Defines an amplitude curve (Time_curve in ParaGeo) in a comma separated value format with pairs of amplitude an pair values as follows:
Value 1
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Value 2
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Value 3
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Value 4
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...
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Value 2n-1
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Value 2n
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Time_1,
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Amplitude_1,
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Time_2,
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Amplitude_2,
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...
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Time_n,
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Amplitude_n
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Compulsory Parameters
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NAME
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Defines the name for the amplitude curve which can be used as an ID for assignment (e.g. to assign le amplitude curve to a specific load, etc).
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Optional Parameters
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TYPE
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Defines the curve type. Valid options are:
- TABULAR
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Definition of curve as a piece-wise function with linear interpolation between data points (Default).
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- S-CURVE
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Smooth interpolation between 2 data points following and S-shaped curve function. Note that this type is limited to 2 data points only.
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- CURVE-RAMP
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Defines a composite function formed by a curve which increases the load rate over the first 25% of the duration and ends in a lineal ramp.
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VALUE
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Defines whether the amplitude curve is provided as:
- ABSOLUTE
- RELATIVE
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Examples
*AMPLITUDE, TYPE=TABULAR, VALUE=ABSOLUTE, NAME=Curve1
0.0, 1.0, 1.0, 1.0
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1In this example a load is fully applied as a step load from time 0.0 Ma (amplitude = 1) and is kept constant from t=0.0 to t=1.0
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*AMPLITUDE, TYPE=TABULAR, VALUE=ABSOLUTE, NAME=Curve2
0.0, 0.0, 0.5, 0.2, 1.0, 1.0
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1In this example a load is applied firts with a slow rate during the first 0.5 Ma (20% of the load applied from t=0 to t=0.5 Ma) and then with a fast rate over the following 0.5 Ma (the remaining 80% of the load is applied from t=0.5 to t=1.0 Ma)
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*AMPLITUDE, TYPE=TABULAR, VALUE=RELATIVE, NAME=Curve3
0.0, 0.0, 0.5, 1.0, 1.0, -1.0
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1In this example a relative curve is used. The load is fully applied from t=0 Ma to t=0.5 Ma. Subsequently the load is fully removed from t=0.5 Ma to t=1.0 Ma,
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*AMPLITUDE, TYPE=S-CURVE, VALUE=RELATIVE, NAME=Curve4
0.0, 0.0, 1.0, 1.0
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1In this example a smooth S-shaped curve is used to interpolate from a magnitude of 0 at t=0 to a magnitude of 1 at t=1.
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