ある島しょ部高度200mまでの強風時における乱流構造について 変動風速の縦方向成分と鉛直横方向成分の相互相関

藤村 真弓; 前田 潤滋; 森本 康幸

doi:10.14887/kazekosymp.20.0.3.0

PROCEEDINGS OF THE 20th NATIONAL SYMPOSIUM ON WIND ENGINEERING

DOI https://doi.org/10.14887/kazekosymp.20.0.3.0

Conference information

Co-host: The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japan Society of Civil Engineers, Meteorlological Society of Japan, Architectural Institute of Japan, Japan Association for Wind Engineering

TURBULENT STRUCTURE UP TO HEIGHT OF 200M AT AN ISLAND POINT UNDER STRONG WINDS

CROSS-CORRELATION BETWEEN LONGITUDINAL AND LATERAL WIND SPEEDS

*Mayumi FUJIMURA, Junji MAEDA, Yasuyuki MORIMOTO

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Keywords: Transmission tower, Strong wind observation, Turbulence structure, Cross-correlation

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 3

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Abstract

We report on the structure of atmospheric turbulence especially focusing on the spatial correlations of three fluctuating components of wind speed using our record measured at a transmission tower located at the tip of a cape, which are required for simulations of the dynamic response of a coupled tower-and-conductor system and of the trajectory of a flying debris under a strong wind. According to our results, the profiles of longitudinal and lateral wind speeds in typhoons were different from those in non typhoons. And we showed that cross-correlations between the longitudinal and lateral components of the fluctuating wind speeds were explained by the theoretical expressions in the isotropic turbulence theory, using the covariance coefficients of the longitudinal and lateral components normalized by the longitudinal scale of turbulence of the longitudinal wind speed.

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