Study of nonlinear effects in a bolted joint using the base excitation as an input
In this paper, the nonlinearity detection, characterization and identification of a bolted beam assembly is presented. The methodology utilized in this work is based on the force reconstruction using the base excitation as an input and the nonlinear system identification. The force reconstruction pr...
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doaj-b2b1f5736f37418b8b6bdce7dbf0f3c62021-08-17T04:14:50ZengJVE InternationalJournal of Vibroengineering1392-87162538-84602021-05-012351109112810.21595/jve.2021.2184921849Study of nonlinear effects in a bolted joint using the base excitation as an inputSushil Doranga0Christine Wu1Department of Mechanical Engineering, Lamar University, Beaumont, Texas, 77710, USADepartment of Mechanical Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, CanadaIn this paper, the nonlinearity detection, characterization and identification of a bolted beam assembly is presented. The methodology utilized in this work is based on the force reconstruction using the base excitation as an input and the nonlinear system identification. The force reconstruction procedure was carried out by exciting the bolted beam assembly at very low excitation with fully tightened bolt condition. The nonlinear effect in the bolted beam assembly was induced by reducing the bolt clamping loads. A collection of frequency response functions (FRFs) are shown at different clamping loads to detect and characterize the nonlinearities. Once the nonlinearities are detected and characterized, the restoring force surface method using the reconstructed force was used to identify the nonlinear parameters in the modal space. Four different base excitation (energy) levels with three different tightening torques were considered in the tests in order to study the energy dependence of the damping nonlinearities. In all the cases, the nonlinear system identification methodology employed was successful in identifying the damping and stiffness nonlinearities.https://www.jvejournals.com/article/21849nonlinearbase excitationmodal analysisforce reconstruction |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sushil Doranga Christine Wu |
spellingShingle |
Sushil Doranga Christine Wu Study of nonlinear effects in a bolted joint using the base excitation as an input Journal of Vibroengineering nonlinear base excitation modal analysis force reconstruction |
author_facet |
Sushil Doranga Christine Wu |
author_sort |
Sushil Doranga |
title |
Study of nonlinear effects in a bolted joint using the base excitation as an input |
title_short |
Study of nonlinear effects in a bolted joint using the base excitation as an input |
title_full |
Study of nonlinear effects in a bolted joint using the base excitation as an input |
title_fullStr |
Study of nonlinear effects in a bolted joint using the base excitation as an input |
title_full_unstemmed |
Study of nonlinear effects in a bolted joint using the base excitation as an input |
title_sort |
study of nonlinear effects in a bolted joint using the base excitation as an input |
publisher |
JVE International |
series |
Journal of Vibroengineering |
issn |
1392-8716 2538-8460 |
publishDate |
2021-05-01 |
description |
In this paper, the nonlinearity detection, characterization and identification of a bolted beam assembly is presented. The methodology utilized in this work is based on the force reconstruction using the base excitation as an input and the nonlinear system identification. The force reconstruction procedure was carried out by exciting the bolted beam assembly at very low excitation with fully tightened bolt condition. The nonlinear effect in the bolted beam assembly was induced by reducing the bolt clamping loads. A collection of frequency response functions (FRFs) are shown at different clamping loads to detect and characterize the nonlinearities. Once the nonlinearities are detected and characterized, the restoring force surface method using the reconstructed force was used to identify the nonlinear parameters in the modal space. Four different base excitation (energy) levels with three different tightening torques were considered in the tests in order to study the energy dependence of the damping nonlinearities. In all the cases, the nonlinear system identification methodology employed was successful in identifying the damping and stiffness nonlinearities. |
topic |
nonlinear base excitation modal analysis force reconstruction |
url |
https://www.jvejournals.com/article/21849 |
work_keys_str_mv |
AT sushildoranga studyofnonlineareffectsinaboltedjointusingthebaseexcitationasaninput AT christinewu studyofnonlineareffectsinaboltedjointusingthebaseexcitationasaninput |
_version_ |
1721205568908034048 |