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- W2897459077 abstract "Summary In this paper, an extension of modal analysis in linear computational structural dynamics is presented to deal with complex structures characterized by the presence of numerous local vibration modes and for which the high modal density leads to high‐dimension reduced‐order models. These local modes consist of isolated vibrations that are dissociated from the global vibrations of the structure skeleton and that turn out to often be of negligible contribution to the global dynamics. Therefore, an automatic mode sorting procedure is proposed to extract the dominant modes that represent the global dynamics of the skeleton. Next, an alternative filtering methodology based on a modified eigenvalue problem is presented, which allows to build, a priori, a small‐dimension reduced‐order basis of dominant global modes. The two methods are compared to classic modal analysis using three applications, namely, a heterogeneous plate, a simplified nuclear fuel assembly, and a detailed boiling water reactor fuel assembly." @default.
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- W2897459077 date "2018-11-18" @default.
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- W2897459077 title "Dominant vibration modes for broadband frequency analysis of multiscale structures with numerous local vibration modes" @default.
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- W2897459077 doi "https://doi.org/10.1002/nme.5971" @default.
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