Requests the unbalance response calculation option and defines the analysis spin speed range. The spin speeds on this card (code 95.) are multiplied by the spin ratio for each beam to determine the spin speed for each beam for the unbalance response calculation.
Whirl frame and fixed frame analysis
Following is the screen dump from the roda input file on this card (code 95.0).
For a spin speed range starting at 1000.0 rpm and ending at 3000 rpm with 1000 rpm.
Code 81.0 establishes analysis reference frame. So the field FRM (value is zero) under code 81.0 specifies whirl frame. Code 92.0 defines values of iteration control variables for use with non-linear support when performing a steady stae analysis.
Out of these two analysis frame whichever frame is last selected will be written out inside the roda input file. Cards for both frames will not be written out in the roda input file.