In the Control parameter page, the user is allowed to set up basic parameters to control calculation. These parameters include Time step size, Selective mass scaling, Refining meshes, Output ascii file, etc. Control parameter setup interface is illustrated in Figure 8.3.87.
GENERAL
ACCURACY: Allows the user to set accuracy
levels. There are four levels, and different levels are corresponding to
different time steps, minimum element size and max. refinement levels. The time
step varies between -1.2e-5 and -1.2e-6 when moving the slider.
SELECTIVE MASS SCALING: Allows the user to determine
whether to use the selective mass scaling or not. If this option is selected,
the time step will be reset to -1.2e-005. Therefore, the user should toggle on
this option first, and then modify the time step.
TIME STEP SIZE: Allows the
user to set up time step size. Default time step size is -1.2e-6.
By clicking button, the program will automatically
calculate the time step size according to the element size and adaptive grade.
ADVANCED: Advanced setup for basic parameters. The
interface is illustrated in Figure 8.3.88.
Figure 8.3.87 Basic control parameter setup interface
Figure 8.3.88 Basic parameter advanced setup interface
ADAPTIVE MESHING
TIME STEPS (ENDTIME/ADPFREQ): Allow
the user to set the adaptive frequency (ADPFREQ). Default value is 40. Clicking
, the
program will automatically calculate the adaptive frequency according to tool
travel.
MINIMUM ELEMENT SIZE(ADPSIZE): Minimum element size to be adapted base on
element edge length. The default is 1.
MAX. REFINEMENT LEVELS (MAXLVL): Set
maximum allowable refinement level. Default level is 4, which mean a
square/triangular element is split thrice. For example, 1 square element is
split into 64 square elements using MAXLVL of 4.
EXCLUSION: The user is allowed to control the
adaptive meshing in tool travel, such as the remeshing of the rear closing
travel of
ADVANCED: Advanced setting for adaptive
meshing. The interface is illustrated in Figure 8.3.90.
Figure
8.3.89
Adaptive exclusion setting
Figure 8.3.90 Adaptive advanced parameters
OUTPUT ASCII FILE
The first column is used to control the output of database result files
and the second column is used to control the output time interval. If an interval
is not selected, the program will use the default time interval. The user may
input the time interval in the textbox. An example is illustrated in Figure 8.3.91.
Figure
8.3.91 Output ascii file setup
interface
LOAD
The user can click the Load button to load control parameter template. The
format of the control parameter template is *.dyn.