Large eddy simulation for across-wind aeroelastic effects of super high-rise building under forced vibration

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (5) : 169-175.

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Large eddy simulation for across-wind aeroelastic effects of super high-rise building under forced vibration

TAN Chao1, QUAN Yong*1, ZHANG Zhengwei2, YAO Bo3, FU Guoqiang1

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Abstract

Compared with aeroelastic model wind tunnel test, forced-vibration model test offers a high degree of controllability in terms of parameters and is a significant means to study the aeroelastic effects of super high-rise buildings. However, the manufacturing difficulties of forced-vibration devices limit the widespread application of this method. In this study, Large Eddy Simulation (LES) is used to simulate the forced-vibration model wind tunnel test of super high-rise buildings, in order to investigate their aeroelastic effects. The results show that the proposed method in this study can effectively simulate the aerodynamic forces and flow field of forced-vibration model for super high-rise buildings. When the incoming wind speed is within the range of vortex-induced resonance (VIR) speeds, the increase in cross-wind amplitude of super high-rise buildings will significantly aggravate the vortex shedding on the side of the structure, resulting in a obvious increase in the side wind pressure and the root mean square values of the lift coefficient. However, when the reduced wind speed is far above the VIR speed, the cross-wind vibration of the structure has a little impact on its aerodynamic forces. The changes of amplitude and reduced wind speed have significant effects on the cross-wind aerodynamic stiffness and aerodynamic damping of buildings.

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Large eddy simulation / super high-rise building / forced-vibration / aeroelastic effects

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TAN Chao1, QUAN Yong1, ZHANG Zhengwei2, YAO Bo3, FU Guoqiang1. Large eddy simulation for across-wind aeroelastic effects of super high-rise building under forced vibration[J]. Journal of Vibration and Shock, 2025, 44(5): 169-175

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