毕业论文移动版

摘要船舶作为现代水上主要交通运输工具，并且在现代战争中，海面是很重要的战场， 而舰船则是该战场的主力，是海军部队赖以生存和发动攻击的平台，同时也是主要的 受攻击对象。所以，不可避免地会遭受各种弹体和撞击物的冲击载荷，舷侧防护结构 的抗侵彻与抗爆炸性能也关系着船舶在水面上的生存能力。因此，只有掌握舷侧结构 的抗侵彻性能，才能使其发挥自身的抗侵彻能力。79362

本文首先通过 LS-DYNA 软件，对弹体撞击 45#钢板的动态过程进行数值仿真， 刚性弹体冲击钢板的实验结果通过与文献中实验结果进行对比，证实数值模拟弹体撞 击钢板有限元分析是可靠的。然后通过介绍靶板侵彻的相关理论，主要包括侵彻的定 义、侵彻的分类、靶板分类、靶板变形及失效形式。主要分析数值模拟结果中钢板失 效模式以及剩余速度曲线，重点分析了单层钢板、双层钢板及夹间板间以及不同弹体 头部形状等参数并且总结了这些参数对钢板抗侵彻性能的影响。最后，建立了舷侧防 护结构模型，分析各参数对舷侧防护结构抗侵彻性能的影响。具体内容如下：

（1）对刚性圆头、平头弹体侵彻 45#钢板的动态过程进行数值仿真，将结果与 文献中实验结果进行对比，证明用有限元软件模拟侵彻问题是可靠的。

（2）使用 LS-DYNA 软件对 45#钢板在相应工况下进行数值模拟。主要分析数 值模拟结果中钢板抗侵彻过程图像和失效形式以及仿真结果中得到的弹道极限和剩 余速度曲线，同时重点分析了钢板的分层效应、钢板层间间隙以及不同弹体头部形状 等参数对钢板结构抗侵彻性能的影响。

（3）使用 LS-DYNA 有限元软件，根据文献中舷侧防护结构相关参数，建立对 应的仿真计算模型，并完成不同弹头形状的弹体侵彻舷侧结构全过程的数值模拟。

毕业论文关键词：舰船舷侧；有限元分析；初始-剩余速度；抗侵彻性能

Abstract Ship as a water main transportation tool and in the modern war, the sea is very important battlefield, while the ship is the battlefield of the main, is the survival of naval forces and launch an attack platform, is also the main attack object。 So, can not avoid inevitably suffer various projectiles and impact loads, broadside protection structure of anti penetration and anti explosion performance was also the viability of the ship in the water。 Therefore, only then grasps the anti penetration capability of the hull structure, in order to make it play its anti penetration ability。

Firstly by the software of LS-DYNA, the dynamic process of projectile penetrating 45# plate of numerical simulation, the plate impacted by a rigid projectile experiments results through with the literature experimental results were compared and confirmed by numerical simulation of projectile impact plate finite element analysis is reliable。Then through the introduction of the relevant theories of target penetration, including the definition of penetration, penetration classification, target classification and target plate deformation and failure mode。Mainly analyze the numerical simulation results in plate failure mode and residual velocities curve, focusing on analysis of the single layer plate, double layer plate and the clamping plate and different projectile  nose shape parameters and summarizes the effects of these parameters on plate anti penetration performance。Finally, a broadside protection structure model, analyzed the factors influencing the anti penetration performance of broadside protective structure。Specific content as follows:

(1)The dynamic process of hemispherical-,blunt-nosed projectile penetrating 45# plate for numerical simulation。 The results with the literature experimental results were compared and proved by using finite element software to do simulation penetration is reliable。 (责任编辑：qin)