Testbed design and modeling for aircraft interior acoustic control

Michael L. R. Fripp; Donald Q. O'Sullivan; Steven R. Hall; Nesbitt W. Hagood; K. Lilienkamp

doi:10.1117/12.275718

6 June 1997 Testbed design and modeling for aircraft interior acoustic control

Michael L. R. Fripp, Donald Q. O'Sullivan, Steven R. Hall, Nesbitt W. Hagood, K. Lilienkamp

Proceedings Volume 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems; (1997) https://doi.org/10.1117/12.275718
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

A cylindrical test-bed has been designed and modeled to aid in the study and control of interior acoustics in aircraft. The test-bed accounts for local as well as global structural- acoustic dynamics encountered in typical aircraft. The design is based on several existing aircraft and models used to study aircraft dynamics. The test-bed incorporates the basic geometry and materials common to a majority of aircraft, including an aluminum skin shrouding a framed structure composed of ribs and stringers. The design is approximately a one-third scale representation with a cylindrical geometry measuring 0.91 m diameter and 1.98 m long. The test-bed has been modeled using finite element method and Rayleigh-Ritz assumed modes analysis. The models were used to refine the design of the test-bed as well as to model the coupled structural-acoustic dynamics. The models predict that the test-bed will have a modal structure commensurate with experimental identifications on existing aircraft.

Citation Download Citation

Michael L. R. Fripp, Donald Q. O'Sullivan, Steven R. Hall, Nesbitt W. Hagood, and K. Lilienkamp "Testbed design and modeling for aircraft interior acoustic control", Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); https://doi.org/10.1117/12.275718

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