SUBSONIC FLUTTER OF PANELS ON CONTINUOUS ELASTIC FOUNDATIONS - EXPERIMENT AND THEORY
Abstract
The subsonic aeroelastic stability of a two-dimensional panel resting on a continuous elastic foundation was investigated experimentally and theoretically. Experimentally, tests were conducted on a 104 x 24 x 0.018 in. rectangular aluminum panel in a low-speed wind tunnel. Definite flutter of a travelling wave type was observed. Films and oscillograph records were taken. Theoretically, a finite panel, two mode, standing-wave analysis was shown to give essentially the same behavior as the infinite panel, travelling-wave analysis of Miles (Jnl. Aeron. Sci. Vol. 23, No. 8, 771-791, 1956) for this panel on an elastic foundation. Although a mild, divergence-type instability exists for these panels, the dominant instability was shown to be of a travelling wave, flutter type. The role of additional internal damping was investigated and found to have an interesting destabilizing effect between the divergence and flutter speeds. Comparison of experiment and theory showed good agreement in the prediction of the flutter speed and wavelength, but rather poor agreement in the wave speed and frequency at flutter. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1962
- Accession Number
- AD0278235
Entities
People
- Brian Perkin
- Earl Dowell
- John Dugundji
Organizations
- Massachusetts Institute of Technology