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Identification of the mechanical subsystem of the NEES-UCSD shake table by a least-squares approach / Ozcelik, O. in Journal of engineering mechanics, Vol. 134 N°1 (Janvier 2008) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 134 N°1 (Janvier 2008) . - pp.23–34. Titre : Identification of the mechanical subsystem of the NEES-UCSD shake table by a least-squares approach Type de document : texte imprimé Auteurs : Ozcelik, O., Auteur ; J. E. Luco, Auteur ; J. P. Conte, Auteur Année de publication : 2008 Article en page(s) : pp.23–34. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Shake  table  tests  Least  squares  method  Earthquakes  Simulation. Résumé : A least-squares method is used to determine the fundamental parameters of a simple mathematical model for the mechanical subsystem of the NEES-UCSD large high performance outdoor shaking table. The parameters identified include the effective horizontal mass, the effective horizontal stiffness, and the coefficient of the classical Coulomb friction and viscous damping elements representing the various dissipative forces in the system. The values obtained for these parameters are validated by comparisons with previous results based on an alternative identification method applicable only to periodic tests and by comparisons with experimental data obtained during earthquake simulation tests and harmonic steady-state tests. The proposed identification approach works well for periodic sinusoidal and triangular tests, earthquake simulation tests, and white noise tests with table root mean square above 10% of gravity. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A1%2823 [...] [article] Identification of the mechanical subsystem of the NEES-UCSD shake table by a least-squares approach [texte imprimé] / Ozcelik, O., Auteur ; J. E. Luco, Auteur ; J. P. Conte, Auteur . - 2008 . - pp.23–34. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 134 N°1 (Janvier 2008) . - pp.23–34. Mots-clés : Shake  table  tests  Least  squares  method  Earthquakes  Simulation. Résumé : A least-squares method is used to determine the fundamental parameters of a simple mathematical model for the mechanical subsystem of the NEES-UCSD large high performance outdoor shaking table. The parameters identified include the effective horizontal mass, the effective horizontal stiffness, and the coefficient of the classical Coulomb friction and viscous damping elements representing the various dissipative forces in the system. The values obtained for these parameters are validated by comparisons with previous results based on an alternative identification method applicable only to periodic tests and by comparisons with experimental data obtained during earthquake simulation tests and harmonic steady-state tests. The proposed identification approach works well for periodic sinusoidal and triangular tests, earthquake simulation tests, and white noise tests with table root mean square above 10% of gravity. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A1%2823 [...]