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A Note on the Fluid Damping of an Elastic Cylinder in a Cross-flow by H.J Zhang; Y Zhou; R.M.C So; M.P Mignolet; Z.J Wang is a Engineering article available to read on EtoBox.

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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 U r 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 U r 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.

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Author

H.J Zhang; Y Zhou; R.M.C So; M.P Mignolet; Z.J Wang

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0889-9746)

Published

2003

Language

EN

Field

Engineering (Physical Sciences)