The analysis of vibrationsinduced by variation section vortex in tension leg platform for a floating wind turbine
HF Wang1, Y H Fan1, L Yang2
1School of Natural Sciences and Humanities, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, 518055, China
2Shanghai Electric Group Company Limited, Shanghai, 200000, China
During the previous decade, several offshore wind-farms were constructed for offshore wind energy generation showed promise as a source of green energy. However, there are several challenges to be met in the design and construction of the foundations for offshore wind turbines. The fatigue load plays an important and crucial role in the design of the supporting structures. In this paper, the vortex-induced vibrations of the tension leg platform were studied. Two types of structures namely; cylindrical Tension Leg Platform (TLP) and variablecross-section TLP were designed and studies on them were conducted to compare the advantages and drawbacks resulting from vortex-induced vibrations. Both uniform and shear flow were considered to simulate water flow through the structures. The variable cross-section TLP, which possesses outstanding mechanical properties, gave lower vortex shedding frequency compared to the cylindrical TLP for the same velocity. This is the objective desired in vortex-induced vibration.