Modal Assurance Criterion and Cross-Orthogonality Request
Description: Requests that Modal Assurance Criterion (MAC) and Modal Cross-Orthogonality (MXO) checks be performed.
Format:
Example:
CORRELATE( PLOT, MAC, CTOL 0.1) = ALL
| Option | Definition | Type | Default |
|---|---|---|---|
| Modal assurance data will be output to both the Model Results Output File and displayed graphically in the Autodesk Nastran Editor. | Character | ✓ | |
| PLOT | Modal assurance data will be output only to the Autodesk Nastran Editor. | Character | |
| MAC | Modal assurance criterion data output request. | Character | |
| MXO | Modal cross-orthogonality data output request. | Character | |
| MALL | Both MAC and MXO will be output. | Character | |
| CTOL | Off-diagonal output tolerance. See Remark 2. | Real ≥ 0.0 | 0.0 |
| ALL | Modal assurance data for all modes will be output. | Character | |
| n | Set identification of previously appearing SET command. Only modal assurance data for modes whose identification numbers appear on this SET command will be output. | Integer > 0 | |
| NONE | Modal assurance data will not be output. | Character | ✓ |
Remarks:
- This command is used to compare modal data from two different sources defined using the DATINFILE1 and DATINFILE2 Model Initialization directives. See Section 2, Initialization, for more information on DATINFILE1 and DATINFILE2.
- Output of off-diagonal Modal Assurance Criterion (MAC) and Modal Cross-Orthogonality (MXO) matrix terms will be suppressed if less than the output tolerance, CTOL.