The University of Southampton
University of Southampton Institutional Repository

Vibration analysis of uncertain spot-welded structures: experimental validation

Vibration analysis of uncertain spot-welded structures: experimental validation
Vibration analysis of uncertain spot-welded structures: experimental validation
There are inevitable uncertainties in the properties of spot-welded structures due to variability in the positions and diameters of the spot welds. This produces uncertainty in the vibrational response. Ideally the analyst would like to predict this variability, but this raises the challenges of efficient computation of response statistics as well as practical quantification of the input uncertainty. This paper presents an experimental validation of a numerically efficient approach to the prediction of vibration response statistics, which involves a multi-point constraint spot weld model, component mode synthesis with characteristic constraint modes and a low-rank update theory; the method is described elsewhere. Measurements were taken on 108 single-hat profiles, subsequently joined in pairs by four spot welds to produce 54 double-hat profiles. The spot weld diameters and positions were measured. These are then used as input data for the finite element model. Measurements of natural frequencies, frequency responses, loss factors and mode shapes were taken. Spot weld location and diameter and the natural frequencies are seen to be well modelled by normal distributions, with some modes being strongly correlated. Agreement between the numerical predictions and measured results for the natural frequency statistics and the frequency responses are seen to agree well
De Alba, R.O.
9e42a69e-9f6a-4806-b302-1ceb53421784
Ferguson, N.S.
8cb67e30-48e2-491c-9390-d444fa786ac8
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
De Alba, R.O.
9e42a69e-9f6a-4806-b302-1ceb53421784
Ferguson, N.S.
8cb67e30-48e2-491c-9390-d444fa786ac8
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe

De Alba, R.O., Ferguson, N.S. and Mace, B.R. (2014) Vibration analysis of uncertain spot-welded structures: experimental validation. ICDVC-2014, the 4th International Conference on Dynamics, Vibration and Control, China. 23 Aug 2014 - 25 Aug 2015 .

Record type: Conference or Workshop Item (Paper)

Abstract

There are inevitable uncertainties in the properties of spot-welded structures due to variability in the positions and diameters of the spot welds. This produces uncertainty in the vibrational response. Ideally the analyst would like to predict this variability, but this raises the challenges of efficient computation of response statistics as well as practical quantification of the input uncertainty. This paper presents an experimental validation of a numerically efficient approach to the prediction of vibration response statistics, which involves a multi-point constraint spot weld model, component mode synthesis with characteristic constraint modes and a low-rank update theory; the method is described elsewhere. Measurements were taken on 108 single-hat profiles, subsequently joined in pairs by four spot welds to produce 54 double-hat profiles. The spot weld diameters and positions were measured. These are then used as input data for the finite element model. Measurements of natural frequencies, frequency responses, loss factors and mode shapes were taken. Spot weld location and diameter and the natural frequencies are seen to be well modelled by normal distributions, with some modes being strongly correlated. Agreement between the numerical predictions and measured results for the natural frequency statistics and the frequency responses are seen to agree well

PDF
__soton.ac.uk_ude_PersonalFiles_Users_nsf1_mydocuments_WORKING DOCUMENTS_MyDocs_Ricardo (PhD)_Papers etc_china conference 2014_ICDVC Mace 14.pdf - Other
Restricted to Registered users only
Download (2MB)
Request a copy

More information

Published date: 23 August 2014
Venue - Dates: ICDVC-2014, the 4th International Conference on Dynamics, Vibration and Control, China, 2014-08-23 - 2015-08-25
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 368302
URI: https://eprints.soton.ac.uk/id/eprint/368302
PURE UUID: d4a45e35-a6d9-402f-b149-38a8fc66400a
ORCID for N.S. Ferguson: ORCID iD orcid.org/0000-0001-5955-7477
ORCID for B.R. Mace: ORCID iD orcid.org/0000-0003-3312-4918

Catalogue record

Date deposited: 04 Sep 2014 08:31
Last modified: 16 Jul 2019 00:58

Export record

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 https://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.

×