Modal identification of output-only systems using frequency domain decomposition

作者: Rune Brincker , Lingmi Zhang , Palle Andersen

DOI: 10.1088/0964-1726/10/3/303

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摘要: In this paper a new frequency domain technique is introduced for the modal identification of output-only systems, i.e. in case where parameters must be estimated without knowing input exciting system. By its user friendliness closely related to classical approach are by simple peak picking. However, introducing decomposition spectral density function matrix, response spectra can separated into set single degree freedom each corresponding an individual mode. using close modes identified with high accuracy even strong noise contamination signals. Also, clearly indicates harmonic components

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