Finite element updating

Inconsistency in the frequency results due to erroneous inputs of geometrical and material parameters to the finite element analysis can be salvaged by applying the finite element model updating procedure.

In parallel, samples of two aluminum material plates connected by different quantities of rivets (1, 3 and 5) are built and tested in order to be known its modal characteristics – natural frequencies and mode shapes.

An evaluation of the best numerical riveted lap joint is carried out based on comparisons between the numerical model after updating and the experimental one.

It is shown that the riveted lap joints composed by eight and twelve spring-damper elements per rivet have the best representation.

Then, a series of numerical simulation and experiments were conducted to verify the effectiveness of the proposed method.

The results show that the static deformation, macro-strain and macro-strain modal can be predicted well by using the proposed updating model.

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View Full-Text This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited . Chicago/Turabian Style Wu, Bitao; Lu, Huaxi; Chen, Bo; Gao, Zhicheng.

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