Please use this identifier to cite or link to this item: https://doi.org/10.1006/jsvi.2001.3814
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dc.titleDetermination of elastic constants of anisotropic laminated plates using elastic waves and a progressive neural network
dc.contributor.authorLiu, G.R.
dc.contributor.authorLam, K.Y.
dc.contributor.authorHan, X.
dc.date.accessioned2014-06-17T06:16:41Z
dc.date.available2014-06-17T06:16:41Z
dc.date.issued2002-04-25
dc.identifier.citationLiu, G.R., Lam, K.Y., Han, X. (2002-04-25). Determination of elastic constants of anisotropic laminated plates using elastic waves and a progressive neural network. Journal of Sound and Vibration 252 (2) : 239-259. ScholarBank@NUS Repository. https://doi.org/10.1006/jsvi.2001.3814
dc.identifier.issn0022460X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/59882
dc.description.abstractIn this paper, a procedure is suggested to inversely determine the elastic constants of anisotropic laminated plates using a progressive neural network (NN). The surface displacement responses are used as the inputs for the NN model. The outputs of the NN are the elastic constants of anisotropic laminated plates. The hybrid numerical method (HNM) is used to calculate the displacement responses of laminated plates to an incident wave for given elastic constants. The NN model is trained using the results from the HNM. A modified back-propagation learning algorithm with a dynamically adjusted learning rate and an additional jump factor is developed to tackle the possible saturation of the sigmoid function and to speed up the training process for the NN model. The concept of orthogonal array was adopted to generate the representative combinations of elastic constants, which reduces significantly the number of training data while maintaining its data completeness. Once trained, the NN model can be used for on-line determination of the elastic constants if the dynamic displacement responses on the surface of the laminated plate can be obtained. The determined elastic constants are then used in the HNM to calculate the displacement responses. The NN model would go through a progressive retraining process until the calculated displacement responses using the determined results are sufficiently close to the actual responses. This procedure is examined for an actual glass/epoxy laminated plate. It is found that the present procedure is very robust and efficient for determining the elastic constants of anisotropic laminated plates.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1006/jsvi.2001.3814
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1006/jsvi.2001.3814
dc.description.sourcetitleJournal of Sound and Vibration
dc.description.volume252
dc.description.issue2
dc.description.page239-259
dc.description.codenJSVIA
dc.identifier.isiut000175766300003
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