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通过对润扬大桥健康监测系统获取的长期实测风场数据进行分析,获得了南塔塔顶300d的平均风速、风向、湍流度、阵风因子、湍流积分尺度、脉动风功率谱等风场特性参数的分布规律以及参数之间相关性的推荐公式。并与跨中风速仪测试数据进行对比分析,得到了平均风速随高度的变化规律以及两点间风场的空间相关性。长期实测结果统计分析表明,润扬大桥悬索桥南塔塔顶的平均风速较小、风向稳定;风场的湍流度比跨中更强,并高出规范建议值近7倍;湍流积分尺度接近正态分布,并与湍流度、平均风速存在一定的相关性;纵向、横向功率谱均与Kaimal谱相差较大,功率谱密度函数参数与平均风速存在直接相关性;塔顶风场与跨中风场相关性较弱。
By analyzing the long-term measured wind field data obtained by Runyang Bridge Health Monitoring System, the wind field parameters such as average wind speed, wind direction, turbulence degree, gust factor, turbulence integral scale and pulsating wind power spectrum at the top of Nanta Tower for 300 days were obtained. The distribution of the law and the parameters of the correlation between the recommended formula. And compared with the test data of the mid-aerogeometer, the variation law of the average wind speed with height and the spatial correlation of the wind field between two points were obtained. The statistical analysis of the long-term measured results shows that the average wind speed at the top of the south tower of Runyang Bridge suspension is small and the wind direction is stable. The turbulence degree of the wind field is stronger than that of the span and is nearly 7 times higher than the normative value. There is a certain correlation between turbulence and average wind speed. The longitudinal and transverse power spectra have a large difference with Kaimal spectrum, and the power spectral density function parameters are directly related to the average wind speed. The top wind field is related to the cross wind field Weak sex.