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A nonlinear energy sink design to attenuate the torsional oscillations of lightly loaded gear pairs

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posted on 2022-07-12, 15:03 authored by Brett Friskney, Panagiotis Alevras, Sourabh Londhe, Stephanos TheodossiadesStephanos Theodossiades, Donald Michael McFarland
Nonlinear energy sinks (NES) have recently attracted significant interest for the suppression of unwanted vibrations in a variety of mechanical systems. The key advantage in employing this (vibration absorber) approach is the broadband nature of the interactions with a primary system for which vibration energy dissipation is required. Thus, the effectiveness of the NES is decoupled from the need of tuning to specific frequencies. Nevertheless, NES for rotational fluctuations of powertrains have received limited attention in the literature. In this work, a design for a rotational NES to mitigate speed fluctuations in gear trains is presented and tested experimentally. The development of the proposed system is underpinned by previous optimisation studies conducted by the authors, where a disk was utilised as an inerter NES. A set of beams couple the inerter with the wheel gear of a spur gear pair with a nonlinear restoring torque, which is designed to approach the desired essential nonlinearity within realistic practical tolerances. Static and dynamic identification is conducted to confirm the desired characteristics. Despite uncertainties in the prototype testing, the approach is found to reduce the speed fluctuations on the gear pair output shaft, with appropriate predictability established for the model and the design procedure.

Funding

Targeted energy transfer in powertrains to reduce vibration-induced energy losses

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Applied Sciences

Volume

12

Issue

13

Publisher

MDPI

Version

  • VoR (Version of Record)

Rights holder

© The Author(s)

Publisher statement

This article is an Open Access article published in Applied Sciences and distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

Acceptance date

2022-06-29

Publication date

2022-07-04

Copyright date

2022

eISSN

2076-3417

Language

  • en

Depositor

Prof Stephanos Theodossiades. Deposit date: 12 July 2022

Article number

6778

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