This paper investigates an NVH (Noise, Vibration and Harshness) phenomenon, which occurs as a load reversal in the presence of lashes in the driveline and is known in industry as clonk. A combined study of rigid multi-body dynamic analysis and flexible body oscillations, using super-element FEA techniques is being deployed. The results show high contribution in the driveline vibrational response of certain structural modes of the driveshaft pieces, induced by remote impacting of meshing transmission teeth trough backlash. The predicted spectrum of vibration shows good conformance with previously obtained experimental values, for both impact testing of the driveshaft pieces, as well as those obtained by vibration monitoring of experimental rigs (Vafaei et al, 2001).

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