Critical Velocity of High-speed Train Running on Soft Soil and Induced Dynamic Soil Response

CFD Simulation of High-speed Trains: Train-induced Wind Conditions on Trackside Installations

Speed is the created air flow as well as slipstream effects as the trains move. These effects can have some level of impact on fuel and energy efficiency  of  the  train,  but  their  other  important  outcome  is  the emergence of turbulent flows at higher speeds which can cause aerodynamic  drag  forces  followed  by  noise  and  vibration.  Thus, slipstream effects have significant importanc...

Soil Mechanics of High Speed Rail Tracks

As high speed rail is becoming increasingly popular around the globe, alignments are being forced onto marginal land due to land costs and the requirement for straight tracks. Rail foundations spread the applied wheel loads to prevent damage to the underlying in-situ soil upon which tracks are built. Designs which cannot sustain the resulting stresses will cause serviceability issues and will r...

Soft Soil Seismic Design Spectra Including Soil-structure Interaction

Design spectrum is known as an essential tool in earthquake engineering for calculation of maximum (design) responses in a structural system. Soil-structure interaction (SSI), as a phenomenon of coupling of responses of a structure and its underlying soil, was explored after introduction of design spectra and has not been taken into account in developing a design spectrum traditionally. To cons...

Effect of soil composition on critical water erosion shear stress

Dynamic Control of High-speed Train following Operation

Both safety and efficiency should be considered in highspeed train following control. The real-time calculation of dynamic safety following distance is used by the following train to understand the quality of its own following behaviour. A new velocity difference control law can help the following train to adjust its own behaviour from a safe and efficient steady-following state to another one ...