Modified higher-order wake oscillator model for vortex-induced vibration of circular cylinders

作者: A. Farshidianfar , N. Dolatabadi

DOI: 10.1007/S00707-013-0819-0

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摘要: In the present study, a modified model is introduced to estimate structural oscillation amplitude of circular cylinder during lock-in in vortex-induced vibration phenomenon. The includes same van der Pol term as classic model, while its coefficients are assumed be variable. This utilized bring about compliance between theoretical solution and experimental results. Then, fifth-order aerodynamic added, optimized using new straightforward method. Here, displacement, velocity acceleration coupling terms used solve system equations. response coupled equations harmonic. A linear approach adopted simplify derive solutions algebraically. results plotted for function reduced maximum versus Skop–Griffin parameter. Finally, these compared with those wake oscillator model. evinces an exact measurements regarding amplitude, range, some hysteresis mass damping ratio attributes, reduces sensitivity type through adding term.

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