The Research On Route Alignment Parameter And Line-Vehicle Dynamic Response Of High Speed Urban Rail Transit

With the increasing population and expanding space development of the city,travel distance has increased and travel demand diversification.The demand for speed of urban rail transit is increasing,urban rail transit which design speed target value is between 80?100km/h can't meet the some demand.It is very necessary to build high speed urban rail transit with higher speed level and stronger bearing capacity.High speed urban rail transit is lacking of code now.The Code for design of urban rail transit now is not suitable for the urban rail transit design speed target value more than 100 km/h.What's more,it is different from the high speed railway and other railway.It is very import to research the alignment parameter and other parameter of high speed urban rail transit.The main contents of this dissertation are as follows:1.This dissertation research the high speed urban rail transit domestic and overseas.According to our country urban development present situation and prospects,discusses the system,speed and vehicle suit to China's high speed urban rail transit.2.This dissertation research the methods of determining alignment parameter in metro and other rail transit which has common with high speed urban rail transit.According to the technical and development characteristics of China's urban rail transit,proposes alignment parameters of high speed urban rail transit.3.This dissertation establishes line-vehicle dynamic model of high speed urban rail transit in SIMPACK to research the dynamic simulation around line parameters of high speed urban rail transit.This dissertation creates the method of establish the line-vehicle dynamic model and chooses the method and index to evaluate the dynamic simulation.4.Using the established line-vehicle dynamic model,this dissertation set a variety of different conditions to research the dynamic simulation about line parameters of high speed urban rail transit proposed previously,such as curve radius,length of transition curve,radius of vertical curve and length of grade section.Then,this dissertation use the dynamic evaluation index to evaluate the data of different dynamic index,and evaluated the line parameters proposed previously and proposes some optimization suggestions.The main results of this dissertation are as follows:1.For China's high speed urban rail transit,the steel wheel system is the most suitable system,the most suitable range of maximum running speed is between 120 km/h and 160km/h and the more suitable vehicle system is CRH6 EMU when maximum running speed at 160km/h.2.Using CRH6 vehicle with running speed at 160km/h,the recommendations about alignment parameters of high speed urban rail transit are as follows.Maximum curve superelevation can take 140mm(in ordinary situation)and 150mm(in difficult situation).Maximum deficient superelevation can take 75mm(in ordinary situation)and 90mm(in difficult situation).Minimum curve radius can take 1500m(in ordinary situation)and 1300m(in difficult situation).When the minimum curve radius is 1500m,the minimum length of transition curve in difficult situation can take 300m.Maximum gradient can take 20‰(in ordinary situation)and 30‰(in difficult situation).Minimum length of gradient section can take 250m.Minimum radius of vertical curve can take 15000m(in ordinary situation)and 8000m(in difficult situation).