Floating Slab Track Power Design Parameters

In recent years,metro lines have witnessed rapid development in many metropolitan cities,where they are generally surrounded by residential areas with large amount of buildings.Nowadays,with the development of economy,people are becoming increasingly aware of environment protection and they are requiring better living conditions.what's more,the ideal of sustainable development of economy and environment has also been proposed.Therefore,the vibration and noise caused by metro lines as well as its rapid development are attracting more attention. Many countries in the world have started their research on this subject.Floating slab track is an effective way which can sharply reduce vibration and noise.And it is also a new structure applied to use in our country recently to protect building and structures that are sensitive to vibration and require high leve of sound-proofing.Based on structural characteristics of flaoting slab track,this paper estabilished a vertical coupling dynamic model of railway train-floating slab track system,it is separated as 20-degree of vertical vibration freedoom finite element model,taking the track between two neighboring fastenings as a atrack unit(actually it is a small section of low vibration track).The locomotive is simulated as a 6-freedom multi-body model.On this foundation ,based on the principle of total potential energy with stationary value in elastic dynamics and the rule of "set-in-right-position"for formulating system matrixes,the paper inferred every part's vibration total potential energy,established the urban railway train and floating slab track vertical vibration equation and wrote a calculating and analysing program accordingly in Fortran.To verificate the reliability of the model presented above,we introduced the parapmenters of metro train and floating slab track in reference[74] was applied.Basing upon model and procedures in the paper,and calculated the vibration responses of the system of the metro train running on the floating slab track at 60km/h was calculated.By comparision with the reference[74] in the paper,we find the calculated results accord with that of the reference[74].Thus,the reliability of the model and produre presented in the paper is veritificated.Finally,the paper studied the dynamic response of metro train and floating slab track system under the influence of various factors,such as the stiffness of the track pad,the stiffness of the spring of the floating slab,the distance of the spring of the floating slab,the failure of fastener of the track.The paper also put forward some advices after analysing and evaluating the calculated results.