Abstract
An experimental and numerical study was developed to investigate the influence of radial load and the amplitude of rotational and lateral vibrations on false brinelling damage in railway cylindrical roller bearings. For this objective, a novel false brinelling test-rig was designed and fabricated to conduct both linear vibration and rotational displacement tests. A reciprocating pin-on-cylinder wear test was also conducted to determine the friction and wear coefficients of the bearing, under different frequencies. These experimental results where then used to verify a developed finite element model for false brinelling of an individual roller.
The reciprocating wear test results show that the friction coefficient is almost constant and does not significantly, change, by changing the frequency. The wear coefficient, however, can be estimated by an exponential function of the frequency. The experimental and numerical results showed that reducing the bearing static radial load and increasing the amplitude of linear and rotational vibration, intensifies the false brinelling damage. It was also shown that by increasing the bearing radial load, the false brinelling wear profile changes from a U-shape to W-shape.