极浅水多体波浪能发电装置锚泊系统设计

发布时间：2018-12-11 22:32

【摘要】：采用三维势流理论对多体波浪能发电装置进行频域水动力计算,分析极浅水效应和多体间相互作用对单体发电装置的水动力性能影响。利用Orcaflex软件建立多体波浪能发电装置数值模型,浮体间采用铰接进行连接,并利用弹簧单元模拟发电液压缸的弹性阻尼作用。为极浅水多体波浪能发电装置设计合理的锚泊方案,采用时域动态耦合方法进行分析,同时考虑极浅水效应、多体影响和二阶低频力,根据API规范对自存工况下的锚泊缆强度进行校核,并对确定选用的锚泊方案进行敏感性分析。分析计算结果发现:在进行浅水多浮体锚泊设计时,低频波浪载荷、多体相互作用和海底摩擦不可忽视;对于极浅水的锚泊系统设计,Lazy wave型锚泊形式优于传统悬链线式锚泊。研究工作为近海极浅水海域新型海洋能发电装置锚泊系统的设计提供了参考和新思路。
[Abstract]:Three-dimensional potential flow theory is used to calculate the hydrodynamic characteristics of multi-body wave power generator in frequency domain. The effects of shallow water effect and multi-body interaction on hydrodynamic performance of single-body power generation unit are analyzed. The numerical model of multi-body wave energy generating device is established by using Orcaflex software. The floating body is connected by hinge and spring element is used to simulate the elastic damping effect of power generating hydraulic cylinder. In order to design a reasonable mooring scheme for multibody wave power generation in very shallow water, the time-domain dynamic coupling method is used to analyze the mooring scheme. The shallow water effect, multi-body effect and second-order low-frequency force are taken into account at the same time. According to the API code, the strength of anchor cable under self-storage condition is checked, and the sensitivity analysis is carried out to determine the selected anchoring scheme. The results of analysis and calculation show that the low frequency wave load, multi-body interaction and seabed friction can not be ignored in the design of shallow water multi-body mooring system, and that the design of, Lazy wave type mooring mode is superior to that of traditional catenary mooring mode for extremely shallow water mooring system. The research provides a reference and a new idea for the design of the mooring system of a new type of oceanic energy generating equipment in the offshore very shallow water area.
【作者单位】：北京数码易知科技发展有限责任公司;中国船级社海工技术中心;
【分类号】：P743.2

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