Strain estimation using modal expansion approach via virtual sensing for structural asset management

Callum Roberts, Sophie Isbister, Cameron Murphy, Calvin Nisbet, Paul Sweeney, David Garcia Cava, Dmitri Tcherniak

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Abstract

This study explores the concept of virtual sensing as a potential application for estimating dynamic strain in a virtual location. The study was carried out on a vertical cantilever beam which was used to represent a vertical structure. The acceleration responses were measured in four locations and, through Operational Modal Analysis (OMA) and Modal Decomposition and Expansion (MDE) techniques, was then estimated in a virtual location. The dynamic strain was then estimated in the same virtual location. First the measured acceleration responses were compared to predicted responses using OMA. This was done to update the finite element model and optimise the position of the sensors. From this point the dynamic strain could then be estimated in the virtual location using Modal Decomposition and Expansion. This methodology was then repeated for the same beam with additional mass attached to the top. The dynamic strains were then measured and compared to determine the effect of the additional mass on the structural response. The results from this study demonstrated the potential of this methodology to estimate and monitor real time dynamic strain in virtual locations.
Original languageEnglish
Number of pages10
Publication statusPublished - 7 Sep 2018
Event1st International Conference on Structural Integrity for offshore energy industry - Aberdeen, United Kingdom
Duration: 6 Sep 20187 Sep 2018
Conference number: 1
https://asranet.co.uk/Content/Files/SI.pdf

Conference

Conference1st International Conference on Structural Integrity for offshore energy industry
Abbreviated titleSI
CountryUnited Kingdom
CityAberdeen
Period6/09/187/09/18
Internet address

Keywords

  • virtual sensing
  • operational modal analysis
  • modla expansion
  • damage assessment
  • wind turbine

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    Roberts, C., Isbister, S., Murphy, C., Nisbet, C., Sweeney, P., Garcia Cava, D., & Tcherniak, D. (2018). Strain estimation using modal expansion approach via virtual sensing for structural asset management. Paper presented at 1st International Conference on Structural Integrity for offshore energy industry, Aberdeen, United Kingdom.