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Prediction of flutter derivatives by artificial neural networks

✍ Scribed by Chern-Hwa Chen; Jong-Cheng Wu; Jow-Hua Chen

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 451 KB
Volume: 96
Category: Article
ISSN: 0167-6105
DOI: 10.1016/j.jweia.2008.02.044

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✦ Synopsis

This study presents an approach using artificial neural networks (ANN) algorithm for predicting the flutter derivatives of rectangular section models without wind tunnel tests. Firstly, a database of flutter derivatives is identified from a back-propagation (BP) ANN model that is built using experimental dynamic responses of rectangular section models in smooth flow as the input/output data. Then, these limited sets of database are employed as input/output data to establish a prediction ANN frame model to further predict the flutter derivatives for other rectangular section models without conducting wind tunnel tests. The results presented indicate that this ANN prediction scheme works reasonably well. Therefore, instead of going through wind tunnel tests, this ANN approach provides a convenient and feasible option for expanding the flutter derivative database that can help to determine an appropriate basic shape of the bridge section in the preliminary design.

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