A smart system to determine sensor locations for structural health monitoring of ship structures

Adnan Kefal, Olgun Guven Hizir, Erkan Oterkus

Research output: Contribution to conferencePaper

Abstract

Utilizing the strain data collected from on-board strain sensors in order to solve the inverse problem of real time reconstruction of full-field structural displacements, strains, and stresses is known as displacement and stress monitoring. Displacement and stress monitoring is the vital feature for performing Structural Health Monitoring (SHM). An efficient algorithm called inverse Finite Element Method (iFEM) was recently developed for displacement and stress monitoring of engineering structures. Obtaining the surface strain measurements from the sensors placed on the optimum locations of structure is crucial in terms of the iFEM methodology. Therefore, the main goal of this work is to develop a smart system that determines the most appropriate and practical locations of the on-board strain sensors for SHM of ship structures. The system is developed by combining three different in-house software, hydrodynamic software, finite element software, and iFEM software. The following execution sequence is used. First, the hydrodynamic analysis is performed in order to find hydrodynamic ship loading and rigid body motion of the ship. Then, finite element analysis is performed to obtain structural response and simulated sensor-strain data. Finally, iFEM analysis is performed to reconstruct the three-dimensional global structural response by using the simulated strain data obtained from different number of strain sensors located at various locations of the structure as input. By utilizing the developed system, a long barge is analyzed and the optimum locations for placing on-board sensors are determined and discussed.

Conference

Conference9th International Workshop on Ship and Marine Hydrodynamics
Abbreviated titleIWSH2015
CountryUnited Kingdom
CityGlasgow
Period25/08/1528/08/15
Internet address

Fingerprint

Structural health monitoring
Ships
Sensors
Finite element method
Hydrodynamics
Monitoring
Barges
Strain measurement
Surface measurement
Inverse problems

Keywords

  • structural health monitoring
  • inverse finite element method
  • marine structures
  • sensor network
  • hydrodynamic loads

Cite this

Kefal, A., Hizir, O. G., & Oterkus, E. (2015). A smart system to determine sensor locations for structural health monitoring of ship structures. Paper presented at 9th International Workshop on Ship and Marine Hydrodynamics, Glasgow, United Kingdom.
Kefal, Adnan ; Hizir, Olgun Guven ; Oterkus, Erkan. / A smart system to determine sensor locations for structural health monitoring of ship structures. Paper presented at 9th International Workshop on Ship and Marine Hydrodynamics, Glasgow, United Kingdom.10 p.
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Kefal, A, Hizir, OG & Oterkus, E 2015, 'A smart system to determine sensor locations for structural health monitoring of ship structures' Paper presented at 9th International Workshop on Ship and Marine Hydrodynamics, Glasgow, United Kingdom, 25/08/15 - 28/08/15, .

A smart system to determine sensor locations for structural health monitoring of ship structures. / Kefal, Adnan; Hizir, Olgun Guven; Oterkus, Erkan.

2015. Paper presented at 9th International Workshop on Ship and Marine Hydrodynamics, Glasgow, United Kingdom.

Research output: Contribution to conferencePaper

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AB - Utilizing the strain data collected from on-board strain sensors in order to solve the inverse problem of real time reconstruction of full-field structural displacements, strains, and stresses is known as displacement and stress monitoring. Displacement and stress monitoring is the vital feature for performing Structural Health Monitoring (SHM). An efficient algorithm called inverse Finite Element Method (iFEM) was recently developed for displacement and stress monitoring of engineering structures. Obtaining the surface strain measurements from the sensors placed on the optimum locations of structure is crucial in terms of the iFEM methodology. Therefore, the main goal of this work is to develop a smart system that determines the most appropriate and practical locations of the on-board strain sensors for SHM of ship structures. The system is developed by combining three different in-house software, hydrodynamic software, finite element software, and iFEM software. The following execution sequence is used. First, the hydrodynamic analysis is performed in order to find hydrodynamic ship loading and rigid body motion of the ship. Then, finite element analysis is performed to obtain structural response and simulated sensor-strain data. Finally, iFEM analysis is performed to reconstruct the three-dimensional global structural response by using the simulated strain data obtained from different number of strain sensors located at various locations of the structure as input. By utilizing the developed system, a long barge is analyzed and the optimum locations for placing on-board sensors are determined and discussed.

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Kefal A, Hizir OG, Oterkus E. A smart system to determine sensor locations for structural health monitoring of ship structures. 2015. Paper presented at 9th International Workshop on Ship and Marine Hydrodynamics, Glasgow, United Kingdom.