含惯性摆发电装置之浮标的水动力分析
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摘要
文章利用拉格朗日方程推导了含惯性摆波能发电装置之浮标在规则波作用下的七自由度运动方程。为了验证所推导公式的正确性,制作了一个物理模型,并对无负载阻尼工况在水槽中进行了模型试验。借助商业软件AQWA-LINE计算浮标的附加质量、辐射阻尼系数及波浪扰动力。利用文中推导的方程,计算了浮标及摆锤的运动响应,并将理论计算得到的结果与实验结果进行了比较。最后,分析了负载阻尼系数对浮标纵摇运动、摆锤纵摇运动、摆锤相对纵摇运动及波能转换效率的影响。
Seven differential equations of motions which are used to describe the behavior of a buoy with inertial pendulum wave energy extractor in regular waves are derived by application of Lagrange equations.To verify the validity of the theoretical formulas derived, a physical model was developed, and the model tests for the case in the absence of power take-off damping in regular waves were conducted in a wave flume. The added mass, radiation damping and the wave exciting forces on the buoy are obtained by commercial software AQWA-LINE. Based on the derived equations, the motion responses of the buoy and the inertial pendulum are calculated, and the theoretical results are compared with the experimental results. The influence of the power take-off damping on the pitch motions of the buoy and pendulum, relative pendulum oscillation as well as the wave energy conversion efficiency is discussed.
Seven differential equations of motions which are used to describe the behavior of a buoy with inertial pendulum wave energy extractor in regular waves are derived by application of Lagrange equations.To verify the validity of the theoretical formulas derived, a physical model was developed, and the model tests for the case in the absence of power take-off damping in regular waves were conducted in a wave flume. The added mass, radiation damping and the wave exciting forces on the buoy are obtained by commercial software AQWA-LINE. Based on the derived equations, the motion responses of the buoy and the inertial pendulum are calculated, and the theoretical results are compared with the experimental results. The influence of the power take-off damping on the pitch motions of the buoy and pendulum, relative pendulum oscillation as well as the wave energy conversion efficiency is discussed.
引文
[1]郁新新.智能一体太阳能LED航标灯的设计与实现[J].中国照明电器,2016(5):25-27.Yu Xinxin.Design of an intelligent integrated solar LED navigation light[J].China Light&Lighting,2016(5):25-27.
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[9]ANSYS.AQWA-LINE Manual[K].ANSYS Inc.United Kingdom,2010.
[10]Bar-Avi P,Benaroya H.Nonlinear dynamics of an articulated tower in the ocean[J].Journal of Sound and Vibration,1996,190(1):77-103.
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[12]王冬姣,邱守强,叶家玮.梯形摆式波能转换装置水动力性能研究[J].太阳能学报,2014,35(4):589-593.Wang Dongjiao,Qiu Shouqiang,Ye Jiawei.Hydrodynamic performance of trapezoidal pendulum wave energy converter[J].Acta Energiae Solaris Sinica,2014,35(4):589-593.
[2]Falcao A F de O.Wave energy utilization:A review of the technologies[J].Renewable and Sustainable Energy Reviews,2010,14:899-918.
[3]Masuda Y.An experience with wave power generation through tests and improvement[C]//IUTAM Sym.Hydrodynamics of Ocean-Wave Energy Utilisation.Lisbon,Springer-Verlag,Berlin,1985.
[4]Kofoed J P,Frigaard P,Friis-Madsen E,S覬ensen H C.Prototype testing of the wave energy converter wave dragon[J].Renewable Energy,2006,31:181-189.
[5]Waters R,Stalberg M,Danielsson O,Svensson O,Gustafsson S,Stromstedt E,et al.Experimental results from sea trials of an offshore wave energy system[J].Applied Physics Letters,2007,90(3)[Art No.034105]:1-3.
[6]Falnes J.Wave-energy conversion through relative motion between two single-mode oscillating bodies[J].Journal of Offshore Mechanics and Arctic Engineering,1999,121(1):32-38.
[7]Eidsmoen H.Hydrodynamic parameters for a two-body axisymmetric system[J].Applied Ocean Research,1995,17(2):103-115.
[8]Korde U A.Systems of reactively loaded coupled oscillating bodies in wave energy conversion[J].Applied Ocean Research,2003,25:79-91.
[9]ANSYS.AQWA-LINE Manual[K].ANSYS Inc.United Kingdom,2010.
[10]Bar-Avi P,Benaroya H.Nonlinear dynamics of an articulated tower in the ocean[J].Journal of Sound and Vibration,1996,190(1):77-103.
[11]Ryu S,Duggal A S,Heyl C N,et al.Prediction of deepwater oil offloading buoy response and experimental validation[J].International Journal of Offshore and Polar Engineering,2006,16(4):290-296.
[12]王冬姣,邱守强,叶家玮.梯形摆式波能转换装置水动力性能研究[J].太阳能学报,2014,35(4):589-593.Wang Dongjiao,Qiu Shouqiang,Ye Jiawei.Hydrodynamic performance of trapezoidal pendulum wave energy converter[J].Acta Energiae Solaris Sinica,2014,35(4):589-593.
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