_s#_a.frf file
The _s#_a.frf file is an OptiStruct ASCII format results file.
File Creation
This file is only created for frequency response subcases. Creation of this file is controlled by the I/O Option OUTPUT.
File Contents
- Result
- Description
- Acceleration
- Acceleration results from frequency response analyses.
File Format
If the real and imaginary format was selected on the ACCELERATION card, the
file starts with the following header:
| Frequency"REA | X Trans"IMA | X Trans"REA | Y Trans"IMA | Y Trans"REA | Z Trans"IMA | Z Trans |
If the phase and magnitude format was selected on the ACCELERATION card, the
file starts with the following header:
| Frequency"PHA | X Trans"MAG | X Trans"PHA | Y Trans"MAG | Y Trans"PHA | Z Trans"MAG | Z Trans |
In either case the results are grouped by node with results for different nodes separated by a
blank line. The format of each line after the header is:
| Frequency | X-rl/ph | X-im/mag | Y-rl/ph | Y-im/mag | Z-rl/ph | Z-im/mag |
- Data
- Description
- Frequency
- Frequency at which results are calculated.
- X-rl/ph
- Is either the real component in the x-direction or the phase angle in the x-direction component.
- X-im/mag
- Is either the imaginary component in the x-direction or the magnitude in the x-direction component.
- Y-rl/ph
- Is either the real component in the y-direction or the phase angle in the y-direction component.
- Y-im/mag
- Is either the imaginary component in the y-direction or the magnitude in the y-direction component.
- Z-rl/ph
- Is either the real component in the z-direction or the phase angle in the z-direction component.
- Z-im/mag
- Is either the imaginary component in the z-direction or the magnitude in the z-direction component.
Comments
- The # in the file name is the user-defined subcase ID from which these results are obtained.
- The _freq.mvw HyperView script file automatically creates plots for the results contained in this file.