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A platform for research: civil engineering, architecture and urbanism
Local finite element model updating with forced vibration measurements
Finite element (FE) model updating based on the method of selective sensitivity analysis is applied to a girder bridge. The response patterns are chosen in accordance with the selective sensitivity criteria and result in a set of four independent local girder bridge response patterns. The excitation of these patterns is conducted with a four-shaker system. This effectively reduces the degrees of freedom of the corresponding FE model from 486 to 7. Excitations and responses are measured at three nodes of each selective sensitive pattern. Local finite element model updating is conducted by minimising the influence of the rest of the structure and by maximising the relative sensitivities with the inclusion of the fourth shaker. This excitation is shown to be model independent; therefore, updating is separated from the measurement process. An independent verification shows the ability of the proposed method to identify submodel parameters. The sensitivities of the accelerometers used were very small, which impacted the data quality. Updating results are discussed considering these limits.
Local finite element model updating with forced vibration measurements
Finite element (FE) model updating based on the method of selective sensitivity analysis is applied to a girder bridge. The response patterns are chosen in accordance with the selective sensitivity criteria and result in a set of four independent local girder bridge response patterns. The excitation of these patterns is conducted with a four-shaker system. This effectively reduces the degrees of freedom of the corresponding FE model from 486 to 7. Excitations and responses are measured at three nodes of each selective sensitive pattern. Local finite element model updating is conducted by minimising the influence of the rest of the structure and by maximising the relative sensitivities with the inclusion of the fourth shaker. This excitation is shown to be model independent; therefore, updating is separated from the measurement process. An independent verification shows the ability of the proposed method to identify submodel parameters. The sensitivities of the accelerometers used were very small, which impacted the data quality. Updating results are discussed considering these limits.
Local finite element model updating with forced vibration measurements
Billmaier, Maximilian (author) / Bucher, Christian (author) / Tributsch, Alexander (author)
Structure and Infrastructure Engineering ; 10 ; 1573-1594
2014-12-02
22 pages
Article (Journal)
Electronic Resource
English
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