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An automatic mode pairing strategy using an enhanced modal assurance citerion based on modal strain energies
- In the context of finite element model updating using output-only vibration test data, natural frequencies and mode shapes are used as validation criteria. Consequently, the correct pairing of experimentally obtained and numerically derived natural frequencies and mode shapes is important. In many cases, only limited spatial information is available and noise is present in the measurements.In the context of finite element model updating using output-only vibration test data, natural frequencies and mode shapes are used as validation criteria. Consequently, the correct pairing of experimentally obtained and numerically derived natural frequencies and mode shapes is important. In many cases, only limited spatial information is available and noise is present in the measurements. Therefore, the automatic selection of the most likely numerical mode shape corresponding to a particular experimentally identified mode shape can be a difficult task. The most common criterion for indicating corresponding mode shapes is the modal assurance criterion. Unfortunately, this criterion fails in certain cases and is not reliable for automatic approaches. In this paper, the purely mathematical modal assurance criterion will be enhanced by additional physical information from the numerical model in terms of modal strain energies. A numerical example and a benchmark study with experimental data are presented to show the advantages of the proposed energy-based criterion in comparison to the traditional modal assurance criterion.…
Dokumentart: | Artikel (Wissenschaftlicher) |
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Verfasserangaben: | Maik Brehm, Dr.-Ing. Volkmar ZabelORCiDGND, Christian BucherORCiDGND |
DOI (Zitierlink): | https://doi.org/10.1016/j.jsv.2010.07.006Zitierlink |
Titel des übergeordneten Werkes (Englisch): | Journal of Sound and Vibration |
Sprache: | Englisch |
Datum der Veröffentlichung (online): | 26.08.2017 |
Jahr der Erstveröffentlichung: | 2010 |
Datum der Freischaltung: | 26.08.2017 |
Veröffentlichende Institution: | Bauhaus-Universität Weimar |
Institute und Partnereinrichtugen: | Fakultät Bauingenieurwesen / Institut für Strukturmechanik (ISM) |
Erste Seite: | 5375 |
Letzte Seite: | 5392 |
GND-Schlagwort: | Angewandte Mathematik; Strukturmechanik |
DDC-Klassifikation: | 600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften |
500 Naturwissenschaften und Mathematik / 510 Mathematik / 519 Wahrscheinlichkeiten, angewandte Mathematik | |
BKL-Klassifikation: | 31 Mathematik / 31.80 Angewandte Mathematik |
50 Technik allgemein / 50.31 Technische Mechanik | |
Lizenz (Deutsch): | Copyright All Rights Reserved - only metadata |