Basic Study on Active Vibration Control Methods of Axisymmetric Elastic Beam Subjected to the Annular Flow

概要

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Flow-induced vibration occurs in the structures subjected to annular flow such as elastic beam in the narrow passage. Once the vibration occurs, the vibration becomes larger. In this paper, active vibration control of the axisymmetric elastic beam subjected to annular flow is investigated. Fluid-structure coupled equations based on the Euler-Bernoulli type partial differential equation and Navier-Stokes equation are derived including control terms. In this paper, two kinds of control methods using piezoelectric actuator and air pressured actuator are proposed. Applying the optimal control law to the coupled system, the unstable behavior is stabilized. Simulation studies are performed to investigate the efficiency of the proposed control methods and the effects of the actuator position on control performance.