Nodal force report extraction

You can use results from a nodal force report as the working load in a margin of safety calculation. When you do so, you can obtain the nodal force report results from:

• An existing nodal force report.

• A nodal force report that you create while defining the margin of safety calculation.

The analysis results used to generate a nodal force report are the same as those that you select with the Load Extraction command. However, from the analysis results, the Nodal Force Report command allows you to create an equivalent force-couple representation of selected grid point forces and moments about an arbitrary point. You can then use a component of the equivalent force-couple representation as the working load in a margin of safety calculation.

You use the Nodal Force Report Extraction dialog box to select the nodal force report from which the software extracts a single result for each subcase in the nodal force report. The software calculates a margin of safety for each result. From the Nodal Force Report Extraction dialog box, you can also open the Nodal Force Report dialog box from which you can create the nodal force report from which to extract the results to use in the margin of safety calculation.

From the Nodal Force Report Extraction dialog box, you can also do the following:

• Select whether to extract force or moment results from the nodal force report and which component of the force or moment results to extract.

• Filter the results that are extracted.For more information, see Filtering options.

• Take the absolute value of the filtered results.For more information, see Absolute value option.

• Correct for any incompatibility between the dimensions and units of the nodal force report results and the results that the method requires.For more information, see Conversion box.

• Scale the results.For more information, see Factor box.

• Preview the values that the software uses in the margin of safety calculation for the working load.The values are the results from the nodal force report after the results have been sequentially filtered, made positive, corrected, and scaled.

Note:

When you extract results for the margin of safety calculation directly from the solution results, you can extract multiple values and then use the aggregation options that are present in the Load Extraction dialog box to reduce the values to a single value that the software uses in the margin of safety calculation.

When you extract results for the margin of safety calculation from a nodal force report, you can only extract a single value for each subcase from a nodal force report. Because the aggregation options that are present in the Load Extraction dialog box are not present in the Nodal Force Report Extraction dialog box, if the nodal force report contains multiple values for each subcase, in the Nodal Force Report Extraction dialog box, you must select the Add all Forces and Moments check box.

The results from the nodal force report that the software uses in the margin of safety calculation depend on:

• The load case set that is selected in the Calculation Creation dialog box.

• The solution step that is selected in the Nodal Force Report dialog box.

For example, suppose your solution contains two subcases from which you create three load case sets:

• Set 1 contains the results from subcase 1.

• Set 2 contains the results from subcase 2.

• Set 3 contains the results from subcases 1 and 2.

The following table shows which results the software extracts for each solution step setting in the Nodal Force Report dialog box.

Solution step setting	Load case set	Results extracted
First	Set 1	Subcase 1 only
Set 2	No result extracted
Set 3	Subcase 1 only
Last	Set 1	No result extracted
Set 2	Subcase 2 only
Set 3	Subcase 2 only
All	Set 1	Subcase 1 only
Set 2	Subcase 2 only
Set 3	Subcase 1 and 2

For information on nodal force reports, see Nodal force reports.

Where do I find it?

Application	Pre/Post
Prerequisite	An active margin of safety solution
Simulation Navigator	Calculations node→right-click a calculation→Edit
Location in dialog box	Calculation Creation dialog box→Inputs group→Inputs tab→→Nodal Force Report →Edit Nodal Force Report

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Nodal force report extraction, Simcenter 3D 2021.1 Series

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