1st International Conference on Acoustics & Vibration (ISAV2011) , 2011-12-21

Title : ( Consideration of Lock-in Using a Modified Wake Oscillator in Vortex Induced Vibrations about a Cylinder )

Authors: Anoshirvan Farshidianfar , Nader Dolatabadi , Yousef Naranjani ,

Citation: BibTeX | EndNote

In the present study, a Modified-Landl model is introduced to estimate the structural oscilla- tion amplitude of a circular cylinder, which is subjected to a fluid flow, during lock-in. The Modified-Landl model is exactly the same as Landl model with regard to the van der Pol and forth order terms while just the coefficients are modified and corrected in a different way than Landl and with a new approach. Here, the displacement, velocity and acceleration cou- plings are used to solve the Modified-Landl equation for wake oscillators. The response of the coupled equations is assumed to be harmonic. A linear approach is adopted to simplify and derive the solutions algebraically. The results for amplitude during lock-in versus the re- duced velocity and maximum structural oscillation amplitude versus the Skop-Griffin pa- rameter are plotted and compared with those of Facchinetti and de Langre. The present modi- fied model evinces a better compliance with experiment with respect to van der Pol model.

Keywords

, VIV; wake oscillator model; van der Pol equation; Skop, Griffin
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@inproceedings{paperid:1025675,
author = {Farshidianfar, Anoshirvan and Dolatabadi, Nader and Naranjani, Yousef},
title = {Consideration of Lock-in Using a Modified Wake Oscillator in Vortex Induced Vibrations about a Cylinder},
booktitle = {1st International Conference on Acoustics & Vibration (ISAV2011)},
year = {2011},
location = {Tehran, IRAN},
keywords = {VIV; wake oscillator model; van der Pol equation; Skop-Griffin plot.},
}

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%0 Conference Proceedings
%T Consideration of Lock-in Using a Modified Wake Oscillator in Vortex Induced Vibrations about a Cylinder
%A Farshidianfar, Anoshirvan
%A Dolatabadi, Nader
%A Naranjani, Yousef
%J 1st International Conference on Acoustics & Vibration (ISAV2011)
%D 2011

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