Paouris_et_al_DSTA-2015_(VIB49-abstract).pdf (91.31 kB)
A hypoid gear pair tribo-dynamic model taking into account the rheological behaviour of fully formulated gear lubricants
conference contribution
posted on 2016-02-19, 15:57 authored by Leonidas Paouris, Stephanos TheodossiadesStephanos Theodossiades, Ramin RahmaniRamin Rahmani, Homer Rahnejat, Gregory HuntA fully coupled tribo-dynamic model, capable of predicting the inefficiency
and dynamic response of automotive differential hypoid gear pairs, is presented in
this study. A gear dynamics solver is coupled with an analytical friction solver, which
calculates the viscous shear, as well as the boundary conjunctional friction force. The
time varying geometry and contact characteristics of the hypoid gear pair are taken
into account by using realistic data available in the literature. The rheological models
employed cover a range of two different behaviors: Newtonian and non-Newtonian
Eyring (shear thinning). The Chittenden-Dowson equation is used to calculate the
central film thickness of the elasto-hydrodynamic teeth conjunctions. The boundary
friction force is calculated using the Greenwood & Tripp model. Finally, the actual
surface topography of a run-in hypoid gear is obtained using a stylus profilometer.
The results indicate an overestimation of the viscous friction by the Newtonian model,
as opposed with the non-Newtonian model, mainly due to shear thinning effects.
Comparative studies are performed for different operating conditions, namely near or
away from resonance, as well as for conditions corresponding to a non-linear
sub-harmonic resonance. The frictional damping effect on the dynamic transmission
error, which is an indication of the NVH response of the gear pair, is also examine
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
13th International Conference on Dynamical Systems – Theory and Applications (DSTA-2015) http://www.dys-ta.com/volumes15_contentsCitation
PAOURIS, L.I. ...et al., 2015. A hypoid gear pair tribo-dynamic model taking into account the rheological behaviour of fully formulated gear lubricants. Presented at the 13th International Conference on Dynamical Systems – Theory and Applications (DSTA-2015), Lodz, Poland, 7-10th Dec.Publisher
© Polish Academy of SciencesVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This is a conference paper.Publisher version
Language
- en