Finite element model updating using Lagrange interpolation

Author:

Asma F.1

Affiliation:

1. Laboratory of Elaboration and Characterization of Materials and Modelling (LEC2M) , Mouloud Mammeri University of Tizi-Ouzou , Tizi-Ouzou , BP 17 RP 15000 , Algeria

Abstract

Abstract In this paper, an iterative finite element model updating method in structural dynamics is proposed. This uses information matrices and element connectivity matrices to reconstruct the corrected model by reproducing the frequency response at measured degrees of freedom. Indicators have been proposed to quantify the mismodelling errors based on a development in Lagrange matrix interpolation. When applied on simulated truss structures, the model gives satisfactory results by detecting and quantifying the defaults of the initial model.

Publisher

Walter de Gruyter GmbH

Subject

General Medicine

Reference23 articles.

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3. Wei, F.S.: Analytical dynamic model improvement using vibration test data. AIAA J., 28, 175–177, 1990.10.2514/3.10371

4. Gysin, H.P.: Critical application of the error matrix method for localisation of finite element modelling inaccuracies. Proceedings of the 4th International Modal Analysis Conference, 1339–1351, 1986.

5. He, J., Ewins, D.J.: Analytical stiffness matrix correction using measured vibration modes. Modal Anal. 1(3), 9–14 ,1986.

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