Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology

This paper presents the application of response surface method in finite element model updating, as an approach for improving the accuracy and efficiency of the finite element model of a laser spot welded structure, to reflect the physical responses of the structure. The procedures of implementation...

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Published in:Journal of Physics: Conference Series
Main Author: Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
Format: Conference paper
Language:English
Published: Institute of Physics Publishing 2019
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072119384&doi=10.1088%2f1742-6596%2f1262%2f1%2f012002&partnerID=40&md5=955faeb80f4bf9ea7c755a3bbdb41a2c
id 2-s2.0-85072119384
spelling 2-s2.0-85072119384
Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
2019
Journal of Physics: Conference Series
1262
1
10.1088/1742-6596/1262/1/012002
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072119384&doi=10.1088%2f1742-6596%2f1262%2f1%2f012002&partnerID=40&md5=955faeb80f4bf9ea7c755a3bbdb41a2c
This paper presents the application of response surface method in finite element model updating, as an approach for improving the accuracy and efficiency of the finite element model of a laser spot welded structure, to reflect the physical responses of the structure. The procedures of implementation for response surface in model updating such as sampling method, selecting the significant updating parameters and constructing a quadratic polynomial response surface are discussed. Initially, the finite element model of the structure was developed using CQUAD4 shell element alongside CWELD element connectors to represent laser spot weld joints. Then, NASTRAN SOL 103 was used to calculate the dynamic behaviour of the model (natural frequencies and mode shapes). The experimental modal analysis was then conducted under free-free boundary conditions via LMS SCADAS to obtain experimental data. The minimisation of the discrepancies of the finite element model was based on objective function that was formed by the residuals between finite element and experimental natural frequencies. Results show that response surface method was efficient to be used in finite element model updating since it is capable to improve the accuracy of the finite element model. © 2019 Published under licence by IOP Publishing Ltd.
Institute of Physics Publishing
17426588
English
Conference paper
All Open Access; Gold Open Access
author Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
spellingShingle Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
author_facet Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
author_sort Shah M.A.S.A.; Yunus M.A.; Rani M.N.A.; Salleh N.; Iskandar Mirza W.I.I.W.; Peter C.
title Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
title_short Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
title_full Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
title_fullStr Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
title_full_unstemmed Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
title_sort Nondeterministic Model Updating of Laser Spot Welded Structure via Response Surface Methodology
publishDate 2019
container_title Journal of Physics: Conference Series
container_volume 1262
container_issue 1
doi_str_mv 10.1088/1742-6596/1262/1/012002
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072119384&doi=10.1088%2f1742-6596%2f1262%2f1%2f012002&partnerID=40&md5=955faeb80f4bf9ea7c755a3bbdb41a2c
description This paper presents the application of response surface method in finite element model updating, as an approach for improving the accuracy and efficiency of the finite element model of a laser spot welded structure, to reflect the physical responses of the structure. The procedures of implementation for response surface in model updating such as sampling method, selecting the significant updating parameters and constructing a quadratic polynomial response surface are discussed. Initially, the finite element model of the structure was developed using CQUAD4 shell element alongside CWELD element connectors to represent laser spot weld joints. Then, NASTRAN SOL 103 was used to calculate the dynamic behaviour of the model (natural frequencies and mode shapes). The experimental modal analysis was then conducted under free-free boundary conditions via LMS SCADAS to obtain experimental data. The minimisation of the discrepancies of the finite element model was based on objective function that was formed by the residuals between finite element and experimental natural frequencies. Results show that response surface method was efficient to be used in finite element model updating since it is capable to improve the accuracy of the finite element model. © 2019 Published under licence by IOP Publishing Ltd.
publisher Institute of Physics Publishing
issn 17426588
language English
format Conference paper
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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