I want to do a post buckling analysis with riks method. first I did a linear buckling analysis and now i want to write the results to a result file as a nodal data to do the geometric imperfections for riks analysis. does anybody know how I should do that?
In your eigenvalue analysis run, you need to request output to a .fil results file. You can then use those results using the *IMPERFECTION, FILE=xxxxx keyword in your riks analysis.
There is a good example of this type of analysis in the ABAQUS docs - "Buckling of an imperfection-sensitive cylindrical shell"
I think my first problem is that i don;t know where I have to write these commands. I use the command area which is at the same place of message area. is it correct?
thank You Martin
I added this one to the input file. nothing happened. I submitted the job again but the input file was rewritten. then I decided aybe I can import the edited input file as a model but this time I faced this error:
WARNING: The following keywords/parameters are not yet supported by the input file reader:
---------------------------------------------------------------------------------
*NODEFILE
*PREPRINT
*NODE FILE is not supported in CAE, so you'll have to write the .inp file out and edit it in a text editor (like Notepad). You then have to submit the job at the command prompt, not through CAE.
Open the ABAQUS command window in your working directory, then type;
I don't know how to thank you Martin. I finally made the .fil output. then I made my model for Riks analysis and I opened its input file with notepad and I added *imperfection, file=mylastfile
and then in abaqus command prompt I ran the new input file. then I imported it to abaqus for analysis. but imperfection didn't affect the results!!