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STAAD Commands and Input Instructions
Section 5
5-350
5.37.1.2 Define Harmonic Output Frequencies
If Harmonic is requested above, then optionally include the next
input.
FRE
QUENCY FLO f
1
FHI f
2
NPTS f
3
(MODAL) FLIST
freqs
FLO f
1
= Lowest frequency to be included in Harmonic output.
Default to half the first natural frequency.
FHI f
2
= Highest frequency to be included in Harmonic output.
Default to highest frequency plus largest difference
between two consecutive natural frequencies.
NPTS f
3
= Number of plot frequencies to be included between
natural frequencies. Defaults to 5 (7 if fewer than 10
modes) (3 if more than 50 modes). These points are
added to improve the graphic display of responses
versus frequency.
The natural and forcing frequencies are automatically included in
the plot frequencies.
MODAL = This option causes the natural frequencies between
FLO and FHI to be added to the list of forcing
frequencies.
FLIST freqs = List of forcing frequencies to be included in the
Harmonic analysis. Continue freqs input to additional
lines by ending each line except the last with a hyphen.
Only forcing frequencies will be used to create load case results
and print results.