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摘要
To study the wind characteristics of thunderstorms and their dynamic effects on high-rise masts, the downburst wind records and the acceleration response were obtained on the 356 m Shenzhen Meteorological Gradient Tower (SZMGT). The characteristics of mean wind, turbulence, and wind spectrum for downbursts were analyzed, and the dynamic response of SZMGT to downburst outflows was further investigated. It is observed that the vertical profiles of thunderstorm change with time and the profiles at different moments are somewhat different from the current common empirical profiles. The variation of turbulence intensity with height during thunderstorms is not significant in regularity, and the wind spectrum is more consistent with the von Karman spectrum and Solari spectrum. The maximum dynamic response of SZMGT under the action of thunderstorm outflow appears in the ramp-up stage instead of the peak stage of thunderstorms, and the dynamic response as well as the along-wind vibration coefficient of the SZMGT both increase with height. The multimodal participation for the response of SZMGT is very obvious, and the effect of rope vibration is not negligible. ? 2023 Science Press.
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