System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade

Description

During the last decades completely new technologies for high speed railway vehicles have been developed. The primary goals have been to increase traction, axle load, and travelling speed, and to guarantee safety of the passengers. However, the new developments have revealed new limitations: settlement and destruction of the ballast and the subgrade lead to deterioration of the track; irregular wear of the wheels cause an increase in overall load and deterioration of passengers comfort; damage of the running surfaces of the rail and the wheel becomes more frequent. This problems have been investigated in the Priority Programme SPP 1015 supported by the Deutsche Forschungsgemeinschaft (DFG), aiming at a better understanding of the dynamic interaction of vehicle and track and the long-term behaviour of the components of the system. The book contains the scientific results of the programme as presented at the concluding colloquium held at University of Stuttgart, Germany, March 13-15, 2002. Front Matter....Pages I-XIX The DFG Priority Programme System Dynamics and Long-Term Behaviour of Vehicle, Track and Subgrade....Pages 1-14 Front Matter....Pages 15-15 Vehicle/Track Interaction Optimisation within Spoornet....Pages 17-34 Active Suspension Technology and its Effect upon Vehicle-Track Interaction....Pages 35-50 Rolling-Contact-Fatigue and Wear of Rails: Economic and Technical Aspects....Pages 51-62 Front Matter....Pages 63-63 System Dynamics of Railcars with Radial- and Lateralelastic Wheels....Pages 65-84 Distributed Numerical Calculations of Wear in the Wheel-Rail Contact....Pages 85-100 Modeling and Simulation of the Mid-Frequency Behaviour of an Elastic Bogie....Pages 101-120 Wavy Wear Pattern on the Tread of Railway Wheels....Pages 121-132 Rotor Dynamics and Irregular Wear of Elastic Wheelsets....Pages 133-152 Front Matter....Pages 153-153 On the Numerical Analysis of the Wheel-Rail System in Rolling Contact....Pages 155-174 Experimental Analysis of the Cyclic Deformation and Damage Behavior of Characteristic Wheel and Rail Steels....Pages 175-190 Friction and Wear of Tractive Rolling Contacts....Pages 191-210 Model-Based Validation within the Rail-Wheel-Subgrade Modeling....Pages 211-228 Front Matter....Pages 229-229 Monitoring the Dynamics of Railway Tracks by Means of the Karhunen—Loève—Transformation....Pages 231-246 Combined Modelling of Discretely Supported Track Models and Subgrade Models — Vertical and Lateral Dynamics....Pages 247-264 Measurement and Modelling of Resilient Rubber Rail-Pads....Pages 265-274 Model-Based Investigation of the Dynamic Behaviour of Railway Ballast....Pages 275-294 The Dynamics of Railway Track and Subgrade with Respect to Deteriorated Sleeper Support....Pages 295-314 Front Matter....Pages 315-315 Numerical Model and Laboratory Tests on Settlement of Ballast Track....Pages 317-336 Track Settlement Due to Cyclic Loading with Low Minimum Pressure and Vibrations....Pages 337-356 Front Matter....Pages 315-315 Simulation of the Dynamic Behavior of Bedding-Foundation-Soil in the Time Domain....Pages 357-376 Dynamic Behavior of Railway Track Systems Analyzed in Frequency Domain....Pages 377-394 Experimental and Numerical Investigations on the Track Stability....Pages 395-410 Experimental Investigation and Numerical Modelling of Soils and Ballast under Cyclic and Dynamic Loading....Pages 411-430 3D-Simulation of Dynamic Interaction Between Track and Layered Subground....Pages 431-450 Rigid Body Dynamics of Railway Ballast....Pages 451-470 A Comparative Study of Results from Numerical Track—Subsoil Calculations....Pages 471-488