Thread: How to choose frequency for structural analysis

On 06/11/2014 08:29 PM, Cuiyan Kong wrote:

Hi friends,

I am trying to obtain the accelerogram by removing the instrument response which need to be defined the freqlimit. May I know how to select the freqlimit for structural analysis? Any help would be appreciated. Thanks a lot.


Tracy


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Dear Tracy,

Have you plotted some spectra of typical traces to see
what the usable bandwidth of your data is? Use:

rmean
rtrend
taper
fft
plotsp

(or keepam then plot1 instead of plotsp)
(you might find the spectra better to view if you
issue "loglog" before the plot commands, to get
logarithmic scales on both axes).


Regards,
Sheila Peacock.