Direct assignment of the dynamics of a laboratorial model using an active bracing system

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

C. Moutinho (Autor) FEUP; A. Cunha (Autor) FEUP; E. Caetano (Autor) FEUP

Revista

Título: Smart Structures and Systems

Vol. 8 Nº 2

Páginas: 205-217

ISSN: 1738-1584

Editora: Techno Press

Indexação

ISI Web of Knowledge - 0 Citações

ISI Web of Science

Scopus - 0 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Engenharia estrutural

Outras Informações

ID Authenticus: P-002-P3W

DOI: 10.12989/sss.2011.8.2.205

Abstract (EN): This article describes the research work involving the implementation of an Active Bracing System aimed at the modification of the initial dynamics of a laboratorial building structure to a new desired dynamics. By means of an adequate control force it is possible to assign an entirely new dynamics to a system by moving its natural frequencies and damping ratios to different values with the purpose of achieving a better overall structural response to external loads. In Civil Engineering applications, the most common procedures for controlling vibrations in structures include changing natural frequencies in order to avoid resonance phenomena and increasing the damping ratios of the critical vibration modes. In this study, the actual implementation of an active system is demonstrated, which is able to perform such modifications in a wide frequency range; to this end, a plane frame physical model with 4 degrees-of-freedom is used. The Active Bracing System developed is actuated by a linear motor controlled by an algorithm based on pole assignment strategy. The efficiency of this control system is verified experimentally by analyzing the control effect obtained with the modification of the initial dynamic parameters of the plane frame and observing the subsequent structural response.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13