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.
Testbed design and modeling for aircraft interior acoustic control
Smart Structures and Materials 1997: Smart Structures and Integrated Systems ; 1997 ; San Diego,CA,USA
Proc. SPIE ; 3041
1997-06-06
Conference paper
Electronic Resource
English