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A new modeling approach for transversely oscillating square-section cylinders
- Source :
- Journal of Fluids and Structures. 81:492-513
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- This paper proposes a new generalized semi-empirical model to simulate fluid–structure interaction forces experienced by a transversely oscillating square-section cylinder by a more comprehensive approach. The total fluctuating transverse aerodynamic forces determined by this new modeling approach are composed of three main unsteady excitation modules. The first component relates to the conventional fluid inertia effect; the second component represents the varying incidence angle effect, including the wavelength-changing effect of downstream wake undulation by introducing a circulation lag function; and the last one denotes the excitation effect due to the strong resonant interaction between wake undulation and Karman vortex shedding. In addition, the new model establishment process follows the “simple-to-use” principle, so it can be applicable even when few experimental data are available. Good agreements are observed between the predictions by this model and unsteady force coefficient results taken from harmonically forced vibration experiments. Moreover, the new model developed in this study can not only simulate the interaction effects between the vortex-induced vibration (VIV) and galloping, but also retain the predictive capability for the cases of pure vortex resonance and pure galloping phenomena. Finally, some significant findings are also presented in the context of the aeroelastic instability phenomena.
- Subjects :
- Physics
Mechanical Engineering
media_common.quotation_subject
Context (language use)
02 engineering and technology
Mechanics
Wake
Inertia
01 natural sciences
Kármán vortex street
010305 fluids & plasmas
Cylinder (engine)
law.invention
Vortex
Physics::Fluid Dynamics
Vibration
Aerodynamic force
020303 mechanical engineering & transports
0203 mechanical engineering
law
0103 physical sciences
media_common
Subjects
Details
- ISSN :
- 08899746
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- Journal of Fluids and Structures
- Accession number :
- edsair.doi...........9546069280b7e0c886caa686605c001e