0
RESEARCH PAPERS

Nonlinear Fluid-Structure Interaction in Propeller Aircraft Cabins

[+] Author and Article Information
M. Alvelid

Division of Solid Mechanics, Chalmers University of Technology, S-412 96 Göteborg, Sweden

J. Vib. Acoust 119(3), 363-373 (Jul 01, 1997) (11 pages) doi:10.1115/1.2889732 History: Received August 01, 1993; Online February 26, 2008

Abstract

A procedure for studying the acoustic superharmonic response in propeller aircraft cabins subject to stationary single frequency load excitation is proposed. The harmonic balance method is used to solve the nonlinear fluid-structure interaction multi-degree-of-freedom problem at hand. In the problem studied, the structure is nonlinear while the fluid remains linear. In the solution method proposed, generalised coordinates of the assumed series expansion for the displacements are used as unknowns. Two examples, simulating an aircraft structure with a fluid cavity, are examined. The present calculations show that in a lightly damped one-dimensional system with cubic stiffness, the noise levels from the superharmonic resonance may be slightly lower than those resulting from the fundamental frequency. For a typical model of a cross-section of an aircraft cabin, it is shown that nonlinear damping in spacing material will result in a considerable influence of the response in the third tone. For the one-dimensional system, good agreement is obtained with results from parallel nonlinear analyses where the discretized system of inertia equations is solved employing explicit time integration. For the multi-degree-of-freedom system modelling the aircraft cabin, a comparison of results between the harmonic balance method and the explicit time integration of a corresponding FE model indicated a partial agreement of the two. However, several different solutions may exist to a nonlinear equation, which make the comparison uncertain.

Copyright © 1997 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In