Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Operational modal analysis using joint statistical analysis of multiple records
Year:2013
Research Areas
  • Statistics,
  • Engineering
Information
Abstract
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.
International
Si
Congress
11th International Conference on Recent Advances in Structural Dynamics
960
Place
Pisa, Italia
Reviewers
Si
ISBN/ISSN
9780854329649
Start Date
01/07/2013
End Date
03/07/2013
From page
120
To page
132
Proceedings of the 11th International Conference on Recent Advances in Structural Dynamics
Participants
  • Autor: Francisco Javier Cara Cañas (UPM)
  • Autor: Enrique Alarcon Alvarez (UPM)
  • Autor: Jesus Juan Ruiz (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería Sísmica: Dinámica de Suelos y Estructuras
  • Grupo de Investigación: Estadística computacional y Modelado estocástico
  • Departamento: Ingeniería de Organización, Administración de Empresas y Estadística
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)