Some interactions between the dynamic and tribological behaviour of geared transmissions are examined, and a number of\r\nexperimental and simulation results are compared. A model is introduced which incorporates most of the possible interactions\r\nbetween gears, shafts and hydrodynamic journal bearings. It combines (i) a specific element for wide-faced gears that includes\r\nthe normal contact conditions between actual mating teeth, that is, with tooth shape deviations and mounting errors, (ii) shaft\r\nfinite elements, and (iii) the external forces generated by journal bearings determined by directly solving Reynolds� equation. The\r\nsimulation results are compared with the measurement obtained on a high-precision test rig with single-stage spur and helical\r\ngears supported by hydrodynamic journal bearings. The experimental and simulation results compare well thus validating the\r\nsimulation strategy both at the global and local scales.
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