Effect of train speed and track geometry on the ride comfort in high-speed railways based on ISO 2631-1
Effect of train speed and track geometry on the ride comfort in high-speed railways based on ISO 2631-1
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DOI：
10.1177/0954409719868050
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Chi Liu;D. Thompson;M. Griffin;M. Entezami
中科院分区：
文献类型：
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作者：
Chi Liu;D. Thompson;M. Griffin;M. Entezami
旅客列车的运行速度一直在提高，现在经常超过300公里/小时。更高的速度会导致振动增加，降低铁路乘客的乘坐舒适度。本研究旨在探讨速度与轨道几何形状对高速列车振动不适的综合影响。使用具有各种复杂程度的铁路车辆动态模型，并将高速轨道的一部分的测量几何形状作为输入。该模型已被校准与振动测量进行了列车运行在这一部分的轨道，然后应用于预测振动不适在增加的速度。为了评估速度高达400 km/h时的振动不适，轨道几何形状的信息应包括波长至少达150 m。垂直不规则性在所有速度下都有最大的影响，但横向不规则性也很重要。高速轨道的垂直和横向不规则性都应控制在50-100 m的波长下，该波长激发车体的刚性模式，对应于通常1-2 Hz的频率。此外，还应控制波长为5-12 m的垂直不规则性，这些不规则性激发车体的基本柔性模式，通常约为10-15 Hz。虽然它们对振动不适感的影响很小，但也评估了铁路超高、铁路超高变化率和竖曲线半径的影响。
The operational speeds of passenger trains have been increasing and now often exceed 300 km/h. Higher speeds can lead to increased vibration and reduced ride comfort for railway passengers. This study investigates the combined effect of speed and track geometry on vibration discomfort in high-speed trains. Railway vehicle dynamic models with various levels of complexity are used, with the measured geometry of a section of a high-speed track as an input. The models have been calibrated with vibration measurements carried out in a train running over this section of the track and then applied to predict the vibration discomfort at increased speeds. To evaluate the vibration discomfort at speeds up to 400 km/h, information on track geometry should include wavelengths up to at least 150 m. Vertical irregularities have the greatest effect at all speeds but lateral irregularities are also important. Both the vertical and lateral irregularities of a high-speed track should be controlled at wavelengths of 50–100 m that excite rigid modes of the car body, corresponding to frequencies of typically 1–2 Hz. Additionally, vertical irregularities with wavelengths of 5–12 m that excite the fundamental flexible mode of the car body, typically around 10–15 Hz, should also be controlled. The effects of cant, the rates of change of cant, and the radius of vertical curves are also evaluated although they only have a small effect on vibration discomfort.