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.
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November 2002
Brief Notes
A Note on the Post-Flutter Dynamics of a Rotating Disk
A. Raman,
A. Raman
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288
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M. H. Hansen,
M. H. Hansen
Wind Energy Department Risø National Laboratory, DK-4000 Roskilde, Denmark
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C. D. Mote,, Jr., Professor of Engineering and President,
C. D. Mote,, Jr., Professor of Engineering and President,
Glenn L. Martin Institute, University of Maryland, College Park, MD 20742
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A. Raman
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288
M. H. Hansen
Wind Energy Department Risø National Laboratory, DK-4000 Roskilde, Denmark
C. D. Mote,, Jr., Professor of Engineering and President,
Glenn L. Martin Institute, University of Maryland, College Park, MD 20742
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.
J. Appl. Mech. Nov 2002, 69(6): 864-866 (3 pages)
Published Online: October 31, 2002
Article history
Received:
October 7, 2001
Revised:
February 6, 2002
Online:
October 31, 2002
Citation
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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