Advanced Structural Health Monitoring Method by Integrated Isogeometric Analysis and Distributed Fiber Optic Sensing

• Published in: Sensors (Basel, Switzerland) Vol. 21; no. 17; p. 5794
• Main Authors: Aung, Thein Lin, Ma, Ninshu, Kishida, Kinzo, Guzik, Artur
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 28.08.2021; MDPI
• Subjects: Accuracy; Boundary conditions; Communication; Construction costs; Contact force; Coordinate transformations; Design; distributed fiber optic sensing; Earthquakes; Efficiency; Fiber optics; Geometry; isogeometric analysis; Material properties; Monitoring systems; Numerical analysis; numerical method for remote monitoring; Numerical models; Pipes; Power; Sensors; Strain gauges; Structural health monitoring; Japan
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s21175794

Attempts in digital management of structures are among the most popular topics in the trend of Information of Things (IoT). However, the implementation lags behind. This work recognized that Computer Aided Design (CAD) comprises the core of modern engineering; thus, most digital information can be available if CAD is used not only in design but also for life cycle structural health monitoring (SHM). Based on this concept, the newly designed method utilizes the isogeometric analysis (IGA) tool to include the Distributed Fiber Optic Sensing (DFOS) information by proposing a fiber mesh model. The IGA model can be obtained directly from CAD, and the boundary conditions can be provided directly or indirectly from DFOS in real time and remotely. Hence a practical method of SHM is able to achieve highly efficient and accurate numerical model creation, which can even accommodate non-linear constitutive property of materials. The proposed method was applied to a pipe deformation model as an example. The inverse analysis method is also shown to determine the contact force for loading on the pipe, which shows the potential for many engineering applications.