The Numerical Research of Two-Degrees-of-Freedom Vortex-Induced Vibrations of Circular Cylinders

Jie Li Fan; Wei Ping Huang

doi:10.4028/www.scientific.net/AMM.204-208.4598

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 204-208The Numerical Research of Two-Degrees-of-Freedom...

The Numerical Research of Two-Degrees-of-Freedom Vortex-Induced Vibrations of Circular Cylinders

Abstract:

The two-degrees-of-freedom of vortex-induced vibration of circular cylinders is numerically simulated with the software ANSYS/CFX. The VIV characteristic, in the two different conditions (A/D=0.07 and A/D=1.0), is analyzed. When A/D is around 0.07, the amplitude ratio of the cylinder’s VIV between in-line and cross-flow direction in the lock-in is lower than that in the lock-out. The in-line frequency is twice of that in cross-flow direction in the lock-out, but in the lock-in, it is the same as that in cross-flow direction and the same as that of lift force. When A/D is around 1.0, the amplitude ratio of the VIV between in-line and cross-flow in the lock-in is obviously larger than that in the lock-out. Both in the lock-in and in the lock-out, the in-line frequency is twice of that in cross-flow direction.

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Periodical:

Applied Mechanics and Materials (Volumes 204-208)

Pages:

4598-4601

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.204-208.4598

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Online since:

October 2012

Authors:

Jie Li Fan, Wei Ping Huang

Keywords:

Computational Fluid Dynamics (CFD), Cross-Flow VIV, In-Line VIV, Vortex-Induced Vibration (VIV)

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