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 SIZEADPSIZE: 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 5mm, as illustrated in Figure 8.3.89.

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.