Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures
Innovative methods for output-only estimation of the modal properties of civil structures are based on blind source separation techniques. In the present paper attention is focused on the second-order blind identification (SOBI) algorithm and the influence of its analysis parameters on computational...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/845106 |
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| author | C. Rainieri |
| author_facet | C. Rainieri |
| author_sort | C. Rainieri |
| collection | DOAJ |
| description | Innovative methods for output-only estimation of the modal properties of civil structures are based on blind source separation techniques. In the present paper attention is focused on the second-order blind identification (SOBI) algorithm and the influence of its analysis parameters on computational time and accuracy of modal parameter estimates. These represent key issues in view of the automation of the algorithm and its integration within vibration-based monitoring systems. The herein reported analyses and results provide useful hints for reduction of computational time and control of accuracy of estimates. The latter topic is of interest in the case of single modal identification tests, too. A criterion for extraction of accurate modal parameter estimates is identified and applied to selected experimental case studies. They are representative of the different levels of complexity that can be encountered during real modal tests. The obtained results point out that SOBI can provide accurate estimates and it can also be automated, confirming that it represents a profitable alternative for output-only modal analysis and vibration-based monitoring of civil structures. |
| format | Article |
| id | doaj-art-984c5e430a2745d2950792de43005cdf |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-984c5e430a2745d2950792de43005cdf2025-08-20T02:09:59ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/845106845106Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil StructuresC. Rainieri0Structural & Geotechnical Dynamics Lab “StreGa”, DiBT Department, University of Molise, Via Duca degli Abruzzi, 86039 Termoli, ItalyInnovative methods for output-only estimation of the modal properties of civil structures are based on blind source separation techniques. In the present paper attention is focused on the second-order blind identification (SOBI) algorithm and the influence of its analysis parameters on computational time and accuracy of modal parameter estimates. These represent key issues in view of the automation of the algorithm and its integration within vibration-based monitoring systems. The herein reported analyses and results provide useful hints for reduction of computational time and control of accuracy of estimates. The latter topic is of interest in the case of single modal identification tests, too. A criterion for extraction of accurate modal parameter estimates is identified and applied to selected experimental case studies. They are representative of the different levels of complexity that can be encountered during real modal tests. The obtained results point out that SOBI can provide accurate estimates and it can also be automated, confirming that it represents a profitable alternative for output-only modal analysis and vibration-based monitoring of civil structures.http://dx.doi.org/10.1155/2014/845106 |
| spellingShingle | C. Rainieri Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures Shock and Vibration |
| title | Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures |
| title_full | Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures |
| title_fullStr | Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures |
| title_full_unstemmed | Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures |
| title_short | Perspectives of Second-Order Blind Identification for Operational Modal Analysis of Civil Structures |
| title_sort | perspectives of second order blind identification for operational modal analysis of civil structures |
| url | http://dx.doi.org/10.1155/2014/845106 |
| work_keys_str_mv | AT crainieri perspectivesofsecondorderblindidentificationforoperationalmodalanalysisofcivilstructures |