topic Re: No convergence of nonlinear problem! Very Simple model in Robot Structural Analysis Forum

No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 13:40:15 GMT

Hey

My first and very simple 2D Frame in ROBOT.

I get the No convergence of nonlinear problem error when analysis. It is part of my 2. semester project. All is calculated by hand, and i am just trying to see if i can get the same, or just about, results in ROBOT.

The model is attached.

Regards

Sune

Re: No convergence of nonlinear problem! Very Simple model

Artur.Kosakowski — Thu, 27 Nov 2014 15:14:26 GMT

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

Re: No convergence of nonlinear problem! Very Simple model

Rafacascudo — Thu, 27 Nov 2014 15:14:27 GMT

Do you really need to use a cable element for the diagonals , or just a "tension only" bar?

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 16:11:16 GMT

Thanks. I never would have figured that out. Fast and sweet support 🙂

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 16:12:37 GMT

Rafacascudo i guess that would do just as well. Can you point me in the direction as to where i select "tension only" for my diagonal bar?

Re: No convergence of nonlinear problem! Very Simple model

Rafacascudo — Thu, 27 Nov 2014 16:29:00 GMT

define as a standard bar element and ...

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 16:41:07 GMT

Thx. Its a steep learning curve. Day 1 with robot 🙂 Your help is much appreciated!

Re: No convergence of nonlinear problem! Very Simple model

Rafacascudo — Thu, 27 Nov 2014 16:56:15 GMT

Although ,after 15 years (v13.5) of practice and still learning, it´s Not so steep! Maybe the easiest one to learn and operate by far!!

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 17:25:49 GMT

Then perhaps you can give me pointers as to how i make my results simple and slick. As for now, we need to compared out hand calculations / dimensioning with a ROBOT analysis.
i would like to get a detailed result for bar nr.4. I will post a result of my best shot so far

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 17:30:54 GMT

Or for a single bar this is what i can do

Re: No convergence of nonlinear problem! Very Simple model

Rafacascudo — Thu, 27 Nov 2014 18:59:22 GMT

select the bar you want the results ,then click on menu results/Detailed analysis...

or you can have it also through tables . Right click anywhere / tables.../Forces

and if you need more information in your tables , right click anywhere on table area and click on table columns

Re: No convergence of nonlinear problem! Very Simple model

Anonymous — Thu, 27 Nov 2014 21:11:06 GMT

I will give it a try after i get some sleep. Thanks Raf