突，鱼雷、反舰导弹等武器对舰船的安全构成严重威胁。因为舰船生活在水上，一旦受到破坏，船上人员的安全风险远远大于地面上。世界各国深刻认识到这一点。国内外的学者们基于提升船体的保护能力，做过大量的相关工作，在这些工作的基础上船体抗侵彻能力不断得到加强。

本文进行的主要工作有：一、按照课题要求，总结舷侧结构特点和国内外抗弹性研究现状。二、基于简化、科学原则，对水下侵彻系统进行建模仿真。三、结合论文的研究内容，设置不同的模型，在不同的工况下进行仿真，得到原始数据。四、基于不同的研究目的将原始数据进行分类总结。得到水下侵彻系统的侵彻

情况，总结船体侧舷的侵彻特性和影响因素。

关键词：抗弹性、数值模拟、临界速度、水下侵彻

Abstract：In today's world, the oceans become a strategic resource that countries attach great importance to, and the protection and development of the oceans has become a consensus. The ships that exist by the oceans have made a great contribution to mankind. In the country when the first use of marine resources, the inevitable occurrence of fire and fire, torpedoes, anti-ship missiles and other weapons on the safety of the ship poses a serious threat. Because the ship lives on the water, once the damage, the safety of the safety of the ship is far greater than the ground. The world is deeply aware of this. Scholars at home and abroad based on the ability to enhance the protection of the hull, done a lot of related work, on the basis of these work on the hull anti-penetration ability has been strengthened. The main work of this paper is:

First, according to the requirements of the project, summed the characteristics of the side of the structure and the status quo of anti-elasticity at home and abroad.

Second, based on simplification, scientific principles, underwater penetration system modeling and simulation.

Third, combined with the research content of the paper, set up different models, in different conditions under the simulation, get the original data.

Fourth, based on different research purposes to sort out the original data. The penetration of the underwater penetration system is obtained, and the penetration characteristics and influencing factors of the hull side are summarized.

Key words: elasticity, numerical simulation, critical velocity, underwater penetration

目录

第一章绪论 1

1.1研究背景及意义 1

1.2穿甲问题概述 2

1.3高速侵彻体对舷侧防护结构的破坏作用机理 2

1.4国内外研究现状 4

1.4.1舷侧结构设计 4

1.4.2地面抗弹性研究 5

1.4.3水下抗弹性研究 7

1.5研究现状分析 9

第二章水下侵彻仿真的基本理论 10

2.1LS-DYNA简介 10

2.2穿甲问题数值算法 10

2.2.1高速碰撞下材料的失效和破坏 10

2.2.2接触—碰撞界面算法 11

2.3流固耦合数值算法