The dynamic response of a thin, flexible disk spinning in an enclosed air-filled chamber, beyond the onset of aeroelastic flutter, is investigated experimentally. The results describe the occurrence of new nonlinear dynamic phenomena in the post-flutter regime. A primary instability leads to the Hopf bifurcation of the flat equilibrium to a finite amplitude backward traveling wave. A secondary instability causes this traveling wave to jump to a large-amplitude frequency locked, traveling wave vibration. For a small range of rotation speeds, both types of traveling wave motions co-exist. The results underscore the interplay between structural and fluidic nonlinearities in controlling the dynamic response of the fluttering disk in the post-flutter regime.
A Note on the Post-Flutter Dynamics of a Rotating Disk
Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received by the ASME Applied Mechanics Division, October 7, 2001; final revision, February 6, 2002. Associate Editor: N. C. Perkins.
Raman, A., Hansen , M. H., and Mote, , C. D., Jr. (October 31, 2002). "A Note on the Post-Flutter Dynamics of a Rotating Disk." ASME. J. Appl. Mech. November 2002; 69(6): 864–866. https://doi.org/10.1115/1.1504097
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