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WAVE
Optional parameters for TYPE=GRIDDED:
MINIMUM
Set this parameter equal to the elevation below which point the structure is fully immersed for
all time t. If this parameter is omitted, the elevation of the structure is com pared against the
instantaneous free surface to check for fluid surface penetration.
QUADRATIC
Include this pa rameter to indicate that quadrati c interpolation of the w ave data is used to determine
information between grid points. If this parameter is om itted, linear interpolation is used.
Optional parameter for TYPE=USER:
STOCHASTIC
Include this parameter to make t he intermediate configuration available to user subroutine UWAVE.
Set this parameter equal to a random num ber seed for use in stochastic analysis. If this parameter is
omitted or is included without a value, a default value of 0.0 is used for the random number seed.
This value is passed into user subroutine UWAVE. It is not used otherw ise by ABAQUS/Aqua.
Data line to define Stokes fifth-order waves (TYPE=STOKES):
First (and only) line:
1. Wave height, H.
2. Period of wave,
.
3. Phase angle,
, in degrees.
4. Direction cosines giving the direction of travel of the wave, d. In three-dimensional cases both
x-andy-components are needed; in two-dimensional cases only the x-component is used (in
that case +1 m eans the wave travels in the direction of x increasing, and −1 means a component
traveling in the direction of x decreasing).
Data lines to define Airy waves (TYPE=AIRY):
First line:
1. Wave component amplitude, .
2. Wavelength of this component,
(default), or wave period of this component, (if the
parameter WAVE PERIOD is used).
3. Phase angle of this component,
, in degrees.
4. x-direction cosin e defi ning the direction of the vector
(the direction of travel f or this
wave com ponent). In three-dimensional cases both x-andy-com ponents are needed; in
two-dimensional cas es only the x-component is used (in that case +1.0 means the wave travels
in the direction of x increasing, and −1.0 means a component traveling in the direction of x
decreasing).
22.1–2
ABAQUS Version 6.1 Module:
ID:
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