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

doi:10.1016/S0889-9746(02)00137-8

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

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	479-483
Number of pages	5
Journal	Journal of Fluids and Structures
Volume	17
Issue number	3
DOIs	https://doi.org/10.1016/S0889-9746(02)00137-8
State	Published - Mar 2003

ASJC Scopus subject areas

Mechanical Engineering

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10.1016/S0889-9746(02)00137-8

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title = "A note on the fluid damping of an elastic cylinder in a cross-flow",

abstract = "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.",

author = "Zhang, {H. J.} and Y. Zhou and So, {R. M C} and Marc Mignolet and Wang, {Z. J.}",

note = "Funding Information: Y.Z. and R.M.C.S. wishes to acknowledge support given to them by the Central Research Grant of The Hong Kong Polytechnic University under Grant No. G-V529, and the Research Grants Council of the Government of the Hong Kong Special Administrative Region under Grant Nos. PolyU5161/97E and PolyU5128/98E. Authors would also like to give special thanks to Prof. D.S. Weaver for his valuable comments and detailed suggestions.",

year = "2003",

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doi = "10.1016/S0889-9746(02)00137-8",

language = "English (US)",

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T1 - A note on the fluid damping of an elastic cylinder in a cross-flow

AU - Zhang, H. J.

AU - Zhou, Y.

AU - So, R. M C

AU - Mignolet, Marc

AU - Wang, Z. J.

N1 - Funding Information: Y.Z. and R.M.C.S. wishes to acknowledge support given to them by the Central Research Grant of The Hong Kong Polytechnic University under Grant No. G-V529, and the Research Grants Council of the Government of the Hong Kong Special Administrative Region under Grant Nos. PolyU5161/97E and PolyU5128/98E. Authors would also like to give special thanks to Prof. D.S. Weaver for his valuable comments and detailed suggestions.

PY - 2003/3

Y1 - 2003/3

N2 - 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.

AB - 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.

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JO - Journal of Fluids and Structures

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ER -

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

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