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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
• 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.
• 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
• 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