Numerical analysis for active control of coupled vibration of fluid-filled elastic cylindrical shell

This paper presents a numerical analysis study on active control of the fluid-structure coupled vibration of an infinite fluid-filled elastic cylindrical shell. Two types of propagating waves, i.e. breathing mode and beam mode, are considered as the disturbances. The radial force acting on the shell is used as the control input, and the radial displacements downstream of the control input are chosen as the error signals. Three control strategies are employed, i.e., a control force input with a error sensors, a control force with two error sensors, and two control force inputs with two error sensors. Total transmission energy loss is used to evaluate the control effect. The effects of the distances between two control forces and two error sensors on active control are examined through numerical results, and corresponding control mechanisms are analyzed.