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地铁振动是个复杂的系统问题,涉及列车类型、轨道结构、线路状况和行车速度等诸多因素。在轨道结构周期性频域解析模型的基础上,结合地铁现场锤击试验和振源测试,建立变速及曲线车轨耦合频域解析模型,研究地铁减振轨道的动力特性,主要研究内容和结论如下。(1)在轨道结构周期性频域解析模型的基础上,结合地铁现场锤击试验,计算轨道结构在单位脉冲荷载下的频响函数,分析轨道结构的动力响应
Subway vibration is a complex system issue that involves many factors such as train type, track structure, line condition and speed of travel. Based on the periodic frequency-domain analytical model of orbital structure, combined with the field hammering test and vibration source test, the analytical model of frequency-changing and curved-rail coupled frequency domain is established to study the dynamic characteristics of the subway vibration-damping track. The main contents and conclusions as follows. (1) Based on the periodic frequency domain analysis model of orbital structure, combined with the field hammering test, the frequency response function of orbital structure under unit pulse load is calculated, and the dynamic response of orbital structure