As one of the main aerodynamic noise sources of high-speed trains, the bogie is a complex structure containing many components and the flow around it is extremely dynamic with high-level turbulence. Flow around a simplified bogie at scale 1:10 is studied numerically using Computational Fluid Dynamics (CFD) for comparison with experimental measurements. The upstream inlet flow is represented as ...

• The counterweight acts as the friction pendulum to form all-in-one prototype. power density can reach 1982 W m ?3 . prototype drive daily used electric appliance and wireless sensor. serve a speed sensor detect motion state of vehicles. supports self-powered real-time bogie frames monitoring. To maintain desirable service quality operational safety, monitoring unit integrated with vibration e...

Torsional vibrations phenomena are self-excited that occur in the wheelset of railway powertrains due to counter-phase oscillation both wheels. Long-lasting events this type may lead catastrophic failures. Therefore, torsional vibration suppression and mitigation methods have drawn significant attention from industry recent few years. Conventional reduce motor torque once is detected. However, ...

The issues of filling the information model with data on state wheel-rail tribosystem are considered. “Program for modeling transverse position a wheelset in track” is used, and main modules program described. geometrical parameters contact wheel profile rail obtained. values nominal extreme intermediate positions pair track calculated. displacement track, its slope, width rail, gap between cre...

Field tests using an instrumented powered wheelset were performed to investigate fatigue damage accumulation in railway axles. Axle bending strains measured and post-processed obtain axle stress spectra. Statistical analyses used the variations of spectra due changes operation parameters. The study indicates that can be modeled truncated normal distributions, where large majority amplitudes are...