Effects of Low Stiffness and Tuned Damper Fastener on Track System

Noises caused by track and rail vibration are one of major problems affecting urban rail transit development. Resilient rail fasteners come to be a main measure of reducing vibration and noise. Low stiffness of fastener functions well in vibration isolation, but might cause more vibration of rails, while the tuned damper floating rail fastener can make that up. In this research, the simulation is used to fit onsite measured data, then the data is used to build vehicle-track-foundation model to do the calculations.According to the results, the tuned damper floating rail fastener can reduce the vibration of trackbeds and ground as well as the vibration of steel rails including vibrations at around pinned-pinnerd frequency, so as to decrease the growth of rail corrugation.