【作者】 王连成；

【导师】 唐友刚；

【作者基本信息】 天津大学 ， 船舶与海洋结构物设计制造， 2008， 硕士

【摘要】 在恶劣海况下,工程驳船发生的摇荡运动严重影响驳船的作业,为防止摇荡导致船舶作业时出现事故造成巨大损失,对近海工程驳船自存及作业工况下的运动响应进行分析有着十分重要的意义。本文建立了悬链线方程,分析了悬链受力及方程的解法,并采用系泊缆的悬链线理论和方法预报单锚索系泊时系泊缆中的张力以及最小抛缆长度,完成了驳船风暴自存工况下的安全性计算分析。对船舶在波浪上横摇、横荡运动进行了计算分析。考虑吊物、风、浪及海流的作用,建立了八锚系泊状态船舶横摇及横荡运动分析模型,根据船舶在波浪中运动理论,开发了进行运动分析的计算机程序。考虑不同水深和不同系泊状态,以及不同的海洋环境,计算了风、波浪以及海流等因素作用下驳船的运动响应,得到了不同海域、不同风、浪、流作用下驳船的横摇、横荡运动响应幅值。通过Moses软件计算驳船的频域运动响应,建立了工程驳船运动响应计算的命令流,对作业工况下船舶的运动响应进行了预报,得到了驳船不同海况下的运动响应幅值。计算表明,按照本文方法计算得到的驳船运动结果与Moses软件计算结果基本一致。本文研究表明:采用本文提出的方法,预报驳船系泊状态下的运动响应完全可行。尤其对于多点系泊状态驳船运动响应的计算,本文方法计算简单,计算效率高,数据处理方便,不失为一种有效的预报系泊状态下船舶运动的工程方法。更多还原

【Abstract】 The large amplitude rolling which occurs for the engineering barge in high seas seriously affects the operating of barge. In order to prevent the accident causing huge losses, it is very important to analyse the motion response of the offshore engineering barge in storm survive and operation.In this paper, the author deduces the catenary curve’s equation, forecasts the tension in the mooring line and the minimum length of the mooring line in storm survival condition with the theory of catenary curve which help to achieve the security calculation of ship in storm survival condition.Also the ship’s response of rolling、swaying motion is analyzed and calculated. Considering the effects of lifting load, wind, wave and current, the author creat model of a ship with eight anchors in mooring states and developed programme for analysing ship’s motion with the motion theory of ship on wave. Through calculating motion response of ship with the effects of wind, wave, current and other factors, the author get the rolling and swaying amplitude of the ship in different seas and different mooring status.With the help of software Moses, the author create programming sentences for calculating in order to get the motion response in frequency domain. The calculation show that the results that we get from the two methods—Moses and traditional method are almost the same.The analyse of this paper indicates that it’s feasible to forecast the motion response of ship in mooring status with the method proposed in this paper, especially for multi-point mooring status. This method which is simple, efficient can be a effective engineering method for forecasting the motion of ship in mooring status.更多还原