CONDITIONAL SIMULATION OF A CLASS OF NONSTATIONARY SPACE-TIME RANDOM FIELDS
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 paper then addresses the case of amplitude- and frequency-modulated (AFM) nonstationary space-time fields. 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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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
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Supplemental Notes:
- Research assistantships for this study were provided by the Direccion General de Asuntos del Personal Academico from UNAM, Coyoacan, Mexico, under grants PAPIIT-IN114296 and PAPIIT-IN123698.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Heredia-Zavoni, E
- Santa-Cruz, S
- Publication Date: 2000-4
Language
- English
Media Info
- Features: Appendices; Figures; References;
- Pagination: p. 398-404
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Serial:
- Journal of Engineering Mechanics
- Volume: 126
- Issue Number: 4
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9399
- EISSN: 1943-7889
- Serial URL: http://ascelibrary.org/journal/jenmdt
Subject/Index Terms
- TRT Terms: Algorithms; Cross correlation; Earthquakes; Fast Fourier transforms; Seismicity; Simulation; Soil mechanics; Time series analysis
- Uncontrolled Terms: Gaussian random fields; Space time fields
- Subject Areas: Geotechnology; Highways; Pipelines; I42: Soil Mechanics;
Filing Info
- Accession Number: 00794046
- Record Type: Publication
- Contract Numbers: NSC88-2611-E-005-006, CMS-9616720, CE-NSF-7899-98
- Files: TRIS
- Created Date: Jun 22 2000 12:00AM