Comparing dynamic performance between new sleeper-damping and floating-slab track system

Vibration induced by urban rail transit has become a global public concern. To reduce the vibration, a new Sleeper Damping Track with Elastic Side-Supporting Pads (SDTESSP) was proposed. To evaluate the dynamic performance of the SDTESSP, a spatial model of train-SDTESSP coupled dynamic and a finite element model of the track-tunnel-soil system were developed. Field tests were conducted to validate the models, and there is good agreement in both the time and frequency domains. Furthermore, the vibration transmissibility of the SDTESSP, train-SDTESSP coupled interaction, and train-induced environmental vibration were investigated by comparing it with the Floating-Slab Track (FST). The results indicate that the damping capacity of the SDTESSP can be close to that of the FST by adjusting the material parameters of the elastic side-supporting pads.

Automated summary

To reduce the vibration induced by urban rail transit, a new Sleeper Damping Track with Elastic Side-Supporting Pads (SDTESSP) was proposed. The dynamic performance of the SDTESSP was evaluated through the development of a train-SDTESSP coupled dynamic model and a track-tunnel-soil finite element model. Field tests validated the models, showing good agreement in both the time and frequency domains. The vibration transmissibility of the SDTESSP, train-SDTESSP coupled interaction, and train-induced environmental vibration were investigated by comparing it with the Floating-Slab Track (FST), and the results revealed that the damping capacity of the SDTESSP can be similar to that of the FST by adjusting the material parameters of the elastic side-supporting pads.