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Reduced order modelling of elastomeric vibration isolators in dynamic substructuring

Flodén, O. LU ; Sandberg, G. LU and Persson, K. LU (2018) In Engineering Structures 155. p.102-114
Abstract

Dynamic substructuring is often employed to reduce the size of numerical models for structural dynamic analysis. In this paper, we discuss how elastomeric vibration isolators can be modelled within the framework of dynamic substructuring in order to obtain accurate and efficient reduced order models. For several reasons, it is beneficial to divide a structure containing elastomeric isolators into substructures at the interfaces between elastomers and surrounding parts of the structure. Therefore, we consider the elastomeric isolators as reduced coupling elements in the connections of substructure models. The coupling elements are established by reducing the number of degrees of freedom of 3D finite element models of elastomers. The main... (More)

Dynamic substructuring is often employed to reduce the size of numerical models for structural dynamic analysis. In this paper, we discuss how elastomeric vibration isolators can be modelled within the framework of dynamic substructuring in order to obtain accurate and efficient reduced order models. For several reasons, it is beneficial to divide a structure containing elastomeric isolators into substructures at the interfaces between elastomers and surrounding parts of the structure. Therefore, we consider the elastomeric isolators as reduced coupling elements in the connections of substructure models. The coupling elements are established by reducing the number of degrees of freedom of 3D finite element models of elastomers. The main purpose of the studies presented in the paper is to evaluate the performance of different reduction method when applied to elastomer models. In addition, the effects of modelling features such as rotational coupling and frequency-dependent material properties of elastomeric isolators are investigated. A model of a wooden building structure with elastomeric isolators is used as an example case, considering steady-state dynamic analysis in the low-frequency range. The results and discussions presented in the paper provide guidance for reduced order modelling of elastomeric isolators in dynamic substructuring.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamic substructuring, Elastomers, Finite element method, Interface reduction, Model order reduction, Vibration isolation
in
Engineering Structures
volume
155
pages
13 pages
publisher
Elsevier
external identifiers
  • scopus:85033685804
ISSN
0141-0296
DOI
language
English
LU publication?
yes
id
930359cb-190d-46d0-a12d-eb3f22d1c0f6
date added to LUP
2017-11-24 07:37:21
date last changed
2018-05-29 10:14:05
@article{930359cb-190d-46d0-a12d-eb3f22d1c0f6,
  abstract     = {<p>Dynamic substructuring is often employed to reduce the size of numerical models for structural dynamic analysis. In this paper, we discuss how elastomeric vibration isolators can be modelled within the framework of dynamic substructuring in order to obtain accurate and efficient reduced order models. For several reasons, it is beneficial to divide a structure containing elastomeric isolators into substructures at the interfaces between elastomers and surrounding parts of the structure. Therefore, we consider the elastomeric isolators as reduced coupling elements in the connections of substructure models. The coupling elements are established by reducing the number of degrees of freedom of 3D finite element models of elastomers. The main purpose of the studies presented in the paper is to evaluate the performance of different reduction method when applied to elastomer models. In addition, the effects of modelling features such as rotational coupling and frequency-dependent material properties of elastomeric isolators are investigated. A model of a wooden building structure with elastomeric isolators is used as an example case, considering steady-state dynamic analysis in the low-frequency range. The results and discussions presented in the paper provide guidance for reduced order modelling of elastomeric isolators in dynamic substructuring.</p>},
  author       = {Flodén, O. and Sandberg, G. and Persson, K.},
  issn         = {0141-0296},
  keyword      = {Dynamic substructuring,Elastomers,Finite element method,Interface reduction,Model order reduction,Vibration isolation},
  language     = {eng},
  month        = {01},
  pages        = {102--114},
  publisher    = {Elsevier},
  series       = {Engineering Structures},
  title        = {Reduced order modelling of elastomeric vibration isolators in dynamic substructuring},
  url          = {http://dx.doi.org/},
  volume       = {155},
  year         = {2018},
}