Analysis of nonlinear vibration transmission through a vehicle suspension damper at low audio frequencies
Author(s)
de Brett, Matthew
Butlin, Tore
Nielsen, Ole M
Type
Journal Article
Abstract
Active control is an attractive solution to the problem of structure-borne interior road noise in cars. However, nonlinear suspension dynamics could limit the cancellation that can be achieved with a linear feedforward road noise control system. The hydraulic dampers in a vehicle suspension have previously been found to be a source of nonlinear vibration transmission at low audio frequencies. This paper presents experimental measurements and modelling of the front and rear suspension dampers in a test vehicle aimed at understanding the physical processes causing their nonlinear dynamics. Experiments are shown that highlight the different nonlinear effects present in the dampers, including friction and the mechanics of the piston valves. A suitable model was then selected from the literature, fitted to the measurements and validated. Analysis of the models revealed that, in the front damper, both friction and the valve mechanics contribute significantly to the damper’s nonlinear dynamics between 50–300 Hz. Friction in the rear damper is much less significant, meaning that its nonlinear dynamics are almost entirely caused by the piston valves. Although the front damper’s friction behaviour proved challenging to model, the effect of the piston valves was captured very accurately in both damper models.
Date Issued
2023-05-12
Date Acceptance
2023-02-14
Citation
Journal of Sound and Vibration, 2023, 551
ISSN
0022-460X
Publisher
Elsevier
Journal / Book Title
Journal of Sound and Vibration
Volume
551
Copyright Statement
Copyright © Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000990294900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
Acoustics
ACTIVE CONTROL
Damper
Engineering
Engineering, Mechanical
FRICTION
Mechanics
MODEL
Nonlinear vibration
Random vibration
Road noise
ROAD NOISE
Science & Technology
Shock absorber
Technology
Publication Status
Published
Article Number
117615
Date Publish Online
2023-02-16