CUED Publications database

Active control of sound radiated by a submarine hull in bending vibration using inertial actuators

Caresta, M (2011) Active control of sound radiated by a submarine hull in bending vibration using inertial actuators. Noise and Vibration Worldwide, 42. pp. 12-17. ISSN 0957-4565

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Abstract

Submarines are efficient sources of low frequency radiated noise due to the vibrations induced by the rotation of the propeller in a non uniform wake. In this work the possibility of using inertial actuators to reduce the far field sound pressure is investigated. The submerged vessel is modelled as a cylindrical shell with two conical end caps. Complicating effects such as ring stiffeners, bulkheads and the fluid loading are taken into account. A harmonic radial force is transmitted from the propeller to the hull through the stern end cone and it is tonal at the blade passing frequency (rotational speed of the shaft multiplied by the number of blades). The actuators are attached at the inside of the prow end cone to form a circumferential array. Both Active Vibration Control (AVC) and Active Structural Acoustic Control (ASAC) are analysed and it is shown that the inertial actuators can significantly reduce the far field sound pressure.

Item Type: Article
Uncontrolled Keywords: active control ASAC AVC bending inertial actuator submarine
Subjects: UNSPECIFIED
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:31
Last Modified: 28 Nov 2014 19:05
DOI: 10.1260/0957-4565.42.7.12