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Aeroelastic Stability of Wide Webs and Narrow Ribbons

[+] Author Affiliations
Rahul A. Bidkar, Arvind Raman, Anil K. Bajaj

Purdue University, West Lafayette, IN

Paper No. DETC2007-35169, pp. 2065-2073; 9 pages
doi:10.1115/DETC2007-35169
From:
  • ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C
  • Las Vegas, Nevada, USA, September 4–7, 2007
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4802-7 | eISBN: 0-7918-3806-4
  • Copyright © 2007 by ASME

abstract

Uni-axially tensioned wide webs and narrow ribbons commonly used in the paper-handling, textile, sheet-metal, and plastics industries are known to undergo large amplitude vibrations characterized as aeroelastic flutter. The aeroelastic stability of stationary wide webs and narrow ribbons coupled with fluid flow across the free edges of the web or ribbon is investigated in this article. The web or ribbon is modeled as a uni-axially tensioned Kirchhoff plate with vanishingly small bending stiffness. The 3D unsteady fluid flow surrounding the web or ribbon is evaluated numerically by using the vortex-lattice method. Wide webs are mainly found to exhibit the divergence instability. For some values of the applied tension, the clustered web modes exhibit frequency curve veering accompanied by a weak flutter instability before the occurrence of the divergence instability. The applied tension plays a critical role in deciding the type of instability in narrow ribbons. In cross flow, depending on the applied tension, narrow ribbons undergo flutter instability or divergence instability or the simultaneous onset of both instabilities.

Copyright © 2007 by ASME
Topics: Stability

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