Non-stationary and non-Gaussian features of mountain terrain measured wind
XIN Yabing1,2, LIU Zhiwen1, SHAO Xudong1, LU Shandong2
1. Hunan province key laboratory for wind engineering and bridge engineering, Hunan Univ., Changsha, Hunan, 410082, China;
2.Xiandai investment company limited, Changsha, Hunan, 410004, China
Abstract:In order to analyze non-stationary and non-Gaussian features of wind samples measured at mountain terrain bridge site, their non-stationarity was quantitatively detected firstly with the augment Dickey Fuller (ADF) method in statistics.Then, the time-varying mean speed of non-stationary wind was extracted with the wavelet transform method.Finally, Gaussian features of measured wind samples’ fluctuating wind speeds were contrastively analyzed with the stationary wind speed model and non-stationary one.The results showed that sudden wind samples may appear at mountainous terrain; for common non-stationary wind samples and sudden wind samples, their time varying mean speed maximum values calculated using the non-stationary wind speed model are greater than the 10min mean wind speed maximum ones calculated using the stationary wind speed model; fluctuating wind speeds of common non-stationary wind samples calculated using the stationary and non-stationary wind speed models, respectively are close to Gaussian distribution; fluctuating wind speeds of sudden wind samples calculated using the stationary and non-stationary wind speed models, respectively are non-Gaussian distribution.
辛亚兵1,2,刘志文1,邵旭东1,卢山东2. 山区地形实测风非平稳特性和非高斯特性分析[J]. 振动与冲击, 2018, 37(21): 247-252.
XIN Yabing1,2, LIU Zhiwen1, SHAO Xudong1, LU Shandong2. Non-stationary and non-Gaussian features of mountain terrain measured wind. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 247-252.
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