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Title: Root cause identification and physics of impact-induced driveline noise in vehicular powertrain systems
Authors: Theodossiades, Stephanos
Gnanakumarr, M.
Rahnejat, Homer
Keywords: Impact-induced driveline noise
Multi-physics
Accelerative and ringing response
Issue Date: 2005
Publisher: Professional Engineering Publishing / © IMECHE
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
Abstract: 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.
Description: 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/
Version: Published
DOI: 10.1243/095440705X34937
URI: https://dspace.lboro.ac.uk/2134/4777
ISSN: 0954-4070
Appears in Collections:Published Articles (Mechanical and Manufacturing Engineering)

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