Simulation of a freight wagon bogie in double roller test rig

Test benches are useful tools for testing bogies in laboratory conditions, most of which consist of large rollers to move the wheels of the bogies, either at a reduced scale or at full size. The full-scale test rig located at the BOGLAB laboratory uses two small rollers to move each wheel of one of the bogie's wheelsets. This paper presents a 21-DOF dynamic model of a two-axle bogie running on this double roller test rig that considers the motion of the two wheelsets, the bogie frame and the four axle boxes, which is not usually implemented in the models of the literature. The model also computes the creepages, creep and normal forces originating from the contact of the two rollers on each wheel. The simulation results show the movement transmission from the front wheelset to the rear wheelset due to the specific configuration of this test bench. A sensitivity analysis is performed to study the influence of bogie load and speed on the vertical acceleration of the axle boxes. Data show that increasing the bogie load leads to higher vertical acceleration in the axleboxes. The effect of speed is nonlinear, revealing a threshold speed beyond which vertical accelerations significantly decrease.

Simulation of a freight wagon bogie in double roller test rig Articles