A study on nonlinear aerodynamic effect of a vibrating thin plate section in windless condition

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (8) : 239-244.

YING Xuyong1,2, ZHANG Zhe3

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Abstract

Based on an arbitrary lagrange-euler (ALE) method and a weak coupled method, a numerical model for calculating the wind-induced response of section was developed.The mathematical expression of aerodynamic forces for vibrating section in windless condition is proposed.The free vibration response of a thin plate section in windless condition was simulated, and the nonlinear vibration frequency and damping ratio were calculated.The results indicate that the unsteady aerodynamic forces acting on vibrating section in windless condition can be effectively described by the presented aerodynamic force model.For the vibrating section in windless condition, the interference to the ambient air for the vertical motion is larger than that for torsional motion.The aerodynamic effect of vibrating section in windless condition cannot be neglected; otherwise, the error will be increased.The free vibration response of thin plate section in windless condition is significantly influenced by initial excitation.

Key words

windless condition / thin plate section / nonlinear aerodynamic effect / computer fluid dynamics(CFD)

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YING Xuyong1,2, ZHANG Zhe3. A study on nonlinear aerodynamic effect of a vibrating thin plate section in windless condition[J]. Journal of Vibration and Shock, 2020, 39(8): 239-244

References

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