Localization and Identification of structural nonlinearities using neural networks

Date

2013-02-14

Author

Yumer, Mehmet Ersin
Koyuncu, Anıl
Ciğeroğlu, Ender
Özgüven, Hasan Nevzat

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In this study, a new approach is proposed for identification of structural nonlinearities by employing neural networks. Linear finite element model of the system and frequency response functions measured at arbitrary locations of the system are used in this approach. Using the finite element model, a training data set is created, which appropriately spans the possible nonlinear configurations space of the system. A classification neural network trained on these data sets then localizes and determines the type of nonlinearity associated with the corresponding degree of freedom in the system. A new training data set spanning the parametric space associated with the determined nonlinearities is created to facilitate parametric identification. Utilizing this data set, a feed forward regression neural network is trained, which parametrically identifies the related nonlinearity. The application of the proposed approach is demonstrated on an example system with nonlinear elements. The proposed approach does not require data collection from the degrees of freedoms related with nonlinear elements, and furthermore, the proposed approach is sufficiently accurate even in the presence of measurement noise.

Subject Keywords

Nonlinear system identification, Frequency response function, Vibration tests

URI

https://hdl.handle.net/11511/74530
https://www.scopus.com/record/display.uri?eid=2-s2.0-84880517209&origin=resultslist&sort=plf-f&src=s&st1=&st2=&sid=b0c3986c75c4d2674540997dec07a7ab&sot=b&sdt=b&sl=98&s=TITLE-ABS-KEY+%28Localization+and+Identification+of+structural+nonlinearities+using+neural+networks%29&relpos=1&citeCnt=3&searchTerm=

DOI

https://doi.org/10.1007/978-1-4614-6570-6_9

Conference Name

31st IMAC, A Conference on Structural Dynamics, (11-14 February 2013)

Collections

Department of Mechanical Engineering, Conference / Seminar

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Citation Formats

M. E. Yumer, A. Koyuncu, E. Ciğeroğlu, and H. N. Özgüven, “Localization and Identification of structural nonlinearities using neural networks,” Garden Grove, CA, United States, 2013, vol. 1, p. 103, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/74530.