
结构振动对风特性测试结果的影响研究
Study on the Influence of Structural Vibration on Measured Results of Wind Characteristics
Field measurement is the main way to obtain the wind characteristics of structure site, thus the accuracy of measured data is very important. In order to conduct refinement researches on wind characteristics, the influence of structural vibration on wind characteristics was analyzed specifically in this paper. The time-history wind data in the same wind field are measured with and without anemometer-base vibration. The wind characteristics including the mean wind speed, turbulence intensity, turbulence integral scale and power spectral density under different cases are analyzed and compared. In this experiment, the measured lateral vibration of the deck of Runyang Bridge during typhoon Wipha and the white noise are employed as the anemometer-base signal inputs. Results show that structural vibration has little influence on the measured mean wind speed and turbulent wind characteristics when the measured lateral vibration of the deck is input. However, it may cause the turbulence intensity and power spectral density in along-wind direction slightly larger than the corresponding true value. Conclusions can provide reference for wind field measurement and data analysis of engineering structures.
结构振动 / 风特性 / 平均风速 / 紊流强度 / 紊流积分尺度 / 风速功率谱密度 {{custom_keyword}} /
structural vibration / wind characteristic / mean wind speed / turbulence intensity / turbulence integral scale / wind speed power spectral density {{custom_keyword}} /
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