Correlate modes of symmetric structures

This example shows how to correlate modes of symmetric structures using mode clustering. Notice that multiple modes have almost identical frequencies.

Note:

Mode clustering is not available for an acoustic shape correlation solution process.

1. In the Simulation Navigator, right-click the Mode Pairing node and select Edit.

2. In the Mode Pairing Control dialog box, in the Mode Clusters group, select the Define Mode Clusters check box.

3. Click OK.The Mode Clusters node appears under the Mode Pairing node in the Simulation Navigator.

4. Right-click the Mode Clusters node and select Edit.

5. In theMode Clusters dialog box, from the Reference Modes and Work Modes list, select modes with similar frequencies which indicate repeated modes.

6. Click Create to cluster repeated modes.

7. Repeat the step 5 and 6 for all repeated modes in the Reference Modes and Work Modes lists.In this example, five clusters were created. The first cluster is composed of the work modes 9 and 10 and the reference modes 9 and 10.

8. Click OK.

9. In the Simulation Navigator, right-click the Mode Pairs[#] node and select Update.

10. In the Correlation Details View subpanel, right-click any mode pair and select Plot Mode Shapes.The clustered work mode shapes are always displayed using the test wireframe.

11. In the Correlation Details View subpanel, notice that:The clustered work frequencies are re-computed and their values are identical for each cluster.The Residual (%) Error column is populated for clustered modes. Low residuals are desirable. Errors near 100% indicate a poor correlation between work and reference solution results.

How do I

Display side-by-side modal results

Update mode pairs

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Mode pairing

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Correlate modes of symmetric structures, Simcenter 3D 2021.1 Series

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