Aeroelastic simulation of vortex-induced vibration and flutter based on CFD/CSD coupling solution

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (12) : 85-89.

LI Yong-le1, ZHU Jia-qi1,2, TANG Hao-jun1

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Abstract

Choosing the FLUENT as a tool, using the numerical solution of differential equation and the dynamic mesh model, CFD/CSD coupling solution based on loose coupling was realized by embedding the Newmark method into Fluent by UDF function. A 2D-square cylinder model was established to investigate the change of Strouhal number and maximum vertical vortex-excited amplitude of the square cylinder with wind speed. The lock-in phenomenon of vortex-excited resonance was observed during the simulation and compared with the result of static square cylinder. A 2D flat plate model with vertical and torsional degrees of freedom was established to identify the flutter derivatives of this flat plate and to determine the flutter critical wind speed. The simulation result agrees very well with the wind speeds calculated by the Scanlan’s formula and Selberg’s formula.

Key words

CFD-CSD coupling analysis / dynamic mesh / vortex-induced vibration / flutter / aeroelastic effect

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LI Yong-le1, ZHU Jia-qi1,2, TANG Hao-jun1. Aeroelastic simulation of vortex-induced vibration and flutter based on CFD/CSD coupling solution[J]. Journal of Vibration and Shock, 2015, 34(12): 85-89

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