Abstract
Operation Modal Analysis (OMA) is the testing procedure yielding experimental estimates of the modal parameters from measurements of the structural response only. Over the years OMA has evolved as an autonomous discipline and courses about this topic have been recently issued in some Italian universities.
The increasing interest for OMA is motivated by the possibility to carry out cheap and fast tests, which do not interfere with the normal use of the structure. In fact, the idea is to take advantage of naturally induced vibrations in the structure to avoid artificial input. As a consequence, the identified modal parameters are representative of the actual behavior of the structure in its operational conditions, since they refer to levels of vibration actually present in the structure.
The present review paper reports the experience gained by the Authors in giving classes about OMA for the M.Sc. Program in Civil Engineering at the University of Molise. The relevant role of practical applications is remarked. In fact, the main difficulties in approaching the study of OMA are usually related to the proper understanding of the mathematical background. Thus, a more practical approach to teaching and learning has been adopted with little penalty for theoretical derivations.
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Acknowledgments
The Authors would like to thank their students for their valuable feedback in the organization of one of the first courses about Operational Modal Analysis for undergraduate students in civil engineering in Italy. The present work was partially supported by the ReLuis-DPC Executive Project 2014–2016, RS4 Special Project “Monitoring” coordinated by Prof. G. Fabbrocino and Prof. F. Ponzo, whose contribution is also gratefully acknowledged. Opportunities provided by research carried out in the context of the Agreement Arcus—DG PaBAAC Rep. n. 113/2011 del 30/09/2011 issued by MiBac for the seismic assessment of the Carthusian monastery of Trisulti in Collepardo, and Project PON-FESR 2007–2013 (PON01_02366, STRIT) “Tools and Technologies for the Management of the Transportation Infrastructures”, coordinated by STRESS S.c.ar.l., are gratefully acknowledged. Authors are also really grateful to Prof. S. Gerbino, Chair of the M.Sc. Course in Civil Engineering at the University of Molise for his support and motivation in the development of innovative forms of education based even on the experience, out of the class, in the context of real applications. Support of administrative staff for all the issues related to the management of activities is also acknowledged.
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Rainieri, C., Fabbrocino, G. (2016). Lessons Learned from Operational Modal Analysis Courses at the University of Molise. In: De Clerck, J., Epp, D. (eds) Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-30084-9_15
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DOI: https://doi.org/10.1007/978-3-319-30084-9_15
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