Vortex-induced vibration forever even with high structural damping

Peng Han, Emmanuel De Langre, Mark C. Thompson, Kerry Hourigan, Jisheng Zhao

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

This study investigates the effect of structural damping on vortex-induced vibration (VIV) of a circular cylinder when the mass ratio is below its critical value. It is confirmed by water-channel experiments and a reduced-order model (ROM) that the previously identified phenomenon of VIV forever, i.e. resonance oscillations at any reduced velocity, persists even with high structural damping. Of interest, the ROM results reveal that the wake mode for VIV forever is unstable with a constant positive growth rate with increasing reduced velocity, while the experimental results suggest that VIV forever is associated with a synchronisation between the non-stationary cylinder vibration frequency and the vortex-shedding frequency.

Original languageEnglish
Article numberA13
Number of pages16
JournalJournal of Fluid Mechanics
Volume962
DOIs
Publication statusPublished - 10 May 2023

Keywords

  • flow-structure interactions
  • vortex instability
  • vortex shedding

Cite this