Vibration Performance Research On Floating Slab Track Of No.2Railway In Guangzhou

This paper focuses on analyzing to the vibration characteristics of No.2 metro line in Guangzhou in the angle of vibration of low frequency, both aspects of frequency domain and time domain. According to research feature, vertical wheel-rail coupling model of train-slab rack is established. In the model, car subsystem uses entire car considering the interaction between wheels and bogies, at the meantime, track subsystem considers the influence of rail, fasteners, and floating-slab and under-slab rubber bearings.In the angle of frequency domain, the aspect of different mass, length and height of floating slab, also different fastener stiffness and under-slab stiffness, five aspects in all are considered.From the phase of time domain, consulting the selection to different classes of track power spectrum in and abroad, the method of transferring track power spectrum to track irregularity time domain characteristics is given. Finally, the influence of different aspects, such as running speed, carrying situation and under-rail stiffness, also under-slab stiffness are considered. Additionally, the outcome is compared with the report of Guangzhou metro vibration. Ultimately, optimization of the floating-slab track is given in the aspect of designing.