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A vibro-acoustic reduced order model using undeformed coupling interface substructuring - Application to rubber bushing isolation in vehicle suspension systems
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0003-1855-5437
2014 (English)In: Applied Acoustics, ISSN 0003-682x, Vol. 78, 43-50 p.Article in journal (Refereed) Published
Abstract [en]

A vibro-acoustic reduced order model (ROM) based on a substructuring method using undeformed coupling interfaces (UCI) is proposed. The method may be used to reduce the order of a global problem, this by subdividing the global system to substructures interacting through UCI's. The local dynamic stiffness of each substructure may then be modelled with a, for that particular problem, best suited description. The feasibility of the method is demonstrated by a sensitivity analysis of the vibro-acoustic power isolation in a vehicle suspension system, comprising of a link arm connected to a vehicle car body through two rubber bushings. The link arm ROM is a component mode synthesis (CMS)-UCI, the rubber bushing model is a UCI-ROM derived from a 2D axisymmetric model using a frequency dependent visco-elastic material model. Finally the car body model is a frequency dependent UCI-ROM from a full car body finite element model. It is shown that the UCI-ROM approach efficiently can be used for parametric studies on a substructure level. The results suggest that the performed reorientation of the rubber bushings can alter, with orders of magnitude, the energy flow into the car.

Place, publisher, year, edition, pages
2014. Vol. 78, 43-50 p.
Keyword [en]
Dynamic substructuring, Reduced order modelling, Undeformed coupling interfaces, Rubber bushings, Vibro-acoustic power isolation, Vehicle suspension system
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-121571DOI: 10.1016/j.apacoust.2013.11.001ISI: 000331926000007Scopus ID: 2-s2.0-84889026635OAI: oai:DiVA.org:kth-121571DiVA: diva2:619125
Note

QC 20140327. Updated from manuscript to article in journal.

Available from: 2013-05-02 Created: 2013-05-02 Last updated: 2017-12-06Bibliographically approved
In thesis
1. A Vibro-Acoustic Study of Vehicle Suspension Systems: Experimental and Mathematical Component Approaches
Open this publication in new window or tab >>A Vibro-Acoustic Study of Vehicle Suspension Systems: Experimental and Mathematical Component Approaches
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The objective of the present work is to study the vehicle suspension as a vibro-acoustic system of high complexity, consisting of many sub-systems with fundamentally different acoustical properties. In a parallel numerical and experimental modelling effort, important contributions to the understanding of its behaviour have been achieved. These findings are based on a balance between component investigations and global modelling of the complete system; they have been formulated for the transmission of both tyre-road excitation and friction-induced vibrations in the brake system.

Initially an experimental study was conducted on a full vehicle test rig studying the broadband interior brake noise problem of, here named, roughness noise. The purpose of the study was twofold: first, to determine if the transmission from the source to the interior of the vehicle was structure-borne; second, to study the complexity of the suspension as a vibro-acoustic system. Parameters a_ecting the vibro-acoustic source were varied to gain understanding of the source mechanisms. This experimental study laid the foundation of the first part of this thesis (paper A) and provided the directions for the second part, the development of a mathematical modelling approach (paper B and C). In these two papers, methods for analysing the complex vibro-acoustic transfer of structure-borne sound in a vehicle suspension system were developed. The last part was then focussed on the wheel rim influence on the vibro-acoustic behaviour (paper D) of the suspension system. As a whole, the work clearly demonstrates that it is possible to conduct component studies of subsystems in the vehicle suspension system; and from these component studies it is possible draw conclusions that very well may avoid severe degradations in the interior noise of future vehicle generations.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. x, 61 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2013:17
Keyword
Acoustics, Vehicle suspension, Disc brake, Wheel rim Roughness noise, Interior tyre-road noise Component mode synthesis, Undeformed coupling interface
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-121575 (URN)978-91-7501-732-7 (ISBN)
Public defence
2013-05-22, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:15 (English)
Opponent
Supervisors
Note

QC 20130503

Available from: 2013-05-03 Created: 2013-05-02 Last updated: 2013-05-03Bibliographically approved

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Göransson, Peter

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