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Messages - STOKLJOS

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1
Uncertainty Quantification (quoFEM) / QUOFEM offline?
« on: May 23, 2022, 05:38:58 PM »
Hello,

I was trying to run the quofem desktop application this weekend but everytime I submitted a job it says status is blocked. Is the application currently offline? If so when is it expected to come back online?

Thanks,

Josh S.

2
Uncertainty Quantification (quoFEM) / Re: QuoFem Parameter Estimation
« on: January 07, 2022, 11:05:15 PM »
Hello,

Thank you for your reply. I also noticed the large difference in max strength. This is due to the error function looking at largest loads when pushed in the opposite direction as well as the normal direction. I fixed that so the output is always positive but still running into the same local minima solution so I will try the steps you laid out.

Thanks again,

Josh

3
Uncertainty Quantification (quoFEM) / QuoFem Parameter Estimation
« on: January 06, 2022, 11:23:03 PM »
Hello,

I have been using the parameter estimation for an opensees model and it seems to not yielding the best results. For instance look at the output of the dakotaTab.out; the parameters are varying by 1e-4 and the best parameter picked is 30 kips over the experimental value. I am currently using a convergence tolerance of 0.0001 and max iterations of 1000. The parameters also have a healthy lower and higher bounds on them (ie stc has lower of 0.01 and higher of 1).

 I am wondering why the simulation is yielding results after 7 evaluations and not varying the parameters more to hopefully converge to a closer result.

Thanks,

Josh




%eval_id  interface stc                srs            shr                  MaxStrength   
1        NO_ID     0.3                   0.33           1                     -159.9473689   
2        NO_ID     0.3001011366   0.33           1.000231482    30.27846112   
3        NO_ID     0.3001254848   0.33           1.000312594    -158.1980189   
4        NO_ID     0.3001035714   0.33           1.000239593    -153.3980689   
5        NO_ID     0.3001013801   0.33           1.000232293    -159.5161689   
6        NO_ID     0.300101161    0.33           1.000231563    -155.7201689   
7        NO_ID     0.3001011391   0.33           1.00023149     -157.0393689

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