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基于离散的Fourier变换原理,对过渡段基床振动加速度进行频域分析,获取了基床表层的振动加速度幅值谱、功率谱、相位谱以及线路不同横断面的基床表层振动第一主频值随速度变化规律;通过对过渡段路基不同工况下动态响应的原位测试,分析了路桥(涵)过渡段线路纵向的动态响应以及车速、轴重与动态响应之间的关系和动应力沿路从深度方向的变化规律等。上述这些数据分析结果,为高速铁路过渡段的设计与施工提供了重要参考。
Based on the discrete Fourier transform theory, the vibration acceleration in the transitional bed was analyzed in frequency domain. The amplitude spectrum, power spectrum, phase spectrum and the first fundamental frequency of the bed surface vibration The dynamic response along the transitional section of the road and bridge (culvert) is analyzed. The relationship between the dynamic response and the relationship between vehicle speed, axle load and dynamic response and dynamic stress Along the road from the depth direction of the law of change. The above data analysis results provide an important reference for the design and construction of high-speed railway transitional section.