THE ARTIFICIAL GENERATION OF ROAD SURFACE TOPOGRAPHY BY THE INVERSE FFT METHOD

Techniques are presented for the digital simulation of the height profiles of a number of correlated parallel tracks and of an entire two-dimensional random road surface. It is shown that the profiles of a number of correlated tracks may be generated by using the one-dimensional discrete Fourier transform, but, in order to generate a fully isotropic surface, it is necessary to use two-dimensional Fourier transform methods and these are discussed in detail. A sample two-dimensional isotropic road surface is generated from an experimentally determined one-dimensional spectral density and its one-dimensional statistics are compared with those of the original displacement data. For the covering abstract of the conference see TRIS 395019. (Author/TRRL)

Media Info

  • Features: Figures; References;
  • Pagination: p. 29-42

Subject/Index Terms

Filing Info

  • Accession Number: 00395020
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • ISBN: 90-265-0461-6
  • Files: ITRD, TRIS
  • Created Date: Oct 31 1985 12:00AM