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:
  • 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

Subject/Index Terms

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