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Root cause identification and physics of impact-induced driveline noise in vehicular powertrain systems

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journal contribution
posted on 03.06.2009, 12:28 by Stephanos Theodossiades, M. Gnanakumarr, Homer Rahnejat
Numerical and experimental investigations shed light on the root causes leading to the emergence and persistence of an acute metallic noise in rear wheel drive light truck drivelines. Sudden demands in engine output torque combined with the presence of lash zones give rise to a phenomenon that is onomatopoeically referred to as clonk. Its multi physics nature requires a comprehensive study, which includes rigid multi-body dynamics, flexible body oscillations, and noise radiation computation. The verification of numerical results is achieved through the design and implementation of a transient dynamic experimental rig, which comprises the complete drivetrain from the engine flywheel to the rear axle. Parametric studies reveal high-frequency contributions in the driveline vibration response of certain structural modes of the driveshaft pieces, which are induced by remote impact of meshing transmission teeth through backlash. The numerically predicted spectrum of vibration is in good qualitative agreement with the experimental measurements. Combined study of the aforementioned results reveals the components that amplify the clonk noise.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

THEODOSSIADES, S., GNANAKUMARR, M. and RAHNEJAT, H., 2005. Root cause identification and physics of impact-induced driveline noise in vehicular powertrain systems. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 219 (11), pp. 1303-1319

Publisher

Professional Engineering Publishing / © IMECHE

Version

VoR (Version of Record)

Publication date

2005

Notes

This article was published in the Journal, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering [© IMECHE]. The definitive version is available at: http://www.pepublishing.com/

ISSN

0954-4070

Language

en