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Title: Multi-physics investigations on the dynamics of differential hypoid gears
Authors: Mohammadpour, Mahdi
Theodossiades, Stephanos
Rahnejat, Homer
Keywords: Hypoid gear pair dynamics
Multi-physics multi-scale analysis
Drive train NVH
Mixed elastohydrodynamics
Issue Date: 2014
Publisher: © ASME
Citation: MOHAMMADPOUR, M., THEODOSSIADES, S. and RAHNEJAT, H., 2014. Multi-physics investigations on the dynamics of differential hypoid gears. Journal of Vibration and Acoustics, 136 (4), 041007.
Series/Report no.: ASME Paper No; VIB-13-1420
Abstract: Vehicular differential hypoid gears play an important role on the Noise, Vibration and Harshness (NVH) signature of the drive train system. Additionally, the generated friction between their mating teeth flanks under varying load-speed conditions is a source of power loss in a drive train, whilst absorbing some of the vibration energy. The paper deals with the coupling between system dynamics and analytical tribology in a multi-physics, multi-scale analysis. Elastohydrodynamic lubrication of elliptical point contact of partially conforming hypoid gear teeth pairs with non- Newtonian thermal shear of a thin lubricant film is considered, including boundary friction as the result of asperity interactions on the contiguous surfaces. Tooth Contact Analysis (TCA) has been used to obtain the input data required for such an analysis. The dynamic behaviour and frictional losses of a differential hypoid gear pair under realistic operating conditions are therefore determined. The detailed analysis shows a strong link between NVH refinement and transmission efficiency, a finding not hitherto reported in literature.
Description: This article was published in the Journal of Vibration and Acoustics [© ASME] and the definitive version is available at: http://dx.doi.org/10.1115/1.4027403
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/14291
Publisher Link: http://dx.doi.org/10.1115/1.4027403
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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