OS-E: 6010 Rotor Unbalance using Modal Frequency Response Analysis
This example is used to find the unbalance frequency in the Rotor using modal frequency response analysis in OptiStruct.
![](../../../images/solvers/rotor_dynamics_modal_complex_eigenvalue_fe_model.png)
Figure 1. FE Model
Model Files
Refer to Access the Model Files to download the required model file(s).
- RD_MRF.fem
- RD_MFR_Unbal.fem
Model Description
FE Model | 1D Elements |
|
Material | Material MAT1 | Rotor:
|
Reference Guide Entries | Keywords | RGYRO, ROTORG, RSPINR, DDVAL, DLOAD, DAREA, UNBALNC, DPHASE, RLOAD2, FREQ1, EIGRL |
Results
- Subcase
- 1st Peak Frequency
- DLOAD
- 422.60 Hz
- Unbalance Force
- 422.60 Hz
![](../../../images/solvers/rotor_dynamics_unbalance_displ_vs_freq_plot.png)
Figure 2. Displacement versus Frequency Plot at the Grid #5