Search found 4 matches
- Wed May 04, 2016 7:48 pm
- Forum: OpenSees.exe Users
- Topic: BFGS Algorithm with VariableTransit Analysis
- Replies: 5
- Views: 4430
Re: BFGS Algorithm with VariableTransit Analysis
I did specify the-time option. My concern is that even though a warning is shown, when using the BFGS algorithm it seems that execution continues without any reduction in step size. Output from KrylovNewton algorithm when OS prints a warning indicating that the number of iterations has been exceeded...
- Mon May 02, 2016 9:05 am
- Forum: OpenSees.exe Users
- Topic: BFGS Algorithm with VariableTransit Analysis
- Replies: 5
- Views: 4430
Re: BFGS Algorithm with VariableTransit Analysis
The model runs fine, both for Gravity and earthquake loading. With a variable transient analysis I think that the algorithm cuts back after not reaching convergence and tries again until it converges. No problem there. The problem is that the recorder stores the results at a fixed time increment, an...
- Fri Apr 29, 2016 1:32 pm
- Forum: OpenSees.exe Users
- Topic: BFGS Algorithm with VariableTransit Analysis
- Replies: 5
- Views: 4430
BFGS Algorithm with VariableTransit Analysis
I am analyzing a frame using the BFGS algorithm and variable transit analysis. Regardless of the increment size I specify or the maximum number of iterations opensees always reports failure to converge after 10 iterations, and always reports the results in 0.01 second increments. This behavior diffe...
- Thu Jul 09, 2015 11:19 am
- Forum: OpenSees.exe Users
- Topic: Problem with ModIMKPeakOriented and ModIMKPinching materials
- Replies: 10
- Views: 12125
Re: Problem with ModIMKPeakOriented and ModIMKPinching mater
Same problem here. Works fine for gravity and pushover analyses, but not for dynamic analyses. Moment in the zero-length element does not match the elastic beam column element, and the deformations are much larger in the elastic member than in the zero-length springs. The difference in moments chang...