Manage Load Cases

Create load cases to define sets of loads, supports, and other entites that act on a model.

Before running an analysis or optimization, you need to define at least one load case for your model. You may also want to create multiple load cases with different loads and displacements to understand how this impacts the results of an analysis or optimization.



Figure 1. The Model Browser

All of the loads and supports, displacements, accelerations, and temperatures in a model are shown in the Model Browser in a folder called All Loads and Displacements. (This folder only appears once a load or support has been applied to the model.) The folders for each load case list only those that are active for the particular load case.

You can create load cases and assign individual loads, supports, etc. to each using the right-click context menu. Any load or displacement can be included in multiple load cases, and therefore may appear multiple times in the Model Browser.

Tip: You can also use the List Load Cases table, accessed by clicking the icon, to organize loads and displacements.

Create Load Cases

Create and manage load cases using the Model Browser.

  1. Press F2 to open the Model Browser.
  2. Choose from the following options:
    To Do this Note
    Create a load case Right-click a load or displacement, and then select New > Load Case. The new load case is automatically made the current load case.
    Set the current load case Right-click a load case, and then click Current. The current load case is show in bold. When you create a new load or displacement, it is automatically assigned to the current load case.
    Rename a load case
    • Click a selected load case and then type a new name.
    • Right-click a load case, and then click Rename.
     
    Isolate a load case Right-click a load case, and then click Isolate Loads and Parts. This option will isolate all loads and parts in the selected load case in the modeling window, hiding all others.
    Delete a load case Right-click a load case, and then click Delete. If you delete a load or displacement, it disappears from every load case and the All Loads and Displacements folder.
    Copy and paste a load case Right-click a load case, and then click Copy.

    Right-click again, and then click Paste.

     

Include or Exclude Entities from Load Cases

Include or exclude entities from a load case.

  1. Press F2 to open the Model Browser.
  2. Right-click a load or support, and then click Include/Exclude from > [relevant load case(s)].


    Figure 2. Model Browser Context Menu
Tip: Avoid placing more than one support on any one face, edge, or point in the same load case. (It's fine to have multiple supports on a face, edge, or point as long as they are separated into different load cases.) If this happens, you will be asked to exclude all but one of the redundant supports in the load case when you run an optimization.

Move Entities Between Load Cases

Move or copy an entity from one load case to another.

  1. Press F2 to open the Model Browser.
  2. Drag and drop loads, supports, displacements, accelerations, and temperatures in the Model Browser from one load case to another with the left mouse button. The cursor will show a symbol if you try to drop the objects on any invalid location within the browser.
Tip:
  • To create a copy of the dragged object rather than moving it, hold down the Ctrl key while dragging the left mouse button.
  • If you drag a load or displacement from the All Loads and Displacements folder to a load case, it remains in the All Loads and Displacements folder, since this folder lists all of the loads and displacements in your model.