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Descripción
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| In Operational Modal Analysis of a structure, the data acquisition process may be repeated many times. In these cases, the analyst has several similar records for the modal analysis of the structure that have been obtained at different time instants (multiple records). The solution obtained varies from one record to another, sometimes considerably. The differences are due to several reasons: statistical errors of estimation, changes in the external forces (unmeasured forces) that modify the output spectra, appearance of spurious modes, etc. Combining the results of the different individual analysis is not straightforward. To solve the problem, we propose to make the joint estimation of the parameters using all the records. This can be done in a very simple way using state space models and computing the estimates by maximum-likelihood. The method provides a single result for the modal parameters that combines optimally all the records. | |
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Internacional
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Si |
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Nombre congreso
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11th International Conference on Recent Advances in Structural Dynamics |
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Tipo de participación
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960 |
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Lugar del congreso
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Pisa, Italia |
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Revisores
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Si |
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ISBN o ISSN
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9780854329649 |
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DOI
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Fecha inicio congreso
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01/07/2013 |
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Fecha fin congreso
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03/07/2013 |
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Desde la página
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120 |
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Hasta la página
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132 |
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Título de las actas
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Proceedings of the 11th International Conference on Recent Advances in Structural Dynamics |