Effects of environmental and operational variability on structural health monitoring
Abstract
Stated in its most basic form, the objective of structural health monitoring is to ascertain if damage is present or not based on measured dynamic or static characteristics of a system to be monitored. In reality, structures are subject to changing environmental and operational conditions that affect measured signals, and these ambient variations of the system can often mask subtle changes in the system's vibration signal caused by damage. Data normalization is a procedure to normalize datasets, so that signal changes caused by operational and environmental variations of the system can be separated from structural changes of interest, such as structural deterioration or degradation. This paper first reviews the effects of environmental and operational variations on real structures as reported in the literature. Then, this paper presents research progresses that have been made in the area of data normalization.
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Environmental factors, particularly temperature, are known to affect the reliability of OMA-based damage detection because they influence the modal parameters of undamaged structures.
“Environmental factors—particularly temperature—are known to affect the reliability of OMA-based damage detection, as they influence the modal parameters of undamaged structures [24].”
Temperature variations influence Young's modulus of most construction materials and boundary conditions.
“Temperature variations influence Young's modulus of most construction materials [220] and boundary conditions [221][222][223].”
From Review on the new development of vibration-based damage identification for civil engineering structures: 2010–2019 (2021) · cites this paper as [221]
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“Environmental factors—particularly temperature—are known to affect the reliability of OMA-based damage detection, as they influence the modal parameters of undamaged structures [24].”
- Authors
- Sohn, H.
- Affiliations
- Civil and Environmental Engineering Department, Carnegie Mellon UniversityPittsburgh, PA 15213, USA
- Venue
- Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
- Publisher
- The Royal Society
- Published
- 2006-12-13
- Volume
- 365
- Issue
- 1851
- Pages
- 539-560
- ISSN
- 1364-503X (ISSN-L)
- 1471-2962
- OpenAlex
- W2147926935
- Cited by
- 883
- References
- 47
- Citations by year
- 2026: 63 · 2025: 62 · 2024: 59 · 2023: 57 · 2022: 62 · 2021: 57 · 2020: 57 · 2019: 63 · 2018: 51 · 2017: 61 · 2016: 58 · 2015: 43 · 2014: 37 · 2013: 34 · 2012: 30
- FWCI
- 53.55
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Structural Health Monitoring Techniques
- Physical Sciences › Engineering › Mechanical Engineering › Transport Systems and Technology
- Physical Sciences › Engineering › Control and Systems Engineering › Machine Fault Diagnosis Techniques
- Keywords
- structural health monitoring, environmental variability, operational variability, data normalization, vibration signals, damage detection, signal masking, structural deterioration, ambient conditions
- MeSH terms
- Algorithms, Computer Simulation, Construction Materials, Engineering, Environment, Environmental Monitoring, Equipment Design, Facility Design and Construction, Maintenance, Materials Testing, Models, Theoretical, Signal Processing, Computer-Assisted, Transducers, Vibration, Equipment Failure Analysis
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