Operational modal analisys using joint statistical analysis of multiple records

Cara Cañas, Francisco Javier; Alarcón Álvarez, Enrique y Juan Ruiz, Jesús (2013). Operational modal analisys using joint statistical analysis of multiple records. En: "11th International Conference on Recent Advances in Structural Dynamics, RASD 2012", 01/07/2013-03/07/2013, Pisa. ISBN 978-0854329649.

Descripción

Título: Operational modal analisys using joint statistical analysis of multiple records
Autor/es:
  • Cara Cañas, Francisco Javier
  • Alarcón Álvarez, Enrique
  • Juan Ruiz, Jesús
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 11th International Conference on Recent Advances in Structural Dynamics, RASD 2012
Fechas del Evento: 01/07/2013-03/07/2013
Lugar del Evento: Pisa
Título del Libro: Proceedings of the 11th International Conference on Recent Advances in Structural Dynamics
Fecha: 2013
ISBN: 978-0854329649
Materias:
Palabras Clave Informales: Operational modal analysis; Expectation-maximization algorithm; Multiple record; Analysis; State space model
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería de Organización, Administración de Empresas y Estadística
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In Operational Modal Analysis (OMA) 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 di�erent 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 di�erent 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.

Más información

ID de Registro: 26403
Identificador DC: http://oa.upm.es/26403/
Identificador OAI: oai:oa.upm.es:26403
URL Oficial: https://www.ocs.soton.ac.uk/index.php/rasdconference/RASD2013
Depositado por: Biblioteca ETSI Industriales
Depositado el: 22 May 2014 11:14
Ultima Modificación: 11 Nov 2014 15:43
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