posted on 2015-03-09, 15:15authored byMahdi Mohammadpour, P.M. Johns-Rahnejat, Homer Rahnejat
The paper describes a combined tribodynamics analysis (dynamics and contact tribology) of cylindrical roller bearings of
a heavy duty truck transmission under high applied loads. The dynamic analysis provides the transient variations in
contact load. It also determines the vibration spectrum of the bearing as well as that of contact dynamics. It is shown that
with sufficient preloading and/or interference fitting a widely spread loaded region results, which reduces bearinginduced
vibration. The transient tribological analysis, including thermal analysis with a novel and realistic lubricant
inlet boundary condition demonstrates that non-Newtonian mixed elastohydrodynamic regime of lubrication is prevalent,
but with reduced friction compared with unrealistic dry Coulombic friction, which is often assumed in literature.
Funding
The authors wish to acknowledge the support of Wolfson
School’s PhD Scholarship Scheme.
History
School
Mechanical, Electrical and Manufacturing Engineering
Published in
Part K: Journal of Multi-body Dynamics
Citation
MOHAMMADPOUR, M., JOHNS-RAHNEJAT, P.M. and RAHNEJAT, H., 2015. Roller bearing dynamics under transient thermal-mixed non-Newtonian elastohydrodynamic regime of lubrication. Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, forthcoming.
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