【作者】 李在鹏；

【导师】 盛其虎；

【作者基本信息】 哈尔滨工程大学 ， 流体力学， 2010， 硕士

【摘要】 海洋潮流能是一种清洁的可再生能源,其利用价值高、潜力巨大。在大力发展新能源的今天,潮流能必将占有重要的席位。我国拥有漫长的海岸线,近海海域蕴含着丰富的海洋潮流能资源,开发前景广阔。目前,国内外已经建成的示范运行的潮流电站,其基本结构形式有漂浮式、悬浮式、桩柱支撑式和座海底式,选取特殊载体作为搭载水轮机和发电机组的工作平台。国内哈尔滨工程大学研建的70kW和40kW潮流实验电站采用了漂浮式和座海底式结构。由于潮流电站的生存环境十分恶劣,研究能够适应恶劣海洋环境的安全性和可靠性高、制造成本低和维护检修方便的潮流电站总体结构形式和定位系统,是潮流能利用向商业化发展的关键。本文探索并设计一种半潜式水平轴水轮机潮流发电系统方案。该系统由叶轮、载体平台(安装增速器和发电机)、稳定系统和锚泊系统组成,电站系泊于海床上。论文主要包括三方面工作:首先,进行了电站系统总体方案设计和系统布局研究,从稳性和浮态等因素进行分析计算,优化设计方案。然后,进行各种外载荷和运动性能研究,基于三维频域势流理论,应用Hydrostar水动力计算软件得到了不同浪向下电站系统的一阶辐射绕射力、一阶运动响应以及二阶漂移力,并分析数值结果,提出了设计时应注意的问题。再后,根据电站特点提出采用三根锚链布置,并按锚泊线成分比例的不同,设计了三种锚泊线方案,利用ARIANE7软件对系泊系统进行时域分析和方案对比。最后,给出最优方案在不同海况和工况下锚泊线及平台六自由度运动响应值,同时基于工作海床的状况和系泊性能要求,选取合理的抓力锚。论文研究表明,本半潜式潮流发电系统方案具有良好的抗风浪能力和运动性能,可作为一种优选方案进一步研究。更多还原

【Abstract】 Tidal power is a kind of renewable energy with high value and potential in use, which should take an important position in the society nowadays when fresh energy is greatly developed. Our country has a long coastline which is rich in tidal energy offshore with a good exploitation prospect.At present, the already running station examples in the world have several basic forms, such as floating structures, suspended structures, seabed piled structures and sit seabed structures, selecting a special carrier with hydraulic turbine and generating units. The domestic experimental 70kW and 40kW power stations of HRBEU use the floating structure and sit seabed structures. For the terrible working condition, the designing of structure and mooring system to ensure the station safe and reliable is the key to develop the commercial using of tidal power.The work which the article carries out is a kind of exploration about semi-submersible tidal current power station system design. The power station includes blades, carrier platform with generator, stabilization system and mooring system. This thesis has three parts: first, studying on the whole power station designing and system composition by stabilization and buoyancy calculation to choose the best design. Then base on the 3-D potential theory, first-order forces and moments, first-order motion and second-order draft forces under different wave headings are calculated by the software of HydroStar. And the problems which must be noticed have been put forward by analysis on above results. Last, according to the power station characteristic and the mooring line ingredient proportion’s difference, three schemes about mooring lines are presented. We give the forces and the result of movement about different mooring lines by using time domain analysis under different conditions with ARIANE7. On this basis, we give the optimum scheme. Finally, we select anchor base on seabed and berthing factors.The thesis results show that semi-submersible tidal current power station system design has good ability of resisting wind and wave, and also has good movement performance. It can be further studied as preferential design.更多还原