NDLI: Shear flow induced vibrations of long slender cylinders with a wake oscillator model

Content Provider	Springer Nature Link
Author	Ge, Fei Lu, Wei Wang, Lei Hong, You Shi
Copyright Year	2011
Abstract	A time domain model is presented to study the vibrations of long slender cylinders placed in shear flow. Long slender cylinders such as risers and tension legs are widely used in the field of ocean engineering. They are subjected to vortex-induced vibrations (VIV) when placed within a transverse incident flow. A three dimensional model coupled with wake oscillators is formulated to describe the response of the slender cylinder in cross-flow and in-line directions. The wake oscillators are distributed along the cylinder and the vortex-shedding frequency is derived from the local current velocity. A non-linear fluid force model is accounted for the coupled effect between cross-flow and in-line vibrations. The comparisons with the published experimental data show that the dynamic features of VIV of long slender cylinder placed in shear flow can be obtained by the proposed model, such as the spanwise average displacement, vibration frequency, dominant mode and the combination of standing and traveling waves. The simulation in a uniform flow is also conducted and the result is compared with the case of nonuniform flow. It is concluded that the flow shear characteristic has significantly changed the cylinder vibration behavior.
Starting Page	330
Ending Page	338
Page Count	9
File Format	PDF
ISSN	05677718
Journal	Acta Mechanica Sinica
Volume Number	27
Issue Number	3
e-ISSN	16143116
Language	English
Publisher	The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences
Publisher Date	2011-06-23
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vortex-induced vibration Vortex-induced wave Shear flow Wake oscillator Long slender cylinder Engineering Fluid Dynamics Computational Intelligence Theoretical and Applied Mechanics Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Computational Mechanics

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