Parametric modelling of nonstationary platform deck motions

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dc.contributor.author Mandal, S.
dc.date.accessioned 2009-01-12T09:29:32Z
dc.date.available 2009-01-12T09:29:32Z
dc.date.issued 1997
dc.identifier.citation Proceedings of the Second Indian National Conference on Harbour and Ocean Engineering (Inchoe-97), Thiruvananthapuram, December 7-10, 1997. Vol. 1, 368-377p.
dc.identifier.uri http://drs.nio.org/drs/handle/2264/2083
dc.description.abstract Univariate system identification models are, in general, developed based on teh assumption that offshore dynamic systems are stationary random processes. For nonstationary processes, a method is adopted to transform the time series into wide-sense-stationary processes. Then the time series are modelled by the maximum entropy method which is formulated here for spectral estimation of platform deck displacements. The lower order maximum entropy spectra of nonstationary platform deck displacements are compared with fast Fourier transform spectra and show good agreement. However, the higher order maximum entropy model can be used for better representation of nonstationary motions. This method also reduces long time series of nonstationary offshore data into a few values which are teh coefficients of the maximum entropy model.
dc.language.iso en
dc.publisher Cent. for Earth Sci. Stud., Cochin (India)
dc.rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subject models
dc.subject offshore
dc.subject dynamics
dc.subject modelling
dc.subject entropy
dc.title Parametric modelling of nonstationary platform deck motions
dc.type Conference Article


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