Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 19, 2024 - November 20, 2024
An aeroelastic analysis system for a vertical-axis butterfly wind turbine (rotor diameter: 14 m) is under development using MATLAB Simulink/Simscape. A method is proposed to extract the forces and moments acting at any part of a multibody model for structural analysis using a weld joint block. The behaviors of the rotor rotational speed and the movable arm tilt angle in a constant or turbulent wind, as well as the axial force and moment acting on the joint part between the hub and a slant blade, were analyzed for a model incorporating a suspended movable arm type over-speed control system. In a constant wind of 7 m/s, the three movable arms tilted almost simultaneously, however in a turbulent wind, only one movable arm tilted. The average values of the span-wise force and bending moment at the joint part between the upper slant blade and the hub were almost equal in constant and turbulent flows, however the fluctuation amplitude depends on the rotor rotational speed.
