The exporting and importing of analytical data from your model is based on the analysis model, which is a non-graphical, logical grouping of member systems that you are going to send to an analysis and design program using a CIMsteel Integration Standard (CIS) file. Everything you do in Structural Analysis is based on analysis models.
You must create an analysis model before you can define load combinations or boundary conditions.
Analysis models appear on the Analysis tab of the Workspace Explorer. By default, the Analysis tab is not displayed in the Workspace Explorer. Click Tools > Options, and then select the General tab. In the Tabs to display in Workspace Explorer list, select the box next to Analysis. Save, exit, and reopen the session file to see the Analysis tab in the Workspace Explorer.
An analysis model has a fixed hierarchy of boundary conditions, load combinations, and members that belong to the analysis model. As you create boundary (support) conditions, loads, and load combinations, they appear underneath the respective categories on the Analysis tab.
Only member parts assigned to an analysis model are written to the CIS file. You assign member parts to the analysis model using a standard model filter. The filter looks for member systems, but it is the member parts of those filtered member systems that get assigned to the analysis model. This methodology ensures that intact member systems are written to the CIS file.
The filter is applied against the database to ensure that all member systems that pass the filter are found regardless of your current workspace definition. Remember that when a filter is associated to an analysis model, it is a picture of member systems that pass the filter at that time. As member systems are added or modified, the set of member systems that would pass the filter can change. You must re-apply the filter by modifying the analysis model to include and remove these members as needed. After you re-apply the filter, member systems with loads assigned to them that no longer pass the filter are removed from the analysis model.
You select (and therefore highlight in a view) all the members assigned to an analysis model by right-clicking on the Members folder and then selecting the Select Nested command.
Be sure to include objects on the Analysis tab when you define your workspace filter. Otherwise, your analysis model objects, except members, will disappear from the Workspace Explorer the next time you refresh your workspace. However, when defining your selection filter for the analysis model, make sure that you do not include any object on the Analysis tab of the New Filter Properties dialog box. Including objects on the Analysis tab in your selection filter causes all members with loads to be assigned to the analysis model whether they should be or not.