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ホーム アーカイブ 役員 今後の会合 American Society of Thermal and Fluids Engineering

EXPERIMENTAL PARAMETERS IDENTIFICATION OF A FLEXIBLE CYLINDER UNDERGOING VORTEX-INDUCED VIBRATIONS

Cintia Monreal-Jimenez
Universidad Autonoma de San Luis Potosi, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290, San Luis Potosi, Mexico

Francisco Oviedo-Tolentino
Universidad Autonoma de San Luis Potosi, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290, San Luis Potosi, Mexico

Geydy Luz Gutierrez-Urueta
Universidad Autonoma de San Luis Potosi, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290, San Luis Potosi, Mexico

Ricardo Romero-Mendez
Universidad Autonoma de San Luis Potosi, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290, San Luis Potosi, Mexico

Robert Jackel
Universidad Autonoma de San Luis Potosi, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290, San Luis Potosi, Mexico

DOI: 10.1615/TFEC2018.fli.024484
pages 915-922


キーワード: vortex-induced vibrations, VIV, lock-in, added mass, phase angle, equivalent parameters

要約

Despite several investigations on vortex-induced vibrations (VIV), fundamental questions related to parameters used in the cylinder dynamics equation model, still exist. In this work, a method to identify the mass, spring and damper coefficients (so-called equivalent parameters) is proposed. An experimental apparatus was built to study free oscillations of a flexible circular cylinder in steady current along the entire lock-in region (Re from 97 to 320). Experimental results suggest that equivalent parameters can explain in a better way the behavior of the cylinder. Frequency of the cylinder is in agreement with the value of the added mass. Maximum amplitude and hydrodynamic response are related with the total and the vortex phase angle, respectively. Discrepancies were found comparing actual and literature results.

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