Disp

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Jhno
Posts: 214
Joined: Sat May 05, 2012 2:55 pm
Location: Laval

Disp

Post by Jhno » Mon Jul 24, 2017 11:11 am

Hi,
I have the following problem. When I issue the following script to impose displacement at specified node in Transient analysis :
timeSeries Path 303 -time 1. -values 0.000386694
timeSeries Path 404 -time 1. -values 0.000692308
timeSeries Path 505 -time 1. -values 0.001
pattern MultipleSupport 2701 {
groundMotion 33 Plain -disp 303
groundMotion 44 Plain -disp 404
groundMotion 55 Plain -disp 505
imposedMotion 6802 1 33
imposedMotion 6807 1 44
imposedMotion 6812 1 55
}
setTime 0

Then I go with 15 analyze at 0.1 time increment (which get me at 1.5). Then When I plot the displacement of the node I imposed motion at, they don't move at all.
When I use the very same script, but use a time of 0.1 in the timeSeries Path command instead of 1.0 then it works and I get my displacement? Any clues on this? Thanks. (I should add that I did let the analyze dt at 0.1 in both case. When I change it to 0.01 to account for the timeSeries time values, I get the same problem).

selimgunay
Posts: 913
Joined: Mon Sep 09, 2013 8:50 pm
Location: University of California, Berkeley

Re: Disp

Post by selimgunay » Mon Jul 24, 2017 10:10 pm

Why do you want to use different dt values in the timeseries and the analysis?

Jhno
Posts: 214
Joined: Sat May 05, 2012 2:55 pm
Location: Laval

Re: Disp

Post by Jhno » Tue Jul 25, 2017 3:45 am

For convergence issues.
And the point is, as I understand, when the time of the model reach the time value in the path timeSerie, it should associate the corresponding value to the model... Am I missing something?

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