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Numerical analysis of freestream turbulence effects on the vortex-induced vibrations of a rectangular cylinder
https://orcid.org/0000-0002-8119-7532
Abstract Large-Eddy Simulation of the flow around an elastically mounted rectangular cylinder with an aspect ratio 4 was undertaken. 1DOF analysis of the heaving and torsional motions was performed under a free vibration. Various characteristics of the flow-field at lock-in are discussed. Subsequently, a divergence-free synthetic inflow generation approach was employed to analyse the effects of the freestream turbulence on the bridge response. The inflow turbulence intensity and integral length scales were systematically studied. The effect of turbulence intensity (up to 12%) was shown to deplete the structural response for both torsional and heaving motions. A variation of the tested integral length scales, which were order of the cylinder dimensions, had less effects (than a variation of the turbulence intensity) on the structure response.
Highlights A high fidelity analysis including LES for free vibrations of a rectangular cylinder. An increase of turbulence intensity significantly diminishes the oscillation of structure. An increase of turbulence integral length scales moderately enhances the oscillation of structure. An increase of integral length scales enhances the spanwise correlation of surface pressure.
Numerical analysis of freestream turbulence effects on the vortex-induced vibrations of a rectangular cylinder
https://orcid.org/0000-0002-8119-7532
Abstract Large-Eddy Simulation of the flow around an elastically mounted rectangular cylinder with an aspect ratio 4 was undertaken. 1DOF analysis of the heaving and torsional motions was performed under a free vibration. Various characteristics of the flow-field at lock-in are discussed. Subsequently, a divergence-free synthetic inflow generation approach was employed to analyse the effects of the freestream turbulence on the bridge response. The inflow turbulence intensity and integral length scales were systematically studied. The effect of turbulence intensity (up to 12%) was shown to deplete the structural response for both torsional and heaving motions. A variation of the tested integral length scales, which were order of the cylinder dimensions, had less effects (than a variation of the turbulence intensity) on the structure response.
Highlights A high fidelity analysis including LES for free vibrations of a rectangular cylinder. An increase of turbulence intensity significantly diminishes the oscillation of structure. An increase of turbulence integral length scales moderately enhances the oscillation of structure. An increase of integral length scales enhances the spanwise correlation of surface pressure.
Numerical analysis of freestream turbulence effects on the vortex-induced vibrations of a rectangular cylinder
https://orcid.org/0000-0002-8119-7532
Abstract Large-Eddy Simulation of the flow around an elastically mounted rectangular cylinder with an aspect ratio 4 was undertaken. 1DOF analysis of the heaving and torsional motions was performed under a free vibration. Various characteristics of the flow-field at lock-in are discussed. Subsequently, a divergence-free synthetic inflow generation approach was employed to analyse the effects of the freestream turbulence on the bridge response. The inflow turbulence intensity and integral length scales were systematically studied. The effect of turbulence intensity (up to 12%) was shown to deplete the structural response for both torsional and heaving motions. A variation of the tested integral length scales, which were order of the cylinder dimensions, had less effects (than a variation of the turbulence intensity) on the structure response.
Highlights A high fidelity analysis including LES for free vibrations of a rectangular cylinder. An increase of turbulence intensity significantly diminishes the oscillation of structure. An increase of turbulence integral length scales moderately enhances the oscillation of structure. An increase of integral length scales enhances the spanwise correlation of surface pressure.
Numerical analysis of freestream turbulence effects on the vortex-induced vibrations of a rectangular cylinder
Daniels, Steven J. (author) / Castro, Ian P. (author) / Xie, Zheng-Tong (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 153 ; 13-25
2016-03-14
13 pages
Article (Journal)
Electronic Resource
English
Effects of freestream turbulence on streamwise pressure measured on a square-section cylinder
| Online Contents | 1999