The Sources of Damping in Rolling Element Bearings under Oscillating Conditions

An analysis is presented of the stiffness and damping which may be expected from a rolling element under oscillating conditions. The level of damping, which may be expected from a complete bearing plus the necessary joints, is then examined. It is shown that the assumption of no damping in the joints yields theoretical levels of damping which are substantially less than the levels measured experimentally. It is concluded that the joints are the major source of damping.