Wind and Structures

  • 제37권4호
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  • Pages.315-329
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  • 2023
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Observational analysis of wind characteristics in the near-surface layer during the landfall of Typhoon Mujigae (2015)

  • Lin Xue (School of Finance, Yunnan University of Finance and Economics) ;
  • Ying Li (State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences) ;
  • Lili Song (Chinese Academy of Meteorological Sciences)
  • 투고 : 2023.02.11
  • 심사 : 2023.09.28
  • 발행 : 2023.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

We investigated the wind characteristics in the near-surface layer during the landfall of Typhoon Mujigae (2015) based on observations from wind towers in the coastal areas of Guandong province. Typhoon Mujigae made landfall in this region from 01:00 UTC to 10:00 UTC on October 4, 2015. In the region influenced by the eyewall of the tropical cyclone, the horizontal wind speed was characterized by a double peak, the wind direction changed by >180°, the vertical wind speed increased by three to four times, and the angle of attack increased significantly to a maximum of 7°, exceeding the recommended values in current design criteria. The vertical wind profile may not conform to a power law distribution in the near-surface layer in the region impacted by the eyewall and spiral rainband. The gust factors were relatively dispersed when the horizontal wind speed was small and tended to a smaller value and became more stable with an increase in the horizontal wind speed. The variation in the gust factors was the combined result of the height, wind direction, and circulation systems of the tropical cyclone. The turbulence intensity and the downwind turbulence energy spectrum both increased notably in the eyewall and spiral rainband and no longer satisfied the assumption of isotropy in the inertial subrange and the -5/3 law. This result was more significant in the eyewall area than in the spiral rainband. These results provide a reference for forecasting tropical cyclones, wind-resistant design, and hazard prevention in coastal areas of China to reduce the damage caused by high winds induced by tropical cyclones.

키워드

과제정보

This work was financially supported by the National Key R&D Program of China (Grant 2023YFC3008501), National Natural Science Foundation of China (Grants 42005141, 41930972 and 72263033), the Yunnan Fundamental Research Projects (Grant 202001AU070089), the Open Grants of the Joint Open Lab on Meteorological Risk and Insurance (2023F010), the Scientific Research Projects of Yunnan University of Finance and Economics (2018B11), the Key Research and Development Plan of Yunnan Province (202203AC100003), and Financial Innovation Center of Southwestern University of Finance and Economics (FIC2021C0012). The authors also would like to express their sincere gratitude to the reviewers and editors for their constructive comments and helpful suggestions.

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