The Study Of Lateral-Torsional Coupling Vibration Of Base-Foundation-Eccentric Structure Interaction System Caused By High-Speed Train

With the development of high-speed railway in China, the train’s speed has been over300km/h, more and more attention have been gave to the attendant environmental issues.When the train passes nearby houses, the strong vibrations will cause the vibration of the floorand glass, which not only affect people’s lives, but also had an impact on production,especially after the precision instruments, scientific research units and laboratories, where theinfluence can not be ignored. There are a lot of research have been done at home andabroad.Over the years, the railway vibration on the surrounding environment are concentratedin the vertical vibration caused by trains running on the level of vibration on the research areoften not paid enough attention, in particular, the vibration caused by trains running onirregular structures are not many impact studies. In this paper, the train tracks through theestablishment of the foundation structure of three-dimensional finite element model ofeccentric numerical analysis.In this paper, a three-dimensional numerical model of base-foundation-eccentricstructure is established to study of lateral-torsional coupled vibration ofbase-foundation-eccentric structure interaction system caused by high-speed train.Respectively analyze on vibration of single eccentric frame that the static eccentricity isparallel and vertical to direction of the track at different speeds. The affection of the depth ofthe foundation to the vibration is also studied. The main contents of this paper include:1. Study the establishment of the track-the roadbed-Basic-Single eccentricthree-dimensional numerical model.Combined with the existing theory of orbital dynamics, uses an excitation function tosimulate the wheel-rail excitation force of different vehicle.Parameters of the train is CHR1.The exciting forces were taken the speed of216km/h,252km/h,288km/h.2. The analysis of torsional effect of single-layer eccentric structure based on differenteccentricity and different vehicle speeds.The change of static eccentricity is achieved by changing the distribution of the qualityof the floor. Study the torsional effect of the different static eccentricity under same speed. Study the torsional effect of the same condition of eccentricity under different speeds.Respectively analyze on vibration of single eccentric frame that the static eccentricity isparallel and vertical to direction of the track at different speeds.3. Analyze on vibration of eccentric structure with different depth of the foundationunder different speeds. Three kinds of foundations respectively is raft board foundation whichthe foundation burying depth are the1.3m, raft board foundation which the foundationburying depth is0.5m, surface foundation which the base altitude are0.5m.4. Researched vibration response of beat non-fragments track-ground-foundation-multi-layer portal frame. In this paper, three-dimensional numerical model is established toresearch vibration response of the Non-ballasted track to the multi-layered frame.The vibration of lateral-torsional coupled vibration of base-foundation-eccentricstructure interaction system caused by high-speed train is first studied in this paper, conductedby research on the content of the study draw some conclusions which provide a reference forthe environment vibration caused by the non-ballasted track vibration.