Analysis of Dyanmical Responses of Floating Slab Track System

Research purposes: With the increase of traffic consistency and load and speed,the(vibration) aroused by the traffic has brought a huge effect to the city's life and work environment,the(vibration) aroused by the traffic has brought environment social effects of pollution.Floating slab track system has all right performance of vibration reduction,it is widely used in engineering.Research methods: Establish double layer continuous viscoelastic beam model of floating slab track structure,the(vibration) responses of the track structure are obtained with application of compiled programs by Fourier transform and making use of a software MATLAB,and we gained maximum forces transmitted to the ground-frequency curses.Besides influences of elastomeric bearing rigidity and damping below the floating slab,unit length mass of floating slab on the(effectiveness) of the floating slab track system are investigated.Research results: We gained that the reasonable range of elastomeric bearing rigidity below the floating slab is in the range of 6～30 MN/m,choose the value of elastomeric bearing damping below the floating slab in the range of 40～(80 MN/m),and choose the value of unit length mass of floating slab in the range of 2 000～4 000 kg/m.Research conclusions: Floating slab track system has a very good effect of vibration reduction on the high frequency(vibration),and the less the value of elastomeric bearing rigidity below the floating slab is,the better the effect of vibration reduction is.