Damage Identification in Conical Shell Structures Using Analytical Methods Based on Free Vibration of the Structure

Document Type : Research Article

Authors

1 Department of Civil Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran

2 Department of Mechanical Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran

Abstract

Structural health monitoring and detection of damaged areas in a structure is essential for surveying its performance during the structural life. Because not paying attention to the local damages is reduced the efficiency of the structural performance and could result in increasing the damaged intensity due to natural or artificial loads and consequently collapse of entire structure. The main goal of this research is to propose a model using analytical methods and developing it to identify the damaged areas in conical shells made of functionally graded materials placed on an elastic substrate. Since the mode shapes are sensitive parameters to damage presence in the elements, they are used for damage detection process of the structure. The governing equations have been extracted based on the first-order shear theory in Maple software. The analytical method uses the power series to obtain the natural frequencies and mode shapes of the structure. In order to ensure the performance of the proposed model, the results of the modeling have been verified with the results of other references and those of the numerical model built in Abaqus software.Finally, taking into account various types of support conditions and different stiffnesses for the substrate, the damaged elements of the conical shell have been specified considering different damage scenarios.Investigations show the proper performance of the proposed model in detecting the damaged area.

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References

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Amirkabir Journal of Civil Engineering
Volume 57, Issue 7
October 2025
Pages 1195-1220

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