Stochastic Finite Elements: A Spectral Approach

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9783540974567: Stochastic Finite Elements: A Spectral Approach

Discrepancies frequently occur between a physical system's responses and predictions obtained from mathematical models. The Spectral Stochastic Finite Element Method (SSFEM) has proven successful at forecasting a variety of uncertainties in calculating system responses. This text analyzes a class of discrete mathematical models of engineering systems, identifying key issues and reviewing relevant theoretical concepts, with particular attention to a spectral approach.
Random system parameters are modeled as second-order stochastic processes, defined by their mean and covariance functions. Relying on the spectral properties of the covariance function, the Karhunen-Loeve expansion is employed to represent these processes in terms of a countable set of uncorrected random variables, casting the problem in a finite dimensional setting. Various spectral approximations for the stochastic response of the system are obtained. Implementing the concept of generalized inverse leads to an explicit expression for the response process as a multivariate polynomial functional of a set of uncorrelated random variables. Alternatively, the solution process is treated as an element in the Hilbert space of random functions, in which a spectral representation is identified in terms of polynomial chaos. In this context, the solution process is approximated by its projection onto a finite subspace spanned by these polynomials.

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Roger G. Ghanem et P. D. Spanos
Published by Springer-Verlag Berlin and Heidelberg GmbH & Co. K (1991)
ISBN 10: 3540974563 ISBN 13: 9783540974567
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Book Description Springer-Verlag Berlin and Heidelberg GmbH & Co. K, 1991. Hardcover. Book Condition: Bon. Ancien livre de bibliothèque. Edition 1991. Ammareal reverse jusqu'à 15% du prix net de ce livre à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Good. Former library book. Edition 1991. Ammareal gives back up to 15% of this book's net price to charity organizations. Bookseller Inventory # A-607-682

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