Finite element updating


14-Dec-2019 06:28

finite element updating-62

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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. We use cookies to make interactions with our website easy and meaningful, to better understand the use of our services, and to tailor advertising.A finite model updating method that combines dynamic-static long-gauge strain responses is proposed for highway bridge static loading tests.For this method, the objective function consisting of static long-gauge stains and the first order modal macro-strain parameter (frequency) is established, wherein the local bending stiffness, density and boundary conditions of the structures are selected as the design variables.This corresponding relation is important for the modification of the local stiffness based on the macro-strain.The local and global parameters can be simultaneously updated.The relationship between the macro-strain and local element stiffness was studied first.It is revealed that the macro-strain is inversely proportional to the local stiffness covered by the long-gauge strain sensor.

finite element updating-17

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Herein, its effectiveness is validated through the fatigue assessment of a lively footbridge considering two different numerical models: (i) a preliminary finite element (FE) model and (ii) an updated version of the preliminary model based on the modal parameters of the footbridge identified experimentally.

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.

Two updating cases show that the optimization sequences converge quickly and significant improvements in frequency prediction are achieved.

Experimental and operational modal analysis and simulation make benefit from common databases.

Some applications presented emphasize the advantages of these techniques.The purpose of the different settings is to get the best numerical riveted lap joint representation relatively to the experimental one.



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