Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy
Bayesian operational modal analysis and modal strain energy are employed for determining the damage and looseness of bolted joints in beam structures under ambient excitation. With this ambient modal identification technique, mode shapes of a damaged beam structure with loosened bolted connections a...
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Online Access: | https://doi.org/10.1177/1687814018808698 |
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doaj-cc33f2a816674dbfb0a4aaf78d326a842020-11-25T03:08:25ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402018-11-011010.1177/1687814018808698Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energyYu-Jia Hu0Wei-Gong Guo1Cheng Jiang2Yun-Lai Zhou3Weidong Zhu4School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, ChinaSchool of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong KongDepartment of Civil & Environmental Engineering, National University of Singapore, SingaporeDepartment of Mechanical Engineering, University of Maryland, Baltimore, MD, USABayesian operational modal analysis and modal strain energy are employed for determining the damage and looseness of bolted joints in beam structures under ambient excitation. With this ambient modal identification technique, mode shapes of a damaged beam structure with loosened bolted connections are obtained based on Bayesian theory. Then, the corresponding modal strain energy can be calculated based on the mode shapes. The modal strain energy of the structure with loosened bolted connections is compared with the theoretical one without bolted joints to define a damage index. This approach uses vibration-based nondestructive testing of locations and looseness of bolted joints in beam structures with different boundary conditions by first obtaining modal parameters from ambient vibration data. The damage index is then used to identify locations and looseness of bolted joints in beam structures with single or multiple bolted joints. Furthermore, the comparison between damage indexes due to different looseness levels of bolted connections demonstrates a qualitatively proportional relationship.https://doi.org/10.1177/1687814018808698 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yu-Jia Hu Wei-Gong Guo Cheng Jiang Yun-Lai Zhou Weidong Zhu |
spellingShingle |
Yu-Jia Hu Wei-Gong Guo Cheng Jiang Yun-Lai Zhou Weidong Zhu Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy Advances in Mechanical Engineering |
author_facet |
Yu-Jia Hu Wei-Gong Guo Cheng Jiang Yun-Lai Zhou Weidong Zhu |
author_sort |
Yu-Jia Hu |
title |
Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy |
title_short |
Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy |
title_full |
Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy |
title_fullStr |
Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy |
title_full_unstemmed |
Looseness localization for bolted joints using Bayesian operational modal analysis and modal strain energy |
title_sort |
looseness localization for bolted joints using bayesian operational modal analysis and modal strain energy |
publisher |
SAGE Publishing |
series |
Advances in Mechanical Engineering |
issn |
1687-8140 |
publishDate |
2018-11-01 |
description |
Bayesian operational modal analysis and modal strain energy are employed for determining the damage and looseness of bolted joints in beam structures under ambient excitation. With this ambient modal identification technique, mode shapes of a damaged beam structure with loosened bolted connections are obtained based on Bayesian theory. Then, the corresponding modal strain energy can be calculated based on the mode shapes. The modal strain energy of the structure with loosened bolted connections is compared with the theoretical one without bolted joints to define a damage index. This approach uses vibration-based nondestructive testing of locations and looseness of bolted joints in beam structures with different boundary conditions by first obtaining modal parameters from ambient vibration data. The damage index is then used to identify locations and looseness of bolted joints in beam structures with single or multiple bolted joints. Furthermore, the comparison between damage indexes due to different looseness levels of bolted connections demonstrates a qualitatively proportional relationship. |
url |
https://doi.org/10.1177/1687814018808698 |
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