Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure
The monitoring and maintenance of existing civil infrastructure has recently received worldwide attention. Several structural health monitoring methods have been developed, including time-, frequency-, and time–frequency domain methods of modal identification and damage detection to estimate the str...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Infrastructures |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2412-3811/7/8/98 |
| _version_ | 1797444566223159296 |
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| author | Ali Abasi Ayan Sadhu |
| author_facet | Ali Abasi Ayan Sadhu |
| author_sort | Ali Abasi |
| collection | DOAJ |
| description | The monitoring and maintenance of existing civil infrastructure has recently received worldwide attention. Several structural health monitoring methods have been developed, including time-, frequency-, and time–frequency domain methods of modal identification and damage detection to estimate the structural and modal parameters of large-scale structures. However, there are several implementation challenges of these modal identification methods, depending on the size of the structures, measurement noise, number of available sensors, and their operational loads. In this paper, two modal identification methods, Second-Order Blind Identification (SOBI) and Time-Varying Filtering Empirical Mode Decomposition (TVF-EMD), are evaluated and compared for large-scale structures including a footbridge and a wind turbine blade with a wide range of dynamic characteristics. The results show that TVF-EMD results in better accuracy in modal identification compared to SOBI for both structures. However, when the number of sensors is equal to or more than the number of target modes of the structure, SOBI results in better computational efficiencies compared to TVF-EMD. |
| first_indexed | 2024-03-09T13:13:49Z |
| format | Article |
| id | doaj.art-4c808787fed841fea61777c89f8095e7 |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-03-09T13:13:49Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-4c808787fed841fea61777c89f8095e72023-11-30T21:38:25ZengMDPI AGInfrastructures2412-38112022-07-01789810.3390/infrastructures7080098Performance Evaluation of Blind Modal Identification in Large-Scale Civil InfrastructureAli Abasi0Ayan Sadhu1Department of Civil and Environmental Engineering, Western University, London, ON N6A 3K7, CanadaDepartment of Civil and Environmental Engineering, Western University, London, ON N6A 3K7, CanadaThe monitoring and maintenance of existing civil infrastructure has recently received worldwide attention. Several structural health monitoring methods have been developed, including time-, frequency-, and time–frequency domain methods of modal identification and damage detection to estimate the structural and modal parameters of large-scale structures. However, there are several implementation challenges of these modal identification methods, depending on the size of the structures, measurement noise, number of available sensors, and their operational loads. In this paper, two modal identification methods, Second-Order Blind Identification (SOBI) and Time-Varying Filtering Empirical Mode Decomposition (TVF-EMD), are evaluated and compared for large-scale structures including a footbridge and a wind turbine blade with a wide range of dynamic characteristics. The results show that TVF-EMD results in better accuracy in modal identification compared to SOBI for both structures. However, when the number of sensors is equal to or more than the number of target modes of the structure, SOBI results in better computational efficiencies compared to TVF-EMD.https://www.mdpi.com/2412-3811/7/8/98structural health monitoringmodal identificationSOBItime-varying filtering empirical mode decompositionEMD |
| spellingShingle | Ali Abasi Ayan Sadhu Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure Infrastructures structural health monitoring modal identification SOBI time-varying filtering empirical mode decomposition EMD |
| title | Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure |
| title_full | Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure |
| title_fullStr | Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure |
| title_full_unstemmed | Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure |
| title_short | Performance Evaluation of Blind Modal Identification in Large-Scale Civil Infrastructure |
| title_sort | performance evaluation of blind modal identification in large scale civil infrastructure |
| topic | structural health monitoring modal identification SOBI time-varying filtering empirical mode decomposition EMD |
| url | https://www.mdpi.com/2412-3811/7/8/98 |
| work_keys_str_mv | AT aliabasi performanceevaluationofblindmodalidentificationinlargescalecivilinfrastructure AT ayansadhu performanceevaluationofblindmodalidentificationinlargescalecivilinfrastructure |