Structural Acoustics and Active Constrained Layer Damping of a Full Scale Fuselage Section: An Experimental Approach
Abstract
The mechanisms and underlying structural acoustics associated with the response of a full scale aircraft fuselage section are examined in its uncontrolled state and with the application of Active Constrained Layer Damping (ACLD) treatment to the structure. In these experiments, active structural acoustic control is demonstrated, where both the surface vibration and interior acoustic pressure are attenuated. The uncontrolled response is first studied experimentally under three different physical forcing functions by use of high spatially sampled surface velocity and interior pressure measurements over a band from 0–1000 Hz. These results indicate rich modal excitation of the fuselage and interior by a point force applied at a frame/stringer intersection of the structure. Real time active control experiments using simple surface minimization control laws are performed under this excitation, yielding good performance.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 15, 1998
- Source ID
- 10.1115/imece1998-0497
Entities
People
- Amr M. Baz
- Brian H. Houston
- Peter C. Herdic
Organizations
- United States Naval Research Laboratory
- University of Maryland