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在魏善庄-安定道口处进行了测量试验,沿钢轨布置了6个测点,测得18趟列车振动时产生的108条加速度波形,并进行了数据处理和分析,对每条加速度-时间历程曲线的均值进行了统计,通过最小二乘法拟合出加速度均值随距离衰减的相关函数,并在距钢轨10m处模拟了三个不同跨度的网架,分别进行了静力、自振频率和振型以及动力响应的计算,并把动力计算与静力计算进行了比较,得出动力响应与结构跨度之间的关系.
A measurement experiment was conducted at the Weishanzhuang-Anding crossing. Six measurement points were arranged along the rails. Eighty eight acceleration waveforms were generated when 18 trains were vibrating. Data processing and analysis were performed for each acceleration-time history curve. The mean values were counted, and the correlation function of the mean acceleration decayed with distance was fitted by the least squares method, and three different spans of the grid were simulated at a distance of 10m from the rail, and the static, natural frequency and mode shapes were respectively performed. And calculate the dynamic response, and compare the dynamic calculation with static calculation, and get the relationship between dynamic response and structural span.