強風時自然風の平均流方向変動風速の空間構造に関する実測的研究 : 強風観測資料に基づく鉛直横方向の検討

概要

論文の詳細を見る
For several years authors have been trying to observe high winds for the studies on the response behaviors of line-like structures in high winds. Two high power transmission towers at Sendai and Matsushima in the west coast of Kyushu were selected as the observation towers. Ten or eight wind pressure transducers, which were used as anemometers with high frequency response properties and controlled against the mean wind direction and five propellor anemometers were set on towers. The data of moderately high velocities of winds caused by a typhoon and a winter storm satisfactorily recorded. In this papers the results of power spectra, auto-correlations, cross-correlations and normalized co-spectra estimated from these data are discussed and compared with the theoretical values based on the theory of isotropic turbulence. The resulting conclusions are as follows; 1. The estimated power spectra and auto-correlations agree well with the theoretical values. 2. The estimated cross-correlations and normalized co-spectra correspond to the theoretical values in the most parts expect the lower layers which have a steep gradient of the mean winds. 3. Thus the atmospheric turbulence of horizontal gustiness are considered to be fundamentally isotropic.
1982-01-30