Active modal control of radiated noise of a submarine hull

摘要

A theoretical analysis of the active control of low frequency radiated pressure from submarine hulls is presented. Two typical models are examined in this paper. Each of the models is a water-loaded finite stiffened cylindrical shell with a hemispherical shell on one end and conical shell on the other end, which forms a simple model of a submarine hull. The conical end is excited by an axial force to simulate propeller excitations while the other end is free. The control action is implemented through a Tee-sectioned circumferential stiffener driven by pairs of PZT stack actuators. The actuators are located under the flange of the stiffener and are driven out of phase to produce a control moment. In general, it was found that the control system was capable of reducing 40% to 95% of the total radiated pressure from each of the submarine hulls for the first three axial modes.