| E5099 | WARNING: E5099 | CONVERTING MODAL DAMPING TO STRUCTURAL FOR SPCD ENFORCED MOTION |
| Cause: | A modal frequency response analysis was performed with direct enforced motion (SPCD) and modal damping specified. The modal damping was automatically converted to equivalent structural damping. | |
| Action: | If modal damping is required versus structural damping, use large mass enforced motion. | |
| Remarks: | See Autodesk Nastran User's Guide, Section 7.4, Enforced Motion, for more information on large mass enforced motion in frequency response analysis. |