A Procedure to Identify the Modal and Physical Parameters of a Classically Damped System under Seismic Motions
Joint Authors
Source
Advances in Acoustics and Vibration
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-02
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The purpose of this paper is to discuss a methodology for determining some modal parameters (frequencies, damping ratios, and seismic eigenvectors) and, under certain hypotheses, the physical matrices of a general structure with proportional damping and subjected to seismic loads.
The procedure is based on a time-domain state space formulation from which the modal parameters, including the seismic eigenvectors, and the complex eigenvectors of the system can be derived also in the case of a limited set of instrumentations.
The conditions to normalize the eigenvectors are then illustrated and, finally, applied to derive the second-order matrices of the system.
The proposed procedure is applied to some numerical examples also in the case of noise-polluted measurements and to an experimental investigation performed on a four-story steel frame subjected to earthquake excitations.
An optimization procedure to improve the prediction of the first-order modal parameters of the system is also discussed and experimentally proved.
American Psychological Association (APA)
De Angelis, M.& Imbimbo, Maura. 2012. A Procedure to Identify the Modal and Physical Parameters of a Classically Damped System under Seismic Motions. Advances in Acoustics and Vibration،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-512818
Modern Language Association (MLA)
De Angelis, M.& Imbimbo, Maura. A Procedure to Identify the Modal and Physical Parameters of a Classically Damped System under Seismic Motions. Advances in Acoustics and Vibration No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-512818
American Medical Association (AMA)
De Angelis, M.& Imbimbo, Maura. A Procedure to Identify the Modal and Physical Parameters of a Classically Damped System under Seismic Motions. Advances in Acoustics and Vibration. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-512818
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-512818