Hydrodynamic Performance of Multiple Degrees of Freedom Wave Energy Converter with Vertical Axis of Symmetry [多自由度轴对称型波能转换装置水动力性能研究]

作者：Wang D.; Liu K.; Qiu S.

来源：Ship Building of China, 2021, 62(2): 119-131.

• Heave
• Multiple degrees of freedom
• Pitch
• Wave energy converter

A new type of multiple degrees of freedom wave energy converter is proposed, which consists of a floating buoy with vertical axis of symmetry and an articulated power take-off (PTO) pipe. Vertical power taking-off mechanisms are installed in the PTO pipe, and the floating buoy can slide along the PTO pipe under the action of water waves. Based on linear potential theory, a hydrodynamic model of the wave energy converter is established, which is able to generate power in multiple degrees of freedom, and can be simplified into three equations of single degree of freedom for heave, pitch and roll relative to hinge joint of the buoy and PTO pipe. In order to verify the correctness of the model, the frequency-domain results for each degree of freedom are compared with those based on AQWA-NAUT. Compared with the heave point absorption device, the new type of wave energy converter is able to capture energy of the floating buoy in multiple degrees of freedom, so as to improve wave energy capture efficiency and energy capture bandwidth.

• 单位
  华南理工大学