15 Lessons Learned from Operational Modal Analysis Courses at the University of Molise 165 Fig. 15.2 Recurrent sensor layout for building-like structures (a) and bridge spans (b) Fig. 15.3 Students involved in the application of OMA to a real bridge [7] The course ends with an overview of the different OMA methods, their classification and comparative analysis. The theoretical basis of the most popular methods is briefly presented, inviting the students interested in more details to refer to the textbook and the scientific literature. An extensive analysis of the theoretical background of all OMA methods is, in fact, impossible due to the limited amount of hours of lesson. Nevertheless, popular OMA methods, such as the Stochastic Subspace Identification method and the (polyreference) Least Squares Complex Frequency method [2], are presented from an applicative point of view, based on the software included in the textbook [2]. Tools for validation and post-processing of modal identification results are finally presented, together with a number of case studies derived from our research experience. Most of them are also reported in the fifth chapter of the textbook [2].
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