A magnetostrictive active vibration control approach for rotating functionally graded carbon nanotube-reinforced sandwich composite beam

摘要

Vibration of a rotating functionally graded carbon nanotube-reinforced sandwich composite beam was controlled using two magnetostrictive actuator layers. A closed-loop velocity proportional feedback control approach was employed to mitigate the vibration amplitude. The Timoshenko beam theory (TBT) as well as the Hamilton's principle were used to derive the equations of motion. The differential quadrature method was implemented to solve the governing equations. Some convergence and comparison studies were performed to assess the stability and accuracy of results. The effects of distribution type and volume fraction of the carbon nanotubes (CNTs) and angular velocity on vibration suppression of different modes of the sandwich beam were investigated. Overshoot response of the rotating sandwich beam was significantly affected by the volume fraction and distribution type of CNTs.