超浅水浮式波浪能发电装置弹性系泊系统及水动力性能的数值与模型试验研究
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摘要
超浅水环境下浮式波浪能发电装置系泊系统性能的优劣直接影响装置在极限海况下的生存性和工作海况下的波浪能俘获性。针对波能装置运动特点和岛屿周边海域经济性开发的需要,设计一套适合超浅水环境的自动对浪型多点弹性系泊系统,并在系泊线中加入非线弹性拉伸材料——高弹性索。首先以鹰式波浪能装置为系泊对象,给出混合高弹性索和聚酯纤维系泊系统2种设计方案,通过对比分析,发现高弹性索可有效降低锚泊线的最大张力和普通锚链的用量,减轻系泊系统重量。混合高弹性索系泊系统用于超浅水环境下的浮式波浪能装置更具优越性。在此基础上,对极限工况下混合高弹性索系泊鹰式和细长体波浪能装置水动力性能进行时域耦合和水池模型试验研究。研究表明混合高弹性索多点弹性系泊系统能满足一般浮式波浪能装置在浅水大漂移载荷等恶劣海况下对锚泊系统的要求。
The performance of mooring system directly affects the survival and wave energy capture of floating wave energy conversion(WEC)in ultra-shallow water under typhoon sea state. In order to design an effective and economical flex mooring system for floating WEC,the effects of the mooring parameters on the performance of the superflex mooring system and the polyester one were investigated according to the initial design plans given in advance. The optimal superflex mooring system was developed on the basis of the static analysis results combined with the coupled calculations in time domain. Then,model test are adopted to investigate the hydrodynamic performance of Sharp Eagle and slender WECs with flex mooring system in survival sea-state. It is observed that the present superflex design is reliable and effective.
The performance of mooring system directly affects the survival and wave energy capture of floating wave energy conversion(WEC)in ultra-shallow water under typhoon sea state. In order to design an effective and economical flex mooring system for floating WEC,the effects of the mooring parameters on the performance of the superflex mooring system and the polyester one were investigated according to the initial design plans given in advance. The optimal superflex mooring system was developed on the basis of the static analysis results combined with the coupled calculations in time domain. Then,model test are adopted to investigate the hydrodynamic performance of Sharp Eagle and slender WECs with flex mooring system in survival sea-state. It is observed that the present superflex design is reliable and effective.
引文
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[13]Retzler C.Measurements of the slow drift dynamics of a model pelamis wave energy converter[J].Renewable Energy,2006,31(2):257-269.
[2]Johanning L,Smith G H,Wolfram J.Measurements of static and dynamic mooring line damping and their importance for floating WEC devices[J].Ocean Engineering,2007,34(14-15):1918--1934.
[3]Harris,R E,Johanning L,Wolfram J.Mooring systems for wave energy converters:A review of design issues and choices[A].Proceedings of the International Conference on Marine Renewable Energy[C],Blyth,UK,2004.
[4]Sheng Sougwei,You Yage,Wang Kunlin,et al.Research and Development of Sharp Eagle Wave Energy Convertor[A].6th International Conference on Ocean Energy[C],Halifax,Canada,2014.
[5]盛松伟,张亚群,王坤林,等.鹰式装置“万山号”总体设计概述[J].船舶工程,2015,37(1):10-14.[5]Sheng Songwei,Zhang Yaqun,Wang Kunlin,et al.General design of the shape eagle device"Wanshan"[J].Ship Engineering,2015,37(1):10-14.
[6]Fitzgerald J,Bergdahl L.Including moorings in the assessment of a generic offshore wave energy converter:A frequency domain approach[J].Marine Structures,2008,21(1):23-46.
[7]郭小天,张亮.潮流发电装置弹性锚泊设计[J].应用科技,2013,40(3):6-9.[7]Guo Xiaotian,Zhang Liang.The elastic mooring design of tidal current generation power device[J].Applied Science and Technology,2013,40(3):6-9.
[8]Fonseca N,Pascoal R,Morais T,et al.Design of a mooring system with synthetic ropes for the FLOW wave energy converter[A].28th International Conference on Ocean,Offshore and Arctic Engineering[C],Hawaii,USA,2009.
[9]OCIMF.Prediction of Wind and Current Loads on VLCCs[S].2nd Edition,England:Oil Companies International Marine Forum,1994.
[10]Dai Yishan,Chen Xiaobo,Duan Wenyang.Computation of low-frequency loads by the middle-field formulation[A].20th International Workshop on Water Waves and Floating Bodies[C],Longyearbyen,Norway,2005.
[11]Chen Xiaobo.Hydrodynamics in offshore and naval applications[R].HydroStar Theory Background,2004.
[12]杨建民,肖龙飞,盛振邦.海洋工程水动力学试验研究[M].上海:上海交通大学出版社,2008.[12]Yang Jianmin,Xiao Longfei,Sheng Zhenbang.Experimental study on hydrodynamics of offshore engineering[M].Shanghai:Publishing House of Shanghai Jiao Tong University,2008.
[13]Retzler C.Measurements of the slow drift dynamics of a model pelamis wave energy converter[J].Renewable Energy,2006,31(2):257-269.