【作者】 李林；

【导师】 王超营；

【作者基本信息】 哈尔滨工程大学 ， 力学， 2019， 硕士

【摘要】 船体振动是舰船结构失效的主要形式之一,对舰员的工作、生活,舰载设备的正常运行,以及舰船的战斗能力、生存能力,都有很大影响。对于船体结构局部振动,目前已有成熟有效的方法对其进行控制,而对于船体结构总振动,尚缺少有效治理方法。因此,舰船一旦出现总体振动问题,基本无法解决。调谐质量阻尼器是一种常用的制振装置,对于给定频率的减振效果非常明显。目前,调谐质量阻尼器也被逐渐被引入船舶与海洋工程领域,但还没有发现质量阻尼器在船体总振动控制中的应用。本文针对船体总振动问题,应用调谐质量阻尼器对其进行控制,结合简化模型验证分析与实体模型仿真分析,从质量阻尼器的质量与施设位置两个主要方面,分别对单重质量阻尼器、双重质量阻尼器以及碰撞质量阻尼器的制振能力开展研究,并得出一些具有工程实际意义的结论。建立船体梁验证分析模型与实船仿真分析模型,应用单重质量阻尼器控制其一阶固有频率下的水平与垂向弯曲振动。通过分析船体响应,考察单重质量阻尼器控制下的船体总振动是否符合扩展定点理论,以及施设位置与质量两个关键要素对质量阻尼器的振动控制效果的影响。选择不同位置施放质量阻尼器,考察关键节点响应以分析不同的施设位置对制振效果的影响;选择控制效果最好的位置,施设不同质量的质量阻尼器,考察关键节点响应以分析不同质量对制振效果的影响。应用双重质量阻尼器控制船体在一阶固有频率下的水平与垂向弯曲振动。选择最优位置施设双重质量阻尼器。通过分析船体响应,考察双重质量阻尼器装置控制下的船体总振动是否符合扩展定点理论,并对比单重质量阻尼器,考察相同总质量的双重质量阻尼器的制振效果。通过分析制振系统弹簧刚度、阻尼发生变化以及主振动系统固有频率改变等突发情况下的控制效果,考察双重质量阻尼器的控制稳定性。应用船体简化模型研究碰撞质量阻尼器对船体在垂向弯曲振动的一阶固有频率的控制。对于较大简谐激励力作用下的船体总振动进行分析,对比单重质量阻尼器,考察碰撞质量阻尼器是否具有更好的制振效果。并分析碰撞限位装置刚度以及弹簧刚度、阻尼系数等因素对碰撞质量阻尼器制振效果的影响。更多还原

【Abstract】 Hull vibration is one of the main forms of failure of ship structure,which has great influence on the work,life of crew,normal operation of shipborne equipments,as well as the combat ability and survivability of ships.At present,there are mature and effective methods to control the local vibration of the hull structure,but there is no effective control method for the total vibration of the hull structure.Therefore,once a ship has a total vibration problem,it can not be solved.Tuned mass damper(TMD)is a kind of commonly used vibration control device,which is very effective for a given frequency.Now,tuned mass dampers have been gradually introduced into the field of ship and marine engineering,but the application of them in the control of hull total vibration has not been found yet.In this paper,the TMD is used to control the total vibration of the hull,combining with the simplified model verification analysis and the simulation analysis of the solid model.From the analysis of the mass and the position of the TMD,the vibration control ability of single mass damper,mutiple tuned mass damper(MTMD)and pounding tuned mass damper(PTMD)is studied,and some practical conclusions are drawn.The verification analysis model of ship beam and the simulation analysis model of ship are established,and the horizontal and vertical bending vibration under the first order natural frequency is controlled by a single mass damper.Based on the analysis of ship hull response,this paper investigates whether the total vibration of the hull under the control of a single mass damper conforms to the extended fixed-point theory,and the influence of two key factors,the position and the mass,on the vibration control effect of the tuned mass damper.The response of key nodes was investigated to analyze the effect of different locations on the vibration control effect by selecting tuned mass dampers at different locations.In order to analyze the influence of different mass on the vibration control effect,the best control position is chosen,tuned mass dampers of different mass are applied and investigate the response of key nodes is investigated.Double mass dampers are used to control the horizontal and vertical bending vibration of a ship at first order natural frequencies.The optimum position is chosen to install double mass dampers.Based on the analysis of ship hull response,this paper investigates whether the total vibration of the ship under the control of the double mass dampers conforms to the extended fixed-point theory,and compares the vibration control effect of the double mass dampers of the same mass with that of the single mass dampers.The control stability of the double mass dampers is investigated by analyzing the control effect of the vibration system under the sudden conditions such as change of the spring stiffness,the damping coefficient and the natural frequency of the main vibration system.A simplified hull model is used to study the vertical bending vibration of a ship under the first order natural frequency by pounding tuned mass damper.The total vibration of hull subjected to large harmonic excitation force is analyzed and compared with that of a single mass damper to investigate whether the pounding tuned mass damper has a better vibration suppression effect.The effects of the stiffness of the impact limiter,spring stiffness and damping coefficient on the vibration control efficiency of the pounding tuned mass damper are analyzed.更多还原