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A Physics-Based Model for VIV Analysis

[+] Author Affiliations
Efstathios Konstantinidis

University of Western Macedonia, Kozani, Greece

Paper No. OMAE2017-62483, pp. V002T08A043; 10 pages
doi:10.1115/OMAE2017-62483
From:
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5764-9
  • Copyright © 2017 by ASME

abstract

A new hydrodynamic model is presented for analysis and prediction of the response of cylinders undergoing vortex-induced vibration transverse to a free stream. The model is based on the decomposition of the total force into reaction and excitation components respectively acting along the instantaneous relative velocity between the vibrating cylinder and the free stream, and normal to it. The reaction force is modeled via Morison’s equation to introduce fluid inertia due to added mass and fluid damping due to drag. It is verified that the resulting nonlinear model can reproduce the actual response when supplied with measured force coefficients. Model predictions with a set of constant fluid forcing parameters are found to be consistent with empirical formulas for the peak response as a function of the combined mass-damping.

Copyright © 2017 by ASME

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