Structural Engineering and Mechanics

Techno-Press (테크노프레스)
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Studies on the influence factors of wind dynamic responses on hyperbolic cooling tower shells

  • ZHANG, Jun-Feng (School of Civil Engineering, Zhengzhou University) ;
  • LIU, Qing-Shuai (School of Civil Engineering, Zhengzhou University) ;
  • GE, Yao-Jun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • ZHAO, Lin (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • Received : 2018.12.29
  • Accepted : 2019.03.21
  • Published : 2019.12.10
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Abstract

Wind induced dynamic responses on hyperbolic cooling tower (HCT) shells are complicated functions of structure and wind properties, such as the fundamental frequency fmin, damping ratio ζ, wind velocity V, correlationship in meridian direction and so on, but comprehensions on the sensitivities of the dynamic responses to these four factors are still limited and disagree from each other. Following the dynamic calculation in time domain, features of dynamic effects were elaborated, focusing on the background and resonant components σB and σR, and their contributions to the total rms value σT. The σR is always less than σB when only the maximum σT along latitude is concerned and the contribution of σR to σT varies with responses and locations, but the σR couldn't be neglected for structural design. Then, parameters of the above four factors were artificially adjusted respectively and their influences on the gust responses were illustrated. The relationships of σR and the former three factors were expressed by fitted equations which shows certain differences from the existing equations. Moreover, a new strategy for wind tunnel tests aiming at surface pressures and the following dynamic calculations, which demands less experiment equipment, was proposed according to the influence from meridian correlationship.

Keywords

Acknowledgement

Supported by : National Science Foundation of China

The authors would like to gratefully acknowledge the supports of National Science Foundation of China (51508523).

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