cafwd3.m

NAME
SYNOPSIS
DESCRIPTION
INPUT
OUTPUT
SEE ALSO
BUGS
COPYRIGHT
AUTHOR

NAME

OCTAVE cafwd3.m - Perform Kelvin-Voigt forward computation given stiffness and damping values

SYNOPSIS

cafwd3 prompts for:

Choose to compute with observed data for comparison or not (GUI Click Box)
IF WITHOUT DATA
User enters stiffness, C1 (m^2/s^2), and damping, C2 (m^2/s) (GUI Entry Box)
LOOPS for additional parameter choices and computes plots
of phase velocity (m/s), decay (1/m), and Q (unitless) vs frequency.
ELSE
Assuming bvas.his and bamp.his are available (from bvas and bamp runs)
Prompts for 2 mouse clicks selecting a frequency range (low to high frequency)
This permits an estimate for initial C1 and C2 from the data. (GUI Entry Box)
LOOPS for additional parameter choices and computes plots
of phase velocity (m/s), decay (1/m), and Q (unitless) vs frequency.
END

DESCRIPTION

Basic Seismic Utilities (BSU) program run in Octave or Matlab. Within an octave session, type cafwd3 and a GUI pops up as shown above. One either computes the forward problem, displayed against results from a down-hole survey (requires two files, bvas.his and bamp.his), or just computes the forward problem with no data comparisons. This computation is in the context of dispersive body waves (transmission measurement) under the Kelvin-Voigt representation.

INPUT

Requires two files from execution of bvas and bamp programs ONLY if "with data" selected.
bvas.his
bamp.his

OUTPUT

Plots of phase velocity, decay, and Q, as a function of frequency under Kelvin-Voigt representation
of transmission of body waves.

SEE ALSO

bamp(1) bvas(1) caplot(1) caplot3.m(7) cainv3.m(7)

BUGS

No known bugs.

COPYRIGHT

Copyright © 2024 by Paul Michaels

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

AUTHOR

P. Michaels, PE. <paulmichaels@.boisestate.edu>