Quasisteady theory for the hydrodynamic forces on a circular cylinder undergoing vortex-induced vibration

Autor:	Yoshiki Nishi, Kunihiro Hoshino, Shotaro Uto, Kentaroh Kokubun
Rok vydání:	2008
Předmět:	Physics Mechanical Engineering Flow (psychology) Boundary (topology) Ocean Engineering Tourbillon Wake Oceanography Vortex Physics::Fluid Dynamics Vibration Classical mechanics Mechanics of Materials Vortex-induced vibration Cylinder
Zdroj:	Journal of Marine Science and Technology. 14:285-295
ISSN:	1437-8213 0948-4280
DOI:	10.1007/s00773-008-0036-z
Popis:	Vortex-induced vibrations of a rigid circular cylinder were studied by constructing a theory based on a wake oscillator model under quasisteady approximations, thereby evaluating vortex-induced hydrodynamic forces acting on the cylinder. A lock-in limit line representing the boundary for the occurrence of frequency lock-in was also theoretically derived. Hydrodynamic forces in forced oscillation problems estimated by the theory were compared with measured ones. Although some discrepancies were found, particularly in cases with high-frequency oscillations, good agreement was achieved in most cases. Accordingly, we conclude that the present theory captures well real phenomena in the wake downstream of a cylinder subjected to a flow.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b74b4f3b6f4822056e671208865b4013 https://doi.org/10.1007/s00773-008-0036-z Zobrazit plný text záznamu Full text from SpringerLink