Dynamic Response of Wind Turbine Rotor Systems

The basic response characteristics of wind turbine rotor blades are developed using elementary analytical techniques. The uncoupled flapping response to the vertical gradient of wind, crosswind, rotor shaft yaw precession, and gravity forces; and the uncoupled lead-lag response to gravity forces are treated. The influence of blade number and hub articulation on blade loads and tower loads is examined and basic scaling relationships are discussed.