【作者】 黄旭；

【导师】 丁红岩；

【作者基本信息】 天津大学 ， 结构工程， 2012， 硕士

【摘要】 海上风电结构一体化安装技术实现了基础结构与塔筒及风机的海上整体安装,与传统的风电结构安装方法相比有较大优势。海上风电结构的浮运设计是海上风电结构一体化安装技术的一个重要组成部分,本文采用海洋工程设计软件MOSES气垫模块对风机运输船进行模拟,对风机运输船浮运影响因素进行分析,分析了风电机组结构浮态对风机运输船浮运的影响,同时对风电运输船的耐波性进行了研究。经过对比分析,风电运输船浮运过程中,当风电机组结构吃水增大,不利于浮运安全。当吃水在4m以下时,吃水深度对风电运输船浮运影响较小,因而吃水在4m可设为安全吃水深度。同时风电机组结构内外液面高度差越大,浮运越平稳,安全。但风电机组结构内外液面高度差应有一个限值,以保证风电机组结构有一定的水封高度(内液面高度),防止内部气体溢出,产生严重侧倾,影响风电运输船的浮运平衡。随浪浮运较顶浪浮运更平稳。在顶浪浮运时应保证风电机组结构内有一定的水封高度,防止风电机组结构内气体逸出,造成运输船倾覆。波高对风机运输船浮运有较大影响,当波高增大至接近极限波高时,钢吊缆张力突然变大同时舱内气压值变化剧烈。应通过对钢吊缆张力及舱内气压值的观测,对风机运输船在较大波浪作用下的稳定进行评估,及时采取相应措施保证浮运的稳定。在浮运作业时,海上风浪较小,可适当减小风电机组结构吃水,同时在保证舱内水封高度足够的情况下适当增大风电机组基础结构各舱内气压,从而使得风电运输船浮运更加平稳。当风电运输船需经受较大风浪时,为确保运输船的安全,需及时对风机运输船的浮态进行调整,此时需增大风电机组结构吃水同时减小风电机组基础结构各舱内的气压值,以保证舱内水封高度满足最小水封高度的要求。更多还原

【Abstract】 Integrated installation technology with offshore wind-power structure achieved the overall installation of foundation and wind turbines. This new installation method had greater superiority than the traditional installation method. The floating analysis is an important component of the integrated installation technology. In this paper, ocean engineering software MOSES was used to simulate the transport ship and the influence factors were analyzed. The effect of initial floating state of the transport ship and the seakeeping capability of the ship were studied.After a comparative analysis, during the floating of the wind-power structure transport ship, when the draft of wind turbine structure decreased, floating was more stable. When the draft was below 4m, the effect of draft of the wind turbine structure was not significant and the draft of 4m can be set as a safe draft. At the same time, when the draft difference between inside and outside wind turbine structure was greater, floating was more stable. But the draft difference should be limited to ensure the inside draft are deep enough which can prevent the overflow of the inner gas.The floating of the transport ship under following waves is safer than under head waves. During head waves, the inside draft of the wind turbine structure should be deep enough to prevent the overflow of the inner gas. The impact of wave height on towing force and vertical motion is great. When the ship was about to capsize, the tension of cable tension and the air pressure of the foundation changed abruptly which can help us to assess the condition of the ship. Some certain measures could be taken immediately.When the wind and wave are small, the draft of the wind turbine structure can be decreased and inner air pressure of the foundation can be increased to make the transport ship float more smoothly. However, when the wave height was more than 2m, the draft of the wind turbine structure can be increased and inner air pressure of the foundation can be decreased to ensure the height of inside draft, which is Critical for the safety of the transport ship.更多还原