Development of an Analytical Model and Code for the Flapping Response of a Hawte Rotor Blade

摘要

The following report is a descriptive summary of the work performed under RFP 76824 for Rockwell International's Rocky Flats, Colorado, facility as part of the Federal Wind Energy Research Program. The objectives of this project were threefold: (1) development of an analytical model of the flapping response of a wind turbine rotor; (2) development of an interactive, user-friendly computer code for performing the flapping analysis and for computing the rotor loads due to aerodynamic factors and blade flapping responses; and (3) verification of the model and the computer code with measured loads data taken from an existing machine. The model is a single-degree-of-freedom flapping response model of an individual wind turbine blade. It accounts for the blade bending deformation about the smallest blade inertia axis. The rotor is assumed to rotate at a constant speed, but the hub is allowed to move in a prescribed yawing motion. Rotors that are tilted and yawed relative to the mean wind direction can be accommodated in a straightforward manner. (ERA citation 10:030633)