LabVIEW toolkits for output-only modal identification and long-term dynamic structural monitoring

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Wei-Hua Hu (Author) Other; Álvaro Cunha (Author) FEUP; Elsa Caetano (Author) FEUP; Filipe Magalhães (Author) FEUP; Carlos Moutinho (Author) FEUP

Journal

Title: Journal of Structure and Infrastructure Engineering

Vol. 6 No. 5

Pages: 557-574

ISSN: 1744-8980

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 18 Citations

ISI Web of Science

Scopus - 28 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

Authenticus ID: P-003-CZA

DOI: 10.1080/15732470903068672

Abstract (EN): This paper describes the development of computational tools for modal identification and long term dynamic monitoring in LabVIEW environment. These tools mainly consist of two individual toolkits for structural modal identification (SMI) and continuous monitoring (CSMI), respectively. The SMI toolkit implements the frequency domain Peak-Picking (PP) and Enhanced Frequency Domain Decomposition (EFDD) method, as well as the time domain Stochastic Subspace Identification (SSI) techniques. Based on this toolkit, the user can easily develop the whole process of structural modal identification by simply pushing buttons. The CSMI toolkit was conceived for continuous dynamic monitoring excluding manual interaction. It automatically searches the latest output measurements, detects maximum vibration amplitudes and makes statistical treatment of acceleration time series, generates waterfall plots for depicting the frequency component distribution and identifies modal parameters based on automated EFDD technique. The application of these tools is briefly described based on experimental data collected at Pinhão bridge and Coimbra footbridge.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 18