Incremental Dynamic Analysis
Incremental Dynamic Analysis
I'm working on Incremental dynamic analysis. I have trouble while running. If the scale factor is increased, a notification "time 8.2sec iter 32 -> divergent" and then the running stops. what does mean about "time 8.2s iter 32 -> diverg"? What should I do?
Thank you
Thank you
Re: Incremental Dynamic Analysis
Dear Deby,
You may carry out a search in this form with the 'divergence' term. You will find plenty of resources. Also there is a section in Appendix A in SeismoStruct's User Manual, called 'Tips to Solve Convergence Problems'.
You may carry out a search in this form with the 'divergence' term. You will find plenty of resources. Also there is a section in Appendix A in SeismoStruct's User Manual, called 'Tips to Solve Convergence Problems'.
Zoi Gronti
Seismosoft Srl.
Seismosoft Srl.
Re: Incremental Dynamic Analysis
I was read but haven't found what is the meaning of "iter" in detail. Please explain the meaning of "iter"? Why in the same time can enter different iter?
for example
time 3,7, dt = 0,05 iter : 18 -> converg
time 3,7000 dt = 0,05 iter : 32 -> diverg
for example
time 3,7, dt = 0,05 iter : 18 -> converg
time 3,7000 dt = 0,05 iter : 32 -> diverg
Re: Incremental Dynamic Analysis
Hi, I have question about it. Please explain this.. How to solve this issue?
Convergence not Achieved
Convergence Message: Diverge
-----------------
Displacement Norm: 0,00010653 / 0,0001
Rotation Norm: 0,02797784 / 0,0001
-----------------
Node 136: Norm of out-of-balance Deformations: 1,00
Node 91: Norm of out-of-balance Deformations: 0,95644739
Convergence not Achieved
Convergence Message: Diverge
-----------------
Displacement Norm: 0,00010653 / 0,0001
Rotation Norm: 0,02797784 / 0,0001
-----------------
Node 136: Norm of out-of-balance Deformations: 1,00
Node 91: Norm of out-of-balance Deformations: 0,95644739
Re: Incremental Dynamic Analysis
Dear Deby,
Iter means iterations, i.e.it is the number of iterations executed by the program in order to achieve convergence.
Have you tried the steps proposed in SeismoStruct's User Manual for the "Divergence" flag?
Iter means iterations, i.e.it is the number of iterations executed by the program in order to achieve convergence.
Have you tried the steps proposed in SeismoStruct's User Manual for the "Divergence" flag?
Zoi Gronti
Seismosoft Srl.
Seismosoft Srl.
Re: Incremental Dynamic Analysis
Yes, I have done it and succeeded in scale IDA 0.2-1 with each step 0.2.
But when the scale is increased to 1.2-1.4 with each step 0.2, the structure divergen. what caused it all?
But when the scale is increased to 1.2-1.4 with each step 0.2, the structure divergen. what caused it all?
Re: Incremental Dynamic Analysis
can i send the model that have done? Please check model..
Re: Incremental Dynamic Analysis
Dear Deby,
If you have tried all the proposed modifications, could it be that your structure cannot stand the applied load?
If you have tried all the proposed modifications, could it be that your structure cannot stand the applied load?
Zoi Gronti
Seismosoft Srl.
Seismosoft Srl.
Incremental Dynamic Analysis
Hi, I'm working on IDA using Seismostruct. I found a video on how to use IDA in Seismostruct. However, I do not know how to interpret the post-processing values and what are the needed data from Seismostruct for IDA curves.
Here's the sample video I found:
https://www.youtube.com/watch?v=BKvd7eDjEBw
Here's the sample video I found:
https://www.youtube.com/watch?v=BKvd7eDjEBw
- seismosoft
- Posts: 1199
- Joined: 06 Jul 2007, 04:55
Re: Incremental Dynamic Analysis
Which of the values you do not understand? If you not more specific in your question, we will not be able to provide any help.
In any case make sure that you have read the relevant section in IDA of the Users Manual. Also the paper indicated in the video will be extremely helpful (note however that this is not a video that has been created by Seismosoft).
Seismosoft Support
In any case make sure that you have read the relevant section in IDA of the Users Manual. Also the paper indicated in the video will be extremely helpful (note however that this is not a video that has been created by Seismosoft).
Seismosoft Support