Dynamic modeling and vibration analysis of rotating beams with active constrained layer damping treatment in temperature field

A new rigid-flexible coupled dynamic model considering temperature variation is developed for rotating beams with active constrained layer damping (ACLD) treatment in closed-loop and open-loop cases. By solving the corresponding linearized vibration equations of the smart system, the thermal vibration characteristics of the system in the two cases are analyzed. Influences of parameters, such as the angular velocity, the temperature, the gains of PD control, on the modal frequencies and damping ratios of the smart beam are discussed. Simulation results show that the variation of temperature can strongly affect the modal frequencies and damping performance of the ACLD beam, and there are critical temperatures that can change the damping performance of the ACLD beam in both open-loop and closed-loop cases. Research in this paper will be helpful for the dynamics of high speed rotating blades operating under thermal environment.