Calibration and comparison of VIV wake oscillator models for low mass ratio structures.

Kurushina, Victoria; Pavlovskaia, Ekaterina; Postnikov, Andrey; Wiercigroch, Marian

Abstract

In this work, Vortex-Induced Vibration (VIV) of a rigid cylinder on elastic supports is reviewed and modelled. We consider a cylinder moving both cross-flow and in-line, subjected to fluid forces calculated as proposed in [1]. A suite of wake oscillator models is investigated with different types of nonlinear damping in the fluid equation, where sets of model coefficients are optimized for each variation of the nonlinear damping using the constrained nonlinear minimization. The calibration is based on the experimental data presented by Stappenbelt and Lalji [2]. The largest displacement amplitude is used as the main calibration criterion to determine empirical coefficients of the fluid equations. The frequency difference between the beginning of resonance evaluated from the base model [1] and the experimental data [2] is used as an additional coefficient for calibration. The developed models are cross-checked using four sources of published experimental data [3, 4, 5, 6]. This allows us to identify the most suitable wake oscillator models that are applicable for a wide variety of experimental data. The main outcome of this research is a library of calibrated models describing fluid-structure interactions at low mass ratio. Specifically, it was shown that the Rayleigh damping is the most suitable for cross-flow equations, whereas the Van der Pol damping is preferable for in-line equations for these low mass ratio cases.

Citation

KURUSHINA, V., PAVLOVSKAIA, E., POSTNIKOV, A. and WIERCIGROCH, M. 2018. Calibration and comparison of VIV wake oscillator models for low mass ratio structures. International journal of mechanical sciences [online], 142-143, pages 547-560. Available from: https://doi.org/10.1016/j.ijmecsci.2018.04.027

• Journal Article Type: Article
• Acceptance Date: Apr 16, 2018
• Online Publication Date: Apr 22, 2018
• Publication Date: Jul 31, 2018
• Deposit Date: Feb 13, 2024
• Publicly Available Date: Feb 29, 2024
• Journal: International journal of mechanical sciences
• Print ISSN: 0020-7403
• Electronic ISSN: 1879-2162
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 142-143
• Pages: 547-560
• DOI: https://doi.org/10.1016/j.ijmecsci.2018.04.027
• Keywords: Vibration; Fluid dynamics; Rigid structures
• Public URL: https://rgu-repository.worktribe.com/output/2166777