漂浮摆式波浪能发电装置的频时域仿真分析

文章研究了3种不同外形(圆、椭圆和椭圆-圆)波浪能发电装置的纵摇运动,通过ANSYS AQWA对3种外形装置进行了频域仿真,对比了3种外形装置的辐射阻尼、附加质量和波浪激励力等水动力系数;再将频域分析中得到的水动力系数导入WEC-SIM,进行了时域仿真,对比了3种外形装置的摆角和瞬时功率。研究结果表明,尽管椭圆形装置的辐射阻尼、附加质量和波浪激励力矩等水动力系数最大,但椭圆-圆形装置的摆角和瞬时功率最大,说明了不对称结构更有利于波浪能量的吸收和转化。

Frequency and time domain simulation analysis of floating-pendulum-type wave energy converter

This paper investigated pitch movement of three wave energy converters(WECs) with different shapes. Frequency domain simulations of the aforementioned three WECs were conducted using the software ANSYS AQWA, and their hydrodynamic coefficients including the radiation damping, the added mass and the wave excitation force were compared. Subsequently, the obtained hydrodynamic coefficients were introduced into the software WEC-SIM and the time domain simulations were implemented, and the pitch angle as well as the instantaneous power output of the three WECs were comparatively studied. The results show that although the ellipseshape device possesses the largest radiation damping, added mass and wave excitation force, the ellipse-circle-shape device owns the highest pitch angle and instantaneous power output, which demonstrates that the asymmetry shape contributes to the absorption and conversion of the wave energy.