Abstract
M.Ing.
This report documents the steps taken to gain insight into the dynamics of a
HS MkVII self-steering three piece bogie. This was done by firstly studying the
dynamics and stability of linear simplifications of the bogie and wagon and
then by investigating the dynamics of the bogie by means of a non-linear
model.With the necessary insight into the dynamics of the bogie, an optimised
relationship between the primary suspension stiffness and the centre plate
friction of a self-steering three-piece bogie was achieved. The optimised
model’s wear is less than half that of the reference model and has a safe
operating speed of 80km/h for an empty wagon and 140 km/h for a loaded
wagon.
It is recommended that the following be done before issuing a final technical
recommendation;
• A final optimisation of the lateral and longitudinal primary suspension
stiffness arrangement; taking into consideration the physical vertical load
bearing capacity of the rubber suspension elements.
• A study in order to quantify the effects, on wear, of the increased
misaligned position of the bogie on straight track following a curve.
A verification of the ADAMS/Rail simulation results by conducting specific
on-track tests.
• A comprehensive cost-benefit analysis.