The aeroelastic stability of a thin, flexible disk rotating in an enclosed compressible fluid is investigated analytically through a discretization of the field equations of a rotating Kirchhoff plate coupled to the acoustic oscillations of the surrounding fluid. The discretization procedure exploits Green’s theorem and exposes two different gyroscopic effects underpinning the coupled system dynamics: one describes the gyroscopic coupling between the disk and acoustic oscillations, and another arises from the disk rotation. The discretized dynamical system is cast in the compact form of a classical gyroscopic system and acoustic and disk mode coupling rules are derived. Effects of eigenvalue veering of structure and acoustic dominated modes are investigated in detail. For the undamped system, coupled structure-acoustic traveling waves can destabilize through mode coalescence leading to flutter instability. Regions in parameter space are identified where structure-acoustic traveling waves of specific wave numbers destabilize. The results are expected to be relevant for the design of high speed, low vibration, low noise hard disk drives and optical data storage systems.
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ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 2–6, 2003
Chicago, Illinois, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-3703-3
PROCEEDINGS PAPER
Aeroelastic Flutter of a Flexible Disk Rotating in an Enclosed Compressible Fluid
Namcheol Kang,
Namcheol Kang
Purdue University, West Lafayette, IN
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Arvind Raman
Arvind Raman
Purdue University, West Lafayette, IN
Search for other works by this author on:
Namcheol Kang
Purdue University, West Lafayette, IN
Arvind Raman
Purdue University, West Lafayette, IN
Paper No:
DETC2003/VIB-48421, pp. 989-998; 10 pages
Published Online:
June 23, 2008
Citation
Kang, N, & Raman, A. "Aeroelastic Flutter of a Flexible Disk Rotating in an Enclosed Compressible Fluid." Proceedings of the ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Chicago, Illinois, USA. September 2–6, 2003. pp. 989-998. ASME. https://doi.org/10.1115/DETC2003/VIB-48421
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