Structural health monitoring of marine structures by using inverse finite element method

Kefal, A. and Oterkus, E.; Guedes Soares, C. and Shenoi, R A, eds. (2015) Structural health monitoring of marine structures by using inverse finite element method. In: Analysis and design of marine structures. CRC Press/Balkema, GBR, pp. 341-350. ISBN 9781138027893

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    Abstract

    A new state-of-the art methodology named as inverse Finite Element Method (iFEM) is adopted to solve the inverse problem of real-time reconstruction of full-field structural displacements, strains, and stresses. iFEM has shown to be precise, robust, and fast enough to reconstruct the three dimensional displacement field of structures in real-time by utilizing surface strain measurements obtained from strain sensors embedded on the structure. The numerical implementation of the iFEM methodology is done by considering four-node inverse quadrilateral shell element. Two demonstration cases are presented including a quadrilateral plate subjected to bending force and a stiffened plate under bending loading. Finally, the effect of sensor locations, number of sensors and the discretization of the geometry are examined on solution accuracy.