Research on the influence of helical strakes on dynamic response of floating wind turbine platform

The stability of platform structure is the paramount guarantee of the safe operation of the offshore floating wind turbine. The NREL 5MW floating wind turbine is established based on the OC3-Hywind Spar Buoy platform with the supplement of helical strakes for the purpose to analyze the impact of helical strakes on the dynamic response of the floating wind turbine Spar platform. The dynamic response of floating wind turbine Spar platform under wind, wave and current loading from the impact of number, height and pitch ratio of the helical strakes is analysed by the radiation and diffraction theory, the finite element method and orthogonal design method. The result reveals that the helical strakes can effectively inhibit the dynamic response of the platform but enlarge the wave exciting force; the best parameter combination is two pieces of helical strakes with the height of 15%D (D is the diameter of the platform) and the pitch ratio of 5; the height of the helical strake and its pitch ratio have significant influence on pitch response.

[1]  Finn Gunnar Nielsen,et al.  Integrated Dynamic Analysis of Floating Offshore Wind Turbines , 2006 .

[2]  Jason Jonkman,et al.  Quantitative Comparison of the Responses of Three Floating Platforms , 2010 .

[3]  Jing Zhao,et al.  Motion performance and mooring system of a floating offshore wind turbine , 2012 .

[4]  Jun B. Rho,et al.  Heave And Pitch Motions of a Spar Platform With Damping Plate , 2002 .

[5]  Yang Chen-jun,et al.  REVIEW ON THE STUDY OF SPAR VORTEX-INDUCED MOTIONS KEY CHARACTERISTIC , 2008 .

[6]  Jason Jonkman,et al.  Engineering Challenges for Floating Offshore Wind Turbines , 2007 .

[7]  S. T. Slocum,et al.  Flow-Induced Vibration of a Long, Flexible, Straked Cylinder in Uniform and Linearly Sheared Currents , 2004 .

[8]  Sandy Butterfield,et al.  Feasibility of Floating Platform Systems for Wind Turbines: Preprint , 2004 .

[9]  Li Hong-xia.  Time domain analysis of heave motion for Truss Spar in random seas , 2012 .

[10]  Weui-Bong Jeong,et al.  Dynamic response of floating substructure of spar-type offshore wind turbine with catenary mooring cables , 2013 .

[11]  Allan Magee,et al.  Model Test Experience on Vortex Induced Vibrations of Truss Spars , 2003 .

[12]  Jason Jonkman,et al.  Loads Analysis of Several Offshore Floating Wind Turbine Concepts , 2011 .

[13]  Rehman M. Khan.  Design of Experiment , 2013 .

[14]  Jason Jonkman,et al.  Dynamics of offshore floating wind turbines—model development and verification , 2009 .

[15]  Moo-Hyun Kim,et al.  Mathieu instability of a spar platform with mooring and risers , 2004 .

[16]  Radboud van Dijk,et al.  The Effect of Mooring System and Sheared Currents on Vortex Induced Motions of Truss Spars , 2003 .

[17]  A. Pantaleo,et al.  Feasibility study of off-shore wind farms: an application to Puglia region , 2005 .

[18]  Jun B. Rho,et al.  An Experimental Study for Mooring Effects on the Stability of Spar Platform , 2003 .