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TECHNICAL PAPERS
Apr 1, 2000

Conditional Simulation of a Class of Nonstationary Space-Time Random Fields

Publication: Journal of Engineering Mechanics
Volume 126, Issue 4

Abstract

This paper first addresses the problem of conditionally simulating stationary, space-time, Gaussian random fields. A method developed for quadrant-symmetric, stationary, space-time fields is extended to account for the imaginary part of the complex cross-spectrum. The case of amplitude- and frequency-modulated (AFM) nonstationary space-time fields is studied next. The evolutionary spectral density and cross-correlation structure of such a class of nonstationary random fields are analyzed in terms of the envelope and frequency modulation functions. A method for the conditional simulation of AFM space-time fields is advanced. The AFM nonstationary fields are mapped to a domain where the conditional simulation is performed as for stationary, space-time fields. Examples are given to illustrate the use and capabilities of the method including applications to the simulation of earthquake ground motions.

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Information & Authors

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Published In

Go to Journal of Engineering Mechanics
Journal of Engineering Mechanics
Volume 126Issue 4April 2000
Pages: 398 - 404

History

Received: Mar 16, 1999
Published online: Apr 1, 2000
Published in print: Apr 2000

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Authors

Affiliations

Prof. and Res., Instituto de Ingenieria, UNAM, Coyoacan 04510, Mexico DF, Mexico. E-mail: [email protected]
Grad. Student, Instituto de Ingenieria, UNAM, Coyoacan 04510, Mexico DF, Mexico.

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