主催: 一般社団法人 日本機械学会
会議名: Dynamics and Design Conference 2021
開催日: 2021/09/13 - 2021/09/17
In recent years, offshore wind energy has been attracting much attention as a renewable energy source, and various studies have been conducted around the world to achieve the practical use of offshore wind power converters. Among the various offshore wind power generation devices proposed so far, a floating body type is more suitable for the Japanese waters where the water depths are 50 m or more and easier to install than the other strategies, even though wave-induced vibration is a significant issue. On the other hand, a wave energy converter (WEC) with an inerter mechanism consisting of a rotational mass was proposed by the authors to enhance the power generation performance. This study proposes a floating wind turbine with the inerter-integrated WEC to generate electricity from the wave-induced vibration of the floating body and reduce the oscillation of the wind turbine simultaneously. First, a more reliable analytical model for the proposed device is developed considering the effects of additional mass, radiation damping, and wave excitation force on the floating body. Then, the effectiveness of the proposed mechanism is shown through numerical simulation studies to irregular waves generated by the JONSWAP spectrum using the derived model. The parameter for the damping by the motor is investigated to optimize the power generation efficiency and the structural control performance as well.
