three piece bogies are widely in use by the freight railway services throughout the world. in comparison with the other freight bogies they cost less and are easier to maintain. however, they do not exhibit favorable curving behavior. amongst the methods to improve the bogie performance is the proposal to introduce lateral clearance in the bogies’ axleboxs. in the case of the three piece bogies...

Three piece bogies are widely in use by the freight railway services throughout the world. In comparison with the other freight bogies they cost less and are easier to maintain. However, they do not exhibit favorable curving behavior. Amongst the methods to improve the bogie performance is the proposal to introduce lateral clearance in the bogies’ axleboxs. In the case of the three piece bogies...

Aerodynamic noise becomes significant for high-speed trains but its prediction in an industrial context is difficult. The flow and aerodynamic noise behaviour of a simplified high-speed train bogie at scale 1:10 are studied here through numerical simulations. The bogie is situated in the bogie cavity and cases without and with a fairing are considered, allowing the shielding effect of the bogie...

Nacrtak Many logging operators in Finland use bogie tracks and wheel chains all the year round and under all terrain conditions. The hypothesis tested here is that bogie tracks and wheel chains increase the resistance forces, and thus fuel consumption, when operating in summer conditions and on a hard-earth forest floor. Fuel consumption was measured under such conditions using the CAN bus and ...

A bogie system is the key equipment of railway vehicles. Rigorous practical evaluation of bogies is still a challenge. Presently, there is overreliance on part-specific experiments in practice. In the present work, a risk evaluation index system of a bogie system has been established based on the inspection data and experts' evaluation. Then, considering quantitative and qualitative aspects, th...

The study deals with determination of the vertical load on carrying structure a flat wagon 18–100 and Y25 bogies using mathematic modelling. was made for an empty passing over joint irregularity. authors calculated designed parameters actual features recorded during field tests. mathematical model solved in MathCad software. found that application bogie can decrease dynamic by 41.1% comparison ...

The life time predictions made with the modified HdM-method agreed rather well with experimental results for the first type of bogie beams, while the method underestimated the fatigue life for the bogie beams of the second type with a factor of up to 50. This is probably due to differences between the two types of load sequences used during the two tests in variables, such as irregularity facto...