Case Study of Wind-Induced Vibration of a Cooling Tower Under Typhoon Environment
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Abstract:
As high-rise cooling towers are constantly emerging, wind effects on this kind of wind-sensitive structures have attracted more and more attention, especially in typhoon prone areas. Terrain Type B turbulent flow fields under the normal wind and typhoon are simulated by active wind tunnel technology, and rigid-pressure-measurement model and aero-elastic-vibration-measurement model of a large cooling tower are built. The stagnation point, peak suction point, separation point and leeward point of the throat position shell are selected to analyze pressure coefficient, probability distribution, peak factor, power spectral density and dynamic amplification factor under normal wind and typhoon. It is clarified that there exists a significant non-Gaussian characteristic under typhoon condition, which also exists in structural response level. Resonance response ratio of the total response is higher during typhoon condition. The maximum value of dynamic amplification coefficient under typhoon field is up to 1.18 times over that under normal wind. The findings of this study are expected to be of interest and practical use to professional and researchers involved in the wind-resistant designs of super-large cooling towers in typhoon prone regions.
XING Yuan, ZHAO Lin, CHEN Xu, GE Yaojun. Case Study of Wind-Induced Vibration of a Cooling Tower Under Typhoon Environment[J]. Transactions of Nanjing University of Aeronautics & Astronautics,2020,37(1):108-119