A Structural Health Monitoring System for Storage Tanks by Using Fiber Optic Sensor

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پایش وضعیت مخازن نگهداری با استفاده از سنسور فیبر نوری

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Type of Document: M.Sc. Thesis
Language: English
Document No: 40460 (58)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Zabihollah, Abolgassem
Abstract:
Storage tanks are always under different hazards such as corrosion and leaking. In this thesis after studding current damaged detection methods, a new method of corrosion monitoring on storage tanks was performed. Fiber optic technology was explained and Fiber Bragg grating (FBG) was chosen as a sensor. Modeling of optical fiber and storage tank was performed in ANSYS and corrosion damage, in the form of pitting, in two possible states of occurrence was presented. The effect of change of strain, thickness, loading, length, and wavelength on each other was presented in different graphs. The results showed that by decreasing thickness of elements, strain in the damaged area increased and by increasing pressure load on the system, strain in the damaged area increased. The biggest strain belongs to damaged elements. It means that, if we want to locate the damage based on the length of the fiber, the place which has the biggest value of strain is a defected position and also strain in this place will cause the biggest change in the wavelength value.
Keywords:
Condition Monitoring ; Fiber Optics ; Corrosion ; Fiber Bragg Grating (FBG)

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