Software for Operational
Modal Analysis
ARTeMIS |
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Dynamic Testing of the Braga Stadium
Suspended Roof (EURO 2004)
The results presented here were obtained by
Professors Alvaro Cunha, Elsa Caetano and Filipe Magalh�es (Laboratory of
Vibrations and Structural Monitoring of the Faculty of Engineering of the
University of Porto, Portugal), performing the analysis with ARTeMIS
Extractor Pro of the database created during the dynamic tests of the New
Braga Stadium Suspended Roof, under contract with the designer AFAssociados.
The New Braga Stadium is a masterpiece of
architecture, constructed for the European Football Championship EURO�2004,
and is located at the Northern part of Portugal. The results shown below are
based on the ambient vibration test performed using 4 triaxial GeoSIG
seismographs synchronized by GPS sensors.
Below you can download AVI movies animating the
first 10 modes. The modes have been estimated with the Frequency Domain
Decomposition estimator available in all versions of the ARTeMIS Extractor.
Hint: To get the maximum out of the downloaded AVI
movie, please set your AVI movie player to "Repeat Forever".
The Canonical Variate Analysis (CVA) Stochastic
Subspace Identification (SSI) estimator was also applied in order to extract
damping ratios of the modes. Below a typical stabilization diagram is shown:
Stabilization Diagram will be available
soon.
Related Information
Laboratory of Vibrations and Structural Monitoring
of FEUP VIBEST has their own web site at:
www.fe.up.pt/vibest. A detailed description of the test they did can be
found in the following paper:
F. Magalhäes, E. Caetano, A. Cunha
Operational Modal
Analysis of the Braga Sports Stadium Suspended Roof
Proceedings of the 24th International Modal Analysis Conference
(IMAC), St. Louis, Missouri, 2006.
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