Vibration Transmission Characteristics of Typical Vibration-Attenuating Track-Vehicle Coupled Systems

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Vibration Transmission Characteristics of Typical Vibration-Attenuating Track-Vehicle Coupled Systems

Zhang, Tao / Jiang, Peibin / Chai, Feifan / Ling, Liang / Wang, Kaiyun

To meet the requirement of environmental vibration along the urban rail transit, vibration-attenuating track structures are widely used in special vibration-attenuating sections of metro railways. However, the vibration characteristics of different vibration-attenuating tracks are different due to the difference in supporting stiffness. In this study, a metro vehicle-track coupled dynamics model considering different types of vibration-attenuating tracks is applied to study the vibration characteristics of metro vehicles travelling on different vibration-attenuating track structures. The metro vehicle vibration characteristics and vibration transmission laws on different vibration-attenuating tracks are investigated through numerical simulations. The results show that the vibration characteristics are quite different for different vibration-attenuating track structures. The elastic-supporting-block track, the floating-slab track, and the ladder-type sleeper track have a good vertical vibration reduction effect in the frequency ranges of 0~10 Hz, 0~400 Hz, and 0~200 Hz, respectively. These track structures also have a good lateral vibration reduction effect in the frequency ranges of 40~70 Hz, 7~70 Hz, and 40~400 Hz, respectively.