Ambient vibration testing and operational modal analysis of monopole telecoms structures

A structural health monitoring (SHM) system was developed to study the ambient response of monopole communication structures in the UK operated by Arqiva Ltd. The exercise had several purposes that included the evaluation of the SHM system itself and the system identification procedures applied to t...

Full description

Saved in:
Bibliographic Details
Published inJournal of civil structural health monitoring Vol. 11; no. 4; pp. 1077 - 1091
Main Authors Jimenez Capilla, Jose Alfonso, Au, Siu-Kui, Brownjohn, James Mark William, Hudson, Emma
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2021
Springer Nature B.V
Subjects
Antenna arrays
Assessments
Civil Engineering
Control
Damping
Design standards
Dynamic structural analysis
Dynamical Systems
Engineering
Evaluation
Measurement Science and Instrumentation
Modal analysis
Monopoles
Original Paper
Stiffness
Structural health monitoring
System identification
Telecommunications
Vibration
Vibration analysis
Windows (intervals)
Monitoring system
Telecoms structures
Monopoles
Operational modal analysis
Online AccessGet full text

Cover

More Information
Summary:A structural health monitoring (SHM) system was developed to study the ambient response of monopole communication structures in the UK operated by Arqiva Ltd. The exercise had several purposes that included the evaluation of the SHM system itself and the system identification procedures applied to the data, followed by analysis of the evaluated modal properties to validate the current analytical models, structural assessments and standardised design procedures advising on dynamics actions. This paper describes the instrumentation and procedures used during monitoring of a lightweight flexible 14.5 m tubular tapered monopole supporting an array of mobile telecoms antennas. A Bayesian OMA (BAYOMA) approach is implemented to identify structural modal properties under different time windows as comparison for further assessments. Results from stochastic subspace identification are also obtained and compared. The correlation between modal properties and monitoring wind-response data reveals specific tendencies such as nonlinear stiffness behaviour, the existence of aerodynamic damping and typical directionality of the mode shapes with future implications for reformulation of current methods of assessing dynamics on monopole.
ISSN:2190-5452
2190-5479
DOI:10.1007/s13349-021-00499-4