-
Choose Tabular to define the amplitude curve
as a table of values at convenient points on the time scale.
Abaqus
interpolates linearly between these values, as needed. For more information,
see
Defining Tabular Data.
-
Choose Equally spaced to give a list of
amplitude values at fixed time intervals beginning at a specified value of
time.
Abaqus
interpolates linearly between each time interval. For more information, see
Defining Equally Spaced Data.
-
Choose Periodic to define the amplitude,
a, as a Fourier series:
where ,
N, ,
,
,
and ,
,
are user-defined constants. For more information, see
Defining Periodic Data.
-
Choose Modulated to define the amplitude,
a, as
where ,
A, ,
,
and
are user-defined constants. For more information, see
Defining Modulated Data.
-
Choose Decay to define the amplitude,
a, as
where ,
A, ,
and
are user-defined constants. For more information, see
Defining Exponential Decay.
-
Choose Solution dependent to calculate
amplitude values based on a solution-dependent variable. For more information,
see
Defining a Solution-Dependent Amplitude for Superplastic Forming Analysis.
-
Choose Smooth step to define the amplitude,
a, between two consecutive data points
and
as
where .
For more information, see
Defining Smooth Step Data.
-
Choose Actuator to import the current value
of an actuator amplitude at any given time from a co-simulation with a logical
modeling program. For more information, see
Defining an Actuator Amplitude via Co-Simulation.
No additional data is required to define the amplitude curve.
-
Choose Spectrum to define a spectrum to be
used in a response spectrum analysis. For more information, see
Specifying a Spectrum.
-
Choose User to define the amplitude curve in
user subroutine
UAMP (Abaqus/Standard)
or
VUAMP (Abaqus/Explicit).
For more information, see
Defining an Amplitude via a User Subroutine.
-
Choose PSD definition to define a frequency
function that defines the frequency dependence of the random loading in a
random response analysis step. This amplitude curve represents the power
spectral density function for the random noise source. The
PSD amplitude can be referenced in the
correlation definition of a base motion boundary condition in a random response
step. For more information, see
Defining the Frequency Functions.