【作者】 张扬；

【导师】 于大鹏；

【作者基本信息】 大连理工大学 ， 船舶与海洋结构物设计制造， 2022， 硕士

【摘要】 随着现代反舰武器的飞速发展,舰船受到水下非接触爆炸冲击的概率大大增加。由水中兵器爆炸产生的冲击波、气泡脉动等载荷不仅会对舰船结构造成严重破坏,还会对舰船武器系统、设备、管路以及舰上人员等产生较大冲击。因此,舰船水下非接触爆炸抗冲击研究成为各国关注的重点。近年来,我国海军舰船的抗爆抗冲击研究越发系统深入,舰船的抗冲击能力不断提升。其中,舰船管路系统作为舰船系统与设备的工作介质及能量输送通道,是舰载系统的重要组成部分,其具有大跨度、小刚度等特点,对水下非接触爆炸作用响应明显,因此,开展对舰船管路系统的抗冲击分析、设计具有重要意义。本文采用ABAQUS软件的声-固耦合计算分析模块,开展船体结构水下远场非接触爆炸冲击数值仿真分析,获取舰船爆炸冲击环境特性,并在此基础上开展了舰船管路抗冲击支吊架分析研究,相关研究方法及结果为舰船水下非接触爆炸冲击分析、设计提供了参考。本文主要研究内容如下:(1)介绍了水下非接触爆炸问题的相关基础理论。主要包括水下爆炸的物理现象、水下爆炸载荷的计算方法、舰船冲击环境的分析方法,为舰船结构水下远场爆炸冲击特性研究提供理论与方法准备。(2)研究ABAQUS软件声-固耦合模块相关计算方法,主要包括:构建冲击波载荷分析模型、建立计算域边界条件以及流-固耦合界面分析技术。在此基础上,对上述模型、方法等开展了数值仿真验证,证明了计算方法与过程的有效性与准确性。(3)开展了船体结构水下非接触爆炸冲击响应研究。分析了船体结构流-固耦合界面的冲击载荷能量输入特性及空化效应,总结了舱段结构在不同爆炸攻角、不同炸药深度以及不同炸药位置等情况下的冲击响应规律,为舰船冲击环境分析提供了技术基础。(4)开展了基于手性超材料结构的舰船管路抗冲击支吊架冲击特性研究。通过对比分析普通管路支吊架与基于手性超材料结构的新型管路支吊架两种管路系统模型的抗冲击与隔振性能,验证了新型舰船管路隔振抗冲击支吊架较传统支吊架的性能优势,为舰船管路系统抗冲击支吊架分析、设计等研究工作提供了有益借鉴。更多还原

【Abstract】 With the rapid development of modern anti-ship weapons,the probability of warships being impacted by non-contact underwater explosion has greatly increased.The shock wave and bubble pulses caused by explosion of underwater weapons will not only cause serious damage to the structure of warships,but also cause great impact on the weapon system,equipment,pipeline and personnel on the ship.Therefore,the research on the shock-resistance of the non-contact underwater explosion has become the focus of various countries.In recent years,the research on shock-resistance of warships in our country has been more and more important and systematic,and the capability of shock-resistance of warships has been increasingly improved.As the working medium and energy transmission channel of the system and equipment of warships,the pipeline system of warships is an important part of the shipborne system,which has the characteristics of large span,small stiffness and so on,and has obvious response to the non-contact underwater explosion.Therefore,it is of great significance to carry out the analysis and design of the shock-resistance of the pipeline system in the warship.In this paper,the acoustic-structure coupling calculation and analysis module of ABAQUS software was used for the numerical simulation of the ship structure subjected to far-field non-contact underwater explosion,and the characteristics of the shock environment of warships were obtained.On this basis,the shock-resistance pipeline hanger and support in warships were studied,and the related research methods and results provided a reference for the analysis and design of warships subjected to non-contact underwater explosion.The main contents of this paper were as follows:(1)The basic theory of non-contact underwater explosion was introduced,including the physical phenomenon and the calculation methods of non-contact underwater explosion,and the analysis methods of the shock environment of warships,which provided a theory and method for the study of the characteristics of ship structure subjected to non-contact underwater explosion.(2)The calculation method of acoustic-structure coupling module in ABAQUS software was studied,including the construction of analysis model of shock wave load,the establishment of boundary conditions of computational domain and the analysis technology of fluid-structure coupling interface.On this basis,the above models and methods were verified by numerical simulation,which proved the accuracy of the calculation methods and processes.(3)The shock response of ship structure subjected to non-contact underwater explosion was studied.The cavitation effect and the characteristics of shock load input of the fluidstructure coupling interface were studied,and the laws of shock response of the cabin structure under different angles of the explosion,different depths and positions of explosives were concluded,which provided a technical support for the analysis of the shock environment of warships.(4)The characteristics of shock-resistance of pipeline hanger and support in the warships based on chiral structure were analyzed.By comparing the performance of shock-resistance and vibration-isolation between the traditional pipeline hanger and support and the new pipeline hanger and support based on chiral structure,the advantages of the new pipeline hanger and support were proved,which provided an effective reference for the research of the shockresistance of pipeline hanger and support.更多还原