Research on structural deformation reconstruction based on inverse finite element method
An inverse finite element method for reconstructing the displacement field using strain information is pro-posed to address the problem that the structural health status of an offshore platform is challenging to monitor in real-time.This paper is based on Timoshenko beams and least squares variational theory to calculate the neutral axis strain in a section by extracting the strain from the surface of the structure.The strain field and displacement field functions are also derived and the strain information is used as an input condition for the inverse finite element method to reconstruct the structural de-formation.To improve the tolerance of the proposed method,the effects of strain gauge position deviation and signal noise on the accuracy are analyzed.The finite element analysis results and the measured structural strain information are used to reconstruct the displacement field using the marine platform column as the test object,respectively.The test results show that the proposed inverse finite element method has a high reconstruction accuracy under different load forms.
inverse finite elementoffshore platform columndeformation reconstructionstructural health monit-oring
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