The University of Southampton
University of Southampton Institutional Repository

Prediction of response variability in uncertain point connected structures using component mode synthesis and characteristic constraint modes

Prediction of response variability in uncertain point connected structures using component mode synthesis and characteristic constraint modes
Prediction of response variability in uncertain point connected structures using component mode synthesis and characteristic constraint modes
Finite element analysis is frequently used in conjunction with Monte Carlo simulations (MCS) to predict the variability in the vibration response of assembled structures with uncertainties in the joint properties. Nonetheless this is usually computationally expensive, especially for large scale models. In this paper, component mode synthesis (CMS) is applied to point connected structures in order to reduce the size of the model. In addition, in order to spatially locate the connections anywhere in the model multipoint constraints are used. However, if the number of degrees of freedom (DOFs) involved in the connection is large, then the CMS size reduction is less effective. Characteristic constraint modes can then be used to reduce the number of interface DOFs.

The application of the technique is demonstrated on a model of two simply supported plates with five point connections. A MCS is used to evaluate the variability in the vibration response of this system due to uncertainty in the location of the point connections. Results show that this procedure not only reduces the computational time by approximately 90%, but also maintains good accuracy in the estimation of responses when compared to the standard modal solution.
finite element analysis, uncertainty in joints, multipoint constraints
0854329102
12pp
University of Southampton
De Alba, R.O.
9e42a69e-9f6a-4806-b302-1ceb53421784
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Ferguson, N.S.
8cb67e30-48e2-491c-9390-d444fa786ac8
Brennan, M.J.
Kovacic, Ivana
Lopes, V.
Murphy, K.
Petersson, B.
Rizzi, S.
Yang, T.
De Alba, R.O.
9e42a69e-9f6a-4806-b302-1ceb53421784
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Ferguson, N.S.
8cb67e30-48e2-491c-9390-d444fa786ac8
Brennan, M.J.
Kovacic, Ivana
Lopes, V.
Murphy, K.
Petersson, B.
Rizzi, S.
Yang, T.

De Alba, R.O., Mace, B.R. and Ferguson, N.S. (2010) Prediction of response variability in uncertain point connected structures using component mode synthesis and characteristic constraint modes. Brennan, M.J., Kovacic, Ivana, Lopes, V., Murphy, K., Petersson, B., Rizzi, S. and Yang, T. (eds.) In Recent Advances Structural Dynamics: Proceedings of the X International Conference. University of Southampton. 12pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Finite element analysis is frequently used in conjunction with Monte Carlo simulations (MCS) to predict the variability in the vibration response of assembled structures with uncertainties in the joint properties. Nonetheless this is usually computationally expensive, especially for large scale models. In this paper, component mode synthesis (CMS) is applied to point connected structures in order to reduce the size of the model. In addition, in order to spatially locate the connections anywhere in the model multipoint constraints are used. However, if the number of degrees of freedom (DOFs) involved in the connection is large, then the CMS size reduction is less effective. Characteristic constraint modes can then be used to reduce the number of interface DOFs.

The application of the technique is demonstrated on a model of two simply supported plates with five point connections. A MCS is used to evaluate the variability in the vibration response of this system due to uncertainty in the location of the point connections. Results show that this procedure not only reduces the computational time by approximately 90%, but also maintains good accuracy in the estimation of responses when compared to the standard modal solution.

This record has no associated files available for download.

More information

Published date: July 2010
Additional Information: Paper No.056 (Format - USB Pen Drive)
Keywords: finite element analysis, uncertainty in joints, multipoint constraints

Identifiers

Local EPrints ID: 160693
URI: http://eprints.soton.ac.uk/id/eprint/160693
ISBN: 0854329102
PURE UUID: c75548c1-0c4f-4543-9ed4-daea8da81787
ORCID for B.R. Mace: ORCID iD orcid.org/0000-0003-3312-4918
ORCID for N.S. Ferguson: ORCID iD orcid.org/0000-0001-5955-7477

Catalogue record

Date deposited: 20 Jul 2010 14:28
Last modified: 10 Jan 2023 02:32

Export record

Contributors

Author: R.O. De Alba
Author: B.R. Mace ORCID iD
Author: N.S. Ferguson ORCID iD
Editor: M.J. Brennan
Editor: Ivana Kovacic
Editor: V. Lopes
Editor: K. Murphy
Editor: B. Petersson
Editor: S. Rizzi
Editor: T. Yang

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×