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Design and validation of a nonlinear vibration absorber to attenuate torsional oscillations of propulsion systems

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journal contribution
posted on 10.01.2020, 09:58 authored by A Haris, Panagiotis Alevras, Mahdi Mohammad-PourMahdi Mohammad-Pour, Stephanos TheodossiadesStephanos Theodossiades, M O’ Mahony
Recent developments in propulsion systems to improve energy efficiency and reduce hazardous emissions often lead to severe torsional oscillations and aggravated noise. Vibration absorbers are typically employed to palliate the untoward effects of powertrain oscillations, with nonetheless an adverse impact on cost and constrained efficacy over a limited frequency range. Recently, the authors proposed the use of nonlinear vibration absorbers to achieve more broadband drivetrain vibration attenuation with low complexity and cost. These lightweight attachments follow the concept of targeted energy transfer, whereby vibration energy is taken off from a primary system without tuning requirements. In this paper, the design and experimental investigation of a prototype absorber is presented. The absorber is installed on a drivetrain experimental rig driven by an electric motor through a universal joint connection placed at an angle, thus inducing second order torsional oscillations. Vibration time histories with and without the absorber acting are recorded and compared. Frequency-energy plots are superimposed to the system nonlinear normal modes to verify the previously developed design methodology, whereas the achieved vibration reduction is quantified by comparing the acceleration amplitudes of the primary system and monitoring the distribution of energy damped in the primary system and the absorber. The absorber prototype was found to lead to significant vibration reduction away from resonance and near resonance with the additional feature of activation over a relatively broad frequency range.

Funding

Engineering and Physical Sciences Research Council (EPSRC) “Targeted energy (a) (b) 20 transfer in powertrains to reduce vibration-induced energy losses” [Grant number EP/L019426/1] and Enterprise Projects Group (EPG) No. 102

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Nonlinear Dynamics

Volume

100

Pages

33-49

Publisher

Springer Verlag

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Acceptance date

21/01/2020

Publication date

2020-02-05

Copyright date

2020

ISSN

0924-090X

eISSN

1573-269X

Language

en

Depositor

Prof Stephanos Theodossiades. Deposit date: 8 January 2020