【作者】 张琦；

【导师】 李俊；

【作者基本信息】 武汉理工大学 ， 船舶与海洋工程， 2023， 硕士

【摘要】 舰船是海军生存的重要平台,也是保护国家领土主权的重要手段,但在海战中也是敌人反舰武器的主要攻击目标。随着反舰武器精度和毁伤能力的不断提高,水面舰艇面临越来越严重的威胁。日用燃油柜是存储舰船动力所需燃料的关键设备。本文采用数值模拟和理论分析相结合的方法,深入研究了舱内爆炸载荷作用下日用燃油柜的毁伤情况。分析燃油柜的毁伤响应特性及规律,为日用燃油柜毁伤评估及结构防护提供参考,主要研究工作如下:首先,针对典型反舰武器“鱼叉”导弹爆炸过程进行数值仿真,基于SPH方法模拟了战斗部爆炸破片飞散特性,结合MOTT、Henrych公式,得出了“鱼叉”导弹战斗部的破片质量分布区间以及破片速度区间,基于ALE方法验证了数值仿真模拟冲击波传播的准确性,为后续燃油柜结构响应提供了准确的载荷输入。并分析了燃油冲击引燃的条件,本文选取的破片质量及速度范围不能造成燃油冲击引燃,同时分析了燃油柜结构特性,建立了燃油柜的有限元仿真模型。然后,针对上述有限元模型,建立了破片侵彻燃油柜的数值仿真模型,分析了破片对燃油柜的侵彻物理过程,开展了充水和充燃油的燃油柜侵彻对比仿真,分析了燃油柜内液体压力、燃油柜面板响应情况以及破片速度衰减情况。探究了破片速度、破片形状、破片入射角度以及燃油柜充液率对燃油柜毁伤效应的影响,发现随着破片速度增加,相同测点压力峰值增大,燃油柜前后面板最大挠度变形增大,破片形状对于燃油柜毁伤效应的影响不大,破片入射角度在5°时,燃油柜后面板的毁伤模式从冲塞破口转变为大挠度变形,60%以上充液率条件下燃油柜前面板在穿孔上下部分挠度变形不一致,且充液率越低,上下部分挠度变形差距越明显。通过线性回归方法得到了燃油柜前面板在不同角度下的最小穿透动能及极限穿透速度,为燃油柜结构的毁伤评估及优化设计提供相关理论数据。最后开展了冲击波载荷对燃油柜毁伤效应数值仿真研究,分析了燃油柜在冲击波载荷作用下的冲击波传播过程和面板结构响应过程,并分析了TNT药量以及燃油柜充液率对燃油柜毁伤效应的影响,发现TNT药量大于1000g时,燃油柜前面板的毁伤模式从整体大挠度变形转变为花瓣破口,燃油柜前面板挠厚比与TNT药量在呈线性关系,燃油柜前面板的毁伤模式在充液率为60%以上时为大挠度变形,在40%以下时为花瓣形破口。更多还原

【Abstract】 Ships are the platform for naval survival and an important means to protect the country’s territorial masters,but in naval battles,the enemy’s ship-building weapons are the main target of attack.Because it can be cured,it is also taken as well.Daily fuel tanks are a key fortification for storing fuel for the point of power required for ship power.This paper uses a combination of numerical simulation and theoretical subdivision to deeply study the explosion in the cabin and the damage of the fuel tank in the next day.In order to reveal the reference of fuel tanks,the main research work is as follows:Aiming at the numerical simulation of the detonation process of typical anti-ship Harpoon missiles,the flying characteristics of warhead explosion fragments simulated based on the Minning method are combined with the spies who list the fragmentation products of the "Harpoon" missile warhead in the area and fragmentation speed,and report them for the subsequent fuel cabinets.There is one,and so does it.A numerical simulation model of fragment penetration into a fuel tank was established based on the finite element model mentioned above.The physical process of fragment penetration into the fuel tank was analyzed,and comparisons between simulations with water-filled and fuel-filled tanks were conducted.The liquid pressure inside the tank,panel response,and fragment velocity attenuation were analyzed.The effects of fragment velocity,shape,impact angle,and liquid filling ratio on the damage to the fuel tank were explored.It was found that as the fragment velocity increased,the maximum pressure peak at the same measuring point increased,and the maximum deformation of the front and rear panels of the fuel tank increased.The fragment shape had little effect on the damage to the fuel tank.When the fragment impact angle was5°,the damage mode of the rear panel of the fuel tank changed from a blowout to a large deformation.With a filling ratio above 60%,the deformation of the upper and lower parts of the front panel of the fuel tank was inconsistent,and the difference in deformation increased with decreasing filling ratio.The minimum penetration kinetic energy and maximum penetration velocity of the front panel of the fuel tank at different angles were obtained using linear regression,providing relevant theoretical data for damage assessment and optimization design of fuel tank structures.Numerical simulations were conducted on the damage effects of shock wave load on fuel tanks.The shock wave propagation process and plate structure response of the fuel tank under shock wave load were analyzed.Multi-factor analysis was then conducted to explore the effects of TNT charge weight and liquid filling ratio on the damage effects of the fuel tank.It was found that when the TNT charge weight exceeded 1000 g,the damage mode of the front panel of the fuel tank changed from overall large deformation to petal-shaped blowout.The ratio of panel deflection to thickness had a linear relationship with the TNT charge weight.The damage mode of the front panel of the fuel tank was large deformation when the liquid filling ratio was above 60%,and petal-shaped blowout when it was below 40%.更多还原