Test-Bed Design and Modeling for Aircraft Interior Acoustic Control
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 methods 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1997
- Accession Number
- AD1004465
Entities
People
- Donald Q. O'sullivan
- K. Lilienkamp
- Michael L. Fripp
- N. W. Hagood
- S. R. Hall
Organizations
- Massachusetts Institute of Technology