1.Department of Military Facilities, Army Logistical Engineering University of PLA, Chongqing 401331, China;
2.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Abstract：For linear elastic structures subjected to the fluctuating pressure of Gaussian-velocity turbulence, such as wind, dynamic responses or behaviors of the structures will show non-Gaussian distribution due to the quadratic term of fluctuating velocity theoretically.An experiment research on the dynamic responses and non-Gaussian characteristics of a single-degree-of-freedom(SDOF) linear elastic model subjected to Gaussian-velocity turbulence with different turbulence intensity was carried out.The non-Gaussian acceleration responses of the linear SDOF model as well as its correlation with turbulence intensity were analyzed.Finally, three approximation models with non-Gaussian probability density function(PDF) were discussed.The experiment results indicate that the acceleration responses of the SDOF model are of non-Gaussian distribution with high kurtosis of the PDF.With the increase of turbulence intensity, the kurtosis of non-Gaussian PDF will be magnified.The results also show that the Gaussian mixture model is much more valid for approximating non-Gaussian PDF compared to the Gram-Charlier series or Edgeworth series.
赵启明1，石少卿1，杨朝山1，张鹏2. 高斯流场中单自由度线性体系非高斯振动响应试验研究[J]. 振动与冲击, 2020, 39(2): 9-15.
ZHAO Qiming1，SHI Shaoqing1，YANG Chaoshan1，ZHANG Peng2. Experimental study on non-Gaussian dynamic responses of a single-DOF linear-system subjected to Gaussian-velocity turbulence. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(2): 9-15.
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