在同济大学T J-3风洞试验室对大跨度球面网壳结构进行刚性模型测压试验.通过对结构表面风压信号进行连续及离散小波变换,得到各尺度小波系数时程.对结构表面测点信号的尺度能量比率,间歇能量比率及间歇因子三个参数进行比较性分析,得到以下结论:(1)尺度11处,环向测点尺度能量随位置的变化很小,而在尺度12处侧向测点1-7和1-19的尺度能量明显大于其他区域,约为迎风及背风区域测点1-1和1-13的2倍；(2)测点1-7和1-19的间歇能量主要集中在尺度11处,而测点1-1和1-13的间歇能量在各尺度分布较为均匀；(3)测点1-1,1-7,1-13和1-19的间歇因子随尺度的变化趋势相似,在低尺度区变化平缓而在高尺度区域迅速增大.上述说明,结构表面不同区域的风压信号间歇特性不尽相同,可以进一步为结构风压基本特性的精细化分析提供帮助.%The wind pressure measurement of a rigid model for long-span spherical shells was conducted in TJ-3 wind tunnel laboratory. In this paper, the continuous and discrete wavelet transform (CWT) are applied to the wind pressure signal to obtain intermittent events and wavelet coefficients of individual time series, respectively. Scale energy ratio, intermittent energy ratio and intermittent factor are studied by comparing them with the wind pressure from different location on the surface of the structure. Conclusions are drawn as follows: (1) At scale 11, the scale energies at circumferential measuring points have little changes with the position variation; but at scale 12, the scale energies at lateral measuring points 1-7 and 1-19 are significantly greater than those in other areas, about twice of those at points 1-1 and 1-13 in the windward and leeward areas, respectively. (2) Intermittent energies at points 1-7 and 1-19 mainly occur at scale 11, but the intermittent energies at point 1-1 and 1-13 are uniformly distributed with different scales. (3) Intermittent factors at points 1-1, 1-7, 1-13 and 1-19 have similar trend with different scales, which change slightly at low scales and increase rapidly at high scales. Therefore, we can see that the intermittent characteristics of wind pressure is different at different locations. These conclusions may be helpful for futher analysis of wind pressure characteristics.
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