RESEARCH ON THE DESIGN FOR THE RUBBER VIBRATION ISOLATOR OF FLOATING SLAB TRACK

The urban rail transit (URT) improves the urban traffic environment and promotes the urban economic development evidently. But the vibration and noise caused by the URT disturb citizen' daily life seriously. In the past decades, many mature technologies for vibration and noise reduction of URT were used widely. Among them, rubber floating slab track structure is the most efficient controlling measure of track structure vibration. Design of the rubber floating slab track should take the travelling safety, coach comfort and vibration isolation effect into consideration comprehensively. But most existing researches always focus on one aspect, which may lead the dissatisfactions for the other requires. In this paper, a vehicle-rubber floating slab track-foundation dynamic analysis model is established to comprehensively analyze the dynamic response and vibration isolation effect of the rubber floating slab track caused by the change of design parameters of rubber vibration isolator. According to the analysis, distance, stiffness and damping value of the rubber support are optimized to get the purpose on guaranteeing travelling safety, improving the vibration reduction efficiency and coach comfort. The research results could be taken for reference for the design of the rubber floating slab track in the future.