新型三浮筒Windsea式半潜浮式风电基础结构数值研究

发布时间：2018-05-23 20:48

本文选题：半潜浮式平台 + 水动力性能　；参考：《中国海洋大学》2014年硕士论文

【摘要】：风电经多年发展已经形成了重要的社会、经济效益，然而陆地资源是有限的，风电由陆上向海上发展是一个必然的趋势。我国海上风电的研究起步较晚，目前研究和应用集中于近海的固定式海上风电，对于科技含量最高的浮式风电的研究比较少。本文针对我国南海海域海况条件设计了一种装机容量达到3×（3~3.6）MW的新型半潜浮式风电基础，在传统的半潜浮式基础底部增加了三个浮筒的设计用以增大排水体积和加强整体结构强度。浮式基础的水动力性能、环境运动响应、锚泊系统设计、装机容量及完整稳性和破舱稳性是本文的重要研究内容，具体开展了以下工作： 1.参考挪威最新研究的新型海上浮式风电基础结构Windsea，基于国内某型号风机算出的上部气动荷载及风机塔筒质量等基本要素，详细设计了三浮筒半潜式浮式基础结构的主要的浮筒、立柱排水尺寸和整体结构形式，通过GeniE建立完成浮式风电模型，并导出多种类型的有限元模型用于频域、时域分析。 2.文中利用HydroD分析浮式基础的水动力性能，通过对整体结构形式、尺寸的调整以及压水板的设计，能够使本文所设计的新型半潜浮式平台水动力性能明显优于传统半潜浮式风电平台，浮式基础的纵摇、横摇及垂荡周期要远离南海波浪能量集中区，具有良好的耐波性，适宜在南海海域工作。 3.通过DeepC模块完成浮式风电系统在设计的系泊系统约束下的时域分析，，要求在短时预报周期内浮式风电系统六自由度位移、偏转响应符合国内外规范要求，设计的系泊系统钢缆强度满足海上风机安全运营要求。针对文中设计的浮式基础进行极限装机容量研究，分析出其最大承载能力。 4.稳性是平台性能指标的重要衡量标准，直接关系到造价昂贵的海上风机运行安全和对风资源的利用效率，文中针对浮式平台在各种海况下的整体稳性及破舱稳性展开研究，要求保证风机在工作海况下平稳运行，在极端海况、破舱条件下能够生存。本文所设计的三风机一体的新型半潜浮式结构平台，相对于国内半潜浮式风电平台的研究是一种创新，研究结果表明，文中设计平台水动力性能优越，耐波性能良好，3×3MW风电系统能够在有义波高不大于4.5m时安全发电，平台最大装机容量可达3×3.6MW，在50年一遇海况及任意两压载舱破损的情况依然能够保证风电系统的生存。这对我国近海乃至深海风电开发具有重要的参考价值。
[Abstract]:Wind power has formed important social and economic benefits after years of development. However, land resources are limited, and wind power development from land to sea is an inevitable trend. The research on offshore wind power in China is late. At present, the research and application of offshore wind power is concentrated in the offshore fixed type wind power, and the research on floating wind power with the highest scientific and technological content is less. In this paper, a new type of semi-submersible floating wind power foundation is designed for the sea conditions in the South China Sea of China. The installed capacity of the wind power is up to 3 脳 10 ~ 3 ~ 3.6MW. Three buoys are added to the base of the traditional semi-submersible floating foundation to increase the drainage volume and strengthen the overall structural strength. The hydrodynamic performance of floating foundation, the response of environmental motion, the design of mooring system, the installed capacity and the intact stability and the stability of damaged cabin are the important contents of this paper. The following work has been carried out in detail: 1. Referring to the new offshore floating wind power infrastructure, Windsea, which is recently studied in Norway, based on the basic elements of the upper aerodynamic load calculated by a certain type of domestic fan and the mass of the fan tower, the main buoys of the three-buoy semi-submersible floating foundation structure are designed in detail. The floating wind power model is built by GeniE and the finite element model is derived for frequency domain and time domain analysis. 2. In this paper, HydroD is used to analyze the hydrodynamic performance of floating foundation. The hydrodynamic performance of the new type of semi-submersible floating platform designed in this paper is obviously superior to that of the traditional semi-submersible floating wind power platform. The period of pitching, rolling and swaying of floating foundation is far from the South China Sea wave energy concentration zone and has good wave resistance. Suitable for working in the South China Sea. 3. The time domain analysis of floating wind power system under the constraint of mooring system is completed by DeepC module. It is required to predict the displacement of floating wind power system with six degrees of freedom in a short period of time, and the deflection response conforms to the requirements of domestic and foreign codes. The design of mooring system cable strength meets the safety operation requirements of offshore fan. The maximum load-carrying capacity of the floating foundation is analyzed by studying the limit installed capacity of the floating foundation designed in this paper. 4. Stability is an important measure of platform performance, which is directly related to the operation safety of expensive offshore fan and the utilization efficiency of wind resources. In this paper, the overall stability and damage stability of floating platform under various sea conditions are studied. It is required to ensure that the fan runs smoothly under the working sea conditions and can survive under extreme sea conditions and damaged conditions. Compared with the domestic semi-submersible floating wind power platform, the new semi-submersible floating structure platform designed in this paper is an innovation. The research results show that the hydrodynamic performance of the designed platform is superior to that of domestic semi-submersible floating wind power platform. The 3 脳 3MW wind power system can safely generate electricity when the mean wave height is less than 4.5 m, and the maximum installed capacity of the platform can reach 3 脳 3.6 MW. It can still guarantee the survival of the wind power system once in 50 years when the sea conditions and any two ballast tanks are damaged. This has important reference value for offshore and even deep sea wind power development in China.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU476

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