Adams Advanced Package > Adams Flex > Building Flex Body Models > Load Case Selection

Load Case Selection

 
To Activate load cases
To Deactivate load cases
When you create a non-linear flexible body in Adams View, Adams View reads the Bulk Data File format (BDF) and reads the DLOAD, TLOAD1 and TLOAD2 entries from the Bulk Data section of this file.
DLOAD (Defined in the Bulk Data Section of the BDF file submitted to the Nastran Solver) stands for Dynamic Load Set Selection.
TLOAD1 and TLOAD2 define a time-dependent dynamic load or enforced motion for use in transient response analysis.
Dynamic load sets are selected in the Case Control Section with DLOAD=SID. In case there is no load cases selected, Adams will ignore this definition. TLOAD1 and TLOAD2 loads may be combined only through the use of the DLOAD entry. In Adams, only multiple TLOAD(1/2) bulk data entries can be combined using the DLOAD case control entry and the scale factor 1.0 is used in this case.
The following options are available in the Load Cases tab in the "Flexible Body Modify" dialog box for Non-Linear Flexible bodies:
1. Activate All: When this button is clicked, all the load cases read from the bulk data section of the input BDF file is selected for activation. We can only activate load cases that satisfy the criteria given below:
a. Multiple TLOAD(1/2) load cases can be selected, but cannot be combined with any DLOAD load cases.
b. If DLOAD load cases are selected for activation, we can select at the most one load case for activation.
On clicking Activate All if you get an error message, please click on the Select button to individually select load cases for activation that satisfy the above criteria.
2. Deactivate All: All load cases read from the bulk data section of the input BDF file are deactivated by default. If there are some load cases activated previously, clicking on the Deactivate All button will deactivate all load cases, during the Solver run.
3. Select: You can select individual load cases to be activated by clicking on the Select button. This will open the "Load Case Selection" dialog box.
If there are load cases read from the input BDF file, these will be displayed in the list on the left.

To Activate load cases

1. Select load cases from the list on the left by clicking on them. Alternatively, clicking on the Select All button will select all load cases.
2. Click on the "Activate→" button to activate the selected load cases. The selected load cases will be moved from the list on the left to the right.

To Deactivate load cases

1. Select load cases from the list on the right by clicking on them.
2. Click on the "←Deactivate" button to move all the selected load cases back in the list on the left.
 
Notes:  
1. To deactivate all selected load cases, you can also click on the Clear All button.
2. You can enter strings in the "Filter" field to look for certain load cases beginning with some characters. For example, if the Filter string is "DL*" or "D*", only DLOAD bulk data entries will be filtered in the list on the left.
3. If an invalid selection of load cases is made for activation, an error message is thrown.
4. Clicking on the Close button will close the "Load Case Selection" dialog box and mark all the selected load cases for activation in the "Modify Flexible Body" dialog box for Non-Linear flexible bodies. Clicking on the Apply button in this dialog box will mark these load cases for de-activation and will get written into the input file for the Nastran Solver when you run a simulation.