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首页> 外文期刊>Journal of Wind Engineering and Industrial Aerodynamics: The Journal of the International Association for Wind Engineering >Wavelet analysis of the relation between atmospheric wind and pressure fluctuations on a low-rise building
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Wavelet analysis of the relation between atmospheric wind and pressure fluctuations on a low-rise building

机译：小高层建筑大气与压力波动关系的小波分析

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摘要

The continuous wavelet transform is applied to simultaneously measured velocity components of atmospheric wind and surface pressure on low-rise buildings. The resulting time-scale representation of wavelet transform coefficients is used to relate velocity and pressure scales. The wavelet cross-scalogram is used to indicate which events in the velocity and pressure fluctuations take place at the same scale and the same time. The results show that when large peaks appear in the u- and, as importantly, v-components of the velocity, low-pressure peaks appear in the pressure fluctuations. Furthermore, the cross-scalogram shows that there is a clear relationship between energetic events in the flow and the appearance of pressure peaks. Specifically, the low-pressure peaks occur at the same scale and time as they do in the incident velocity fluctuations.
机译：连续小波变换适用于同时测量低层建筑上的大气风速和表面压力的分量。小波变换系数的时间尺度表示结果用于关联速度和压力尺度。小波交叉比例尺图用于指示速度和压力波动中的哪些事件以相同的比例和时间发生。结果表明，当速度的u分量和重要的v分量出现大的峰值时，压力波动中会出现低压的峰值。此外，横截面图显示，流动中的高能事件与压力峰值的出现之间存在明确的关系。具体而言，低压峰的发生与入射速度波动中的发生时间和时间相同。

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