*VARIABLE MASS SCALING
Required, mutually exclusiveparameters if the DT parameter or the TYPE=ROLLING parameter
is used:
FREQUENCY
Set this parameter equal to the frequency, in increments, at which mass scaling calculations are to
be performed during the step. For example, FREQUENCY=5 will scale the mass at the beginning
of the step and at increments 5, 10, 15, etc. The value of this parameter must be a positive integer.
NUMBER INTERVAL
Setthis parameter equal to the number of intervals during the step at which mass scaling calculations
will be performed. For example, if NUMBER IN TERVAL=2, m ass scaling calculations will be
performed at the beginning of the step, the increment immediate ly following the half-way point in
the step, and the final increment in the step.
Required parameters for TYPE=ROLLING:
CROSS SECTION NODES
Set this parameter equal to the number of nodes in the cross-sectionof the workpiece. Increasing
this value will decrease the amount of mass scaling used.
EXTRUDED LENGTH
Set this parameter equal to the average element length in the rolling direction.
FEED RATE
Set this parameter equal to the estimated average velocityof the workpiece in the rolling direction
at steady-state conditions.
There are no data lines associated with this option.
21.1–2
ABAQUS Version 6.1 Module: ID:
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