Identifying results contribution for envelope displays

When you create results envelopes, you can select the Output ID Results check box in the Results Envelope dialog box to generate additional results sets that map the envelope values at nodes or elements to the components and locations of the iteration, load case, mode, or time step that contributed the specified result. For example, by comparing the ID results to the enveloped results, you can quickly identify which component in an iteration contributes most significantly to areas of interest in your model. An Information window provides a lookup table of load case IDs and results. The following shows the Information window with the results of two envelope operations.

The results IDs generated depend on the type of approach you specified in the Results Envelope dialog box.

• Through Load CasesWhen you set Approach to Through Load Cases and select to output additional results sets, the envelope operation creates a matched ID result set for each results envelope. For example, if you select to envelope the Displacement for the X and Y components for each load case and output the results ID, the software generates a result set for each component.Each load case includes an ID to help you find the maximum or minimum value by those IDs.

• Through Load Cases and ResultsWhen you set Approach to Through Load Cases and Results and select to output additional results sets, the envelope operation creates a matched ID result set and a load case ID for each envelope. For example, if you select to envelope the Displacement for the X and Y components for each load case and output the results ID, the software generates a load case and a result set.For 1D, 2D, and 3D elements, the same result type can be separated into three result IDs.

Example: Identifying stress contributions for multiple load cases

The following figure compares a Von Mises stress envelope for three load cases to the ID results for that envelope. Note that in the ID results display, the color bar scale has been set to three levels. These correspond to the three load cases. The integer values in the color bar correspond to the ID assigned to each selected load case in the Results Envelope dialog box.

In this example, you would interpret the ID results display as follows:

• Maximum stresses for the blue elements are contributed by load case 1.

• Maximum stresses for the green elements are contributed by load case 2.

• Maximum stresses for the red elements are contributed by load case 3.

Tips and techniques

In the Results Envelope dialog box, the unique ID assigned to each selected component is listed in the first column of the component list, titled No. You can right-click a selected component and choose Edit to modify its component ID. IDs must be unique integers. Assigning a more meaningful integer value to component IDs may be useful when interpreting results. For example, if you are viewing an envelope of transient results for the first, fifth, and eleventh time step, you may want to assign the IDs 1, 5, and 11, respectively.

When post-processing ID results, set the number of levels in the color bar to match the range of IDs. This is useful for matching the assigned color to the component ID.

How do I

Save a results envelope to a field

Export a results envelope to a UNV file

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Identifying results contribution for envelope displays, Simcenter 3D 2021.1 Series

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