山区地形实测风非平稳特性和非高斯特性分析

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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.

Key words： non-stationary wind non-Gaussian feature transient wind wavelet transform method ADF method

Received: 31 March 2017 Published: 28 October 2018

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	Articles by authors
	XIN Yabing1
	2
	LIU Zhiwen1
	SHAO Xudong1
	LU Shandong2

Cite this article:

XIN Yabing1,2,LIU Zhiwen1, et al. Non-stationary and non-Gaussian features of mountain terrain measured wind[J]. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 247-252.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2018/V37/I21/247

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