Vibration and Noise Control of the Fuselage via Dynamic Absorbers

[+] Author and Article Information
Y. M. Huang

Department of Mechanical Engineering, National Central University, Chung-Li, Taiwan, 320 Republic of China

C. R. Fuller

Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061-0238

J. Vib. Acoust 120(2), 496-502 (Apr 01, 1998) (7 pages) doi:10.1115/1.2893857 History: Received October 01, 1995; Revised September 01, 1996; Online February 26, 2008


A closed, elastic cylindrical shell is used as a simple model of the aircraft’s fuselage. For reducing the vibration of the fuselage and the subsequent interior sound pressure due to the propellers, several dynamic absorbers are attached to the shell. In the paper, we analytically derive the vibration and the interior sound pressure of the shell by employing the techniques of subsystem synthesis and modal expansion where the external distributed pressures are chosen according to experimental data of an actual aircraft. The absorbers are successful for attenuating the vibration and the noise. The effects of altering various parameters of the shell, the external pressures, and the absorbers, are also studied and discussed. Finally, some general guidelines of absorber design for vibration and noise control of the fuselage are presented.

Copyright © 1998 by The American Society of Mechanical Engineers
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