Laboratory test findings on the simulation modelling of 3 piece bogie rotation friction

Simulation studies of centre bowl connections in three piece bogies had indicated that tilting loads at the centre bearing are responsible causing rim contact in the centre bowl leading to increases in the bogie rotation friction. Other effects of tilting loads interact with the bogie suspension and the warp of the bogie frames from bogie rotation friction. A full sized laboratory test was conducted to yaw one bogie on a turntable whilst twisting the entire wagon from the second bogie. The testing has confirmed the rim contact behaviour modelled in simulation and reconfirmed the importance of CCSB setups to bogie behaviour.