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摘 要 舰船作为现在海战的主要攻击武器，其生命力是非常重要的。舰船的抗冲击性能直接关乎到舰船的生命力，因此如何提高舰船的抗冲击性能具有非常重大的意义。 本文应用非线性有限元方法对某大型舰船典型舱段的舷侧结构在水下爆炸冲击波载荷作用下的抗冲击性能进行研究。论文具体内容如下： 首先在阅读大量文献的基础上对舷侧结构在水下爆炸载荷作用下动态响应的研究方法和研究现状进行详细分析。并介绍了水下爆炸的物理现象和声—结构耦合理论在水下爆炸的应用。 其次详细地介绍了用命令流的方式在ANSYS软件中建立舰船典型舱段以及舷外流场的过程和在ABAQUS 软件中进行数值模拟的详细步骤。 最后，为了验证模型建立的正确进行了模态分析。然后通过控制药量、爆炸距离、板厚这三个变量，对比舷侧外板与内板的响应，舷侧迎爆面与背爆面的响应，垂向结构甲板、内底板、舷侧外板的响应以及舷侧外板、肋板、甲板、内底板、外底板整体结构的响应，从而详细地研究了舰船舷侧的抗冲击性能，并得出了一些结论。 58413
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毕业论文关键词：舷侧结构；水下爆炸；动态响应；数值模拟；抗冲击性Abstract As the main attack weapon of naval battle, the life force is very important. The resist impact of the ship is directly related to the vitality of the ship, so how to improve the resist impact of the ship is of great significance. In this paper, the model of broadside defensive structure of a large-scale surface warship is used to study its defensive effect and dynamic responses under the actions of underwater explosions by using the non-linear finite approach. The specific contents of the thesis are as follows: First, in the reading massive literature foundation of hull structure under water explosion load under the action of dynamic response of the research methods and research status of detailed analysis. And this paper introduces the application of the physical phenomena and acoustic structure coupling theory of underwater explosion in underwater explosion. In detail introduced the command stream in ANSYS software to establish typical ship cabin and outboard flow process, and a detailed account of the detailed steps of numerical simulation in ABAQUS software. Finally, in order to validate the model established correctly modal analysis. And then through the control of drugs, from the explosion, the thickness of the board the three variables, contrast broadside plate and the inner plate of the response, the flank attack flameproof surface and back blast side response, vertical to the deck structure, floor, broadside plate response and broadside plate, floors, deck, bottom, response of the whole structure of the bottom plate, thus detailed studied resist impact of shipboard side, and some conclusions are drawn.
Key words: side structure; underwater explosion; dynamic response; numerical simulation; resist impact
目 录
第一章 绪论 . 1
1.1 研究目的及意义 .. 2
1.2.1 舰船在水下爆炸载荷作用下动响应研究方法 ... 2
1.2.2 舰船结构在水下爆炸载荷作用下动响应研究综述 ... 2
1.3 论文主要工作 .. 4
第二章 水下爆炸理论及声-结构耦合理论 ... 6
2.1 引言 .. 6
2.2 水下爆炸物理现象 .. 6
2.2.1 爆轰过程和冲击波 ... 6
2.2.2 水下爆炸冲击波 ... 7
2.2.3 冲击波压力峰值经验公式 ... 9
2.3 声-结构耦合理论 ... 10
2.3.1 引言 . 10
2.3.2 基本控制方程 . 10