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Title: On the effect of multiple parallel nonlinear absorbers in palliation of torsional response of automotive drivetrain
Authors: Haris, Ahmed
Motato, Eliot
Mohammadpour, Mahdi
Theodossiades, Stephanos
Rahnejat, Homer
O'Mahony, M.
Vakakis, A.F.
Bergman, L.A.
McFarland, D.M.
Keywords: Automotive drivetrain
Targeted energy transfer
Nonlinear energy sink
Frequency-energy plot
Issue Date: 2017
Publisher: © Elsevier
Citation: HARIS, A. ...et al., 2017. On the effect of multiple parallel nonlinear absorbers in palliation of torsional response of automotive drivetrain. International Journal of Non-Linear Mechanics, 96, pp. 22-35.
Abstract: Torsional vibrations transmitted from the engine to the drivetrain system induce a plethora of noise, vibration and harshness (NVH) concerns such a transmission gear rattle and clutch in-cycle vibration, to name but a few. The main elements of these oscillations are variations in the inertial imbalance and the constituents of combustion power torque, collectively referred to as engine order vibration. To attenuate the effect of these transmitted vibration and their oscillatory effects in the drive train system, a host of palliative measures are employed in practice, such as clutch pre-dampers, slipping disks, dual mass flywheel and others, all of which operate effectively over a narrow band of frequencies and have various unintended repercussions. These include increased powertrain inertia, installation package space and cost. This paper presents a numerical study of the use of multiple Nonlinear Energy Sinks (NES) as a means of attenuating the torsional oscillations for an extended frequency range and under transient vehicle manoeuvres. Frequency-Energy Plots (FEP) are used to obtain the nonlinear absorber parameters for multiple NES coupled in parallel to the clutch disc of a typical drivetrain configuration. The results obtained show significant reduction in the oscillations of the transmission input shaft, effective over a broad range of response frequencies. It is also noted that the targeted reduction of the acceleration amplitude of the input shaft requires significantly lower NES inertia, compared with the existing palliative measures.
Description: This paper was published as Open Access by Elsevier under the Creative Commons Attribution (CC BY) Licence 4.0
Sponsor: This work was supported by the EPSRC via the financial support extended to the “Targeted energy transfer in powertrains to reduce vibration-induced energy losses” Grant (EP/L019426/1).
Version: Published
URI: https://dspace.lboro.ac.uk/2134/25469
Publisher Link: https://doi.org/10.1016/j.ijnonlinmec.2017.06.008
ISSN: 0020-7462
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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