Buoy motion and power response for multi-section floating-type wave energy converter

  • GAO Hong-tao* ,
  • LI Biao
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  • Marine Engineering College,Dalian Maritime University, Dalian 116026,China)

Received date: 2015-12-10

  Revised date: 2015-12-22

  Online published: 2016-03-11

Abstract

Taking the multi-section floating-type wave energy converter (WEC) as the study object, the three-degree-of-freedom nonlinear coupled equations of the pitching-surging-heaving motions for the cylindrical wave capture buoy were formulated based on the linear wave theory and wave-body coupled interaction by using rigid body kinematics. Then the pitching motion characteristics and power responses were analyzed by means of frequency-domain in the China Yellow Sea and Bohai Sea. Results show that the main factors which affect the pitching motion are the natural vibration frequency and the length of buoy. The length of buoy, hydraulic damper and spring stiffness coefficient can not affect the resonant frequencies, but the influences of radius and draft are obvious. All above those factors contribute to complex changes of the power responses. The adjustments of suitable radius, draft and spring stiffness coefficient are the effective ways to improve the transfer power and adaptability to China offshore sea area.

Cite this article

GAO Hong-tao* , LI Biao . Buoy motion and power response for multi-section floating-type wave energy converter[J]. Journal of Dalian Maritime University, 2016 , 42(1) : 45 -50 . DOI: 10.16411/j.cnki.issn1006-7736.2016.01.009

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