Numerical modelling of rubber vibration isolators

C.A.J. Beijers, Andries de Boer

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Abstract

An important cause for interior noise in vehicles is structure-borne sound from the engine. The vibrations of the source (engine) are transmitted to the receiver structure (the vehicle) causing interior noise in the vehicle. For this reason the engine is supported by rubber isolators for passive isolation in especially the high-frequency region. To make a good judgment of the characteristics of a vibration isolator in the design process, it is useful to use numerical models. In this paper a cylindrical vibration isolator is modelled numerically with the Finite Element package ABAQUS. The investigation is split in two parts: first a nonlinear analysis is performed for different pre-deformations of the mount. After that, a linear harmonic analysis is superimposed on the pre-deformed isolator. The structure-borne sound is transmitted by the isolator by six degrees of freedom, so the harmonic analysis must be performed for different excitations. With the results the behavior of the isolator can be represented by dynamic stiffness matrices as function of the frequency and predeformation. These matrices can be used to model the passive isolation components as part of numerical models of hybrid isolation systems. These isolation systems describe a combination of active and passive isolation to reduce the structure-borne sound transmission to receiver structures.
Original languageUndefined
Title of host publication10th International Conference on Sound and Vibration
EditorsA. Nilsson, H. Boden
Place of PublicationStockholm
PublisherKTH Royal Institute of Technology
Pages805-812
ISBN (Print)9780854327898
Publication statusPublished - 2003
Event10th International Congress on Sound and Vibration, ICSV 2003 - Stockholm, Sweden
Duration: 7 Jul 200310 Jul 2003
Conference number: 10

Publication series

Name
PublisherKTH

Conference

Conference10th International Congress on Sound and Vibration, ICSV 2003
Abbreviated titleICSV
CountrySweden
CityStockholm
Period7/07/0310/07/03

Keywords

  • METIS-216560
  • IR-58838

Cite this

Beijers, C. A. J., & de Boer, A. (2003). Numerical modelling of rubber vibration isolators. In A. Nilsson, & H. Boden (Eds.), 10th International Conference on Sound and Vibration (pp. 805-812). Stockholm: KTH Royal Institute of Technology.