A note on the fluid damping of an elastic cylinder in a cross-flow

H. J. Zhang, Y. Zhou, R. M C So, Marc Mignolet, Z. J. Wang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


This note reports an experimental study of the fluid damping of a long slender cylinder, fixed at both ends (no rotation and displacement), in a cross air-flow. The structural dynamic strain was measured in the lift direction over a range of reduced velocity Ur using a fibre-optic Bragg grating sensor. An auto-regressive moving average technique was used to deduce the effective damping ratios (including structural and fluid damping) from the strain data. The modal damping ratios corresponding to the first-, second- and third-mode vibrations over a range of Ur from 3 to 45 have been characterized and discussed. The results show that the value of fluid damping varied significantly at resonance when the vortex-shedding frequency coincides with one of the natural frequencies of the combined fluid-structure system.

Original languageEnglish (US)
Pages (from-to)479-483
Number of pages5
JournalJournal of Fluids and Structures
Issue number3
StatePublished - Mar 2003

ASJC Scopus subject areas

  • Mechanical Engineering


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