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Application of conditioned reverse path method to large multi-degree-of-freedom nonlinear structure

Norfazrina, H. M. Y. and Muhamad, P. and Aminudin, B. A. and Wahab, A. M. and Raihan, M. R. (2015) Application of conditioned reverse path method to large multi-degree-of-freedom nonlinear structure. Arpn Jourl Of Engineering And Applied Sciences, 10 (15). pp. 6571-6577. ISSN 1819-6608

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Abstract

Nonlinear system identification (NSI) has received a fair amount of attention in recent years. The highlyindividual nature of nonlinearity makes it important to fully understand the implication of nonlinear behavior.Nevertheless, the application of NSI to a more complex multi-degree-of-freedom (MDOF)system is still scarce andlimited. A spectral approach called the Conditioned Reverse Path (CRP) method is chosen to test the capability of saidmethod in identifying underlying linear characteristics. A 240 degree-of-freedom airplane-like structure with a cubicnonlinearity attached between the wings and the engines is modelled using MSC Patran/Nastran software to generate thedesired responses. The obtained responses are then imported to Matlab software to proceed with spectral analysis utilizingthe CRP method. Unfortunately, the CRP could not depict its capability as one of the advantageous method in the NSI areaand further works are necessary to improve the airplane-like modelling thus determine the true underlying linear system.Once the modelling is reliable to be applied in the CRP, a more recent method called the Orthogonalised Reverse Path(ORP) method will be applied as future works.

Item Type:Article
Subjects:A General Works
ID Code:57857
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:06 Sep 2017 09:47

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