run an analysis with a C/C++ user subroutine 1

[94710]

Dear all

I want run an abaqus simulation with a user subroutine written in C/C++.
I have downloaded one from abaqus online support system answer 737.

I modified my extension file from .c to .cpp. I add it to a Win32 empty project in Ms Development Environment 2003.For fixing a link warning , I modified in visco.cpp properties pages, debug information format=disabled.
I compiled it successfully.
In abaqus environment file, for fixing some link warning otherwise occuring during my abaqus execution, I add in link_sl parameter: '/nodefault:libcmtd.lib','/noentry'.

Here what I get trying to run my analysis

C:\Documents and Settings\alorenzom\Documenti\HC3FEM\AbaqusUSrI>abaqus -j visco_
dload -user visco.obj interactive
Old job files exist. Overwrite? (y/n): y
ABAQUS JOB visco_dload
ABAQUS Version 6.6-1
Begin Linking ABAQUS/Standard User Subroutines
5/29/2007 11:32:42 PM
Creating library standardU.lib and object standardU.exp
End Linking ABAQUS/Standard User Subroutines
5/29/2007 11:32:42 PM
Begin Analysis Input File Processor
5/29/2007 11:32:42 PM
Run pre.exe
ABAQUS License Manager checked out the following licenses:
ABAQUS/Standard checked out 5 tokens.
<13 out of 18 licenses remain available>.
5/29/2007 11:32:43 PM
End Analysis Input File Processor
Begin ABAQUS/Standard Analysis
5/29/2007 11:32:43 PM
Run standard.exe
ABAQUS License Manager checked out the following licenses:
ABAQUS/Standard checked out 5 tokens.
<13 out of 18 licenses remain available>.
5/29/2007 11:32:44 PM
ABAQUS Error: ABAQUS/Standard Analysis exited with an error - Please see the
message file for possible error messages if the file exists.
ABAQUS/Analysis exited with errors

C:\Documents and Settings\alorenzom\Documenti\HC3FEM\AbaqusUSrI>

and in msg file I find 'error user subroutine dload missing'


If it could be useful:I work on windows/x86-32.I have installed ms platform sdk 2003,Ms Visual Studio .net 2003,intel fortran compiler9.1.I run an abaqus analysis with a fortran user subroutine successfully.

Has any one got any suggestions for me?It would be very usefule for my work.

Thanks a lot in advance for your helpfullness.

 

[xerf]

Is any specific reason for which you want to complicate your life and not write the subroutine file in FORTRAN ?

 

[94710]

Yes he is my chief!

By the way, I just slightly modified my subroutine source code and I run my simulation successfully. I compare successfully some results in odb obtained from my simulation and those corresponding in odb obtained from simulation with fortarn user subroutine (that I downloaded from abaqus online support system answer 737 too).

All's well that ends well.

 

[xerf]

Bravo!

 

[94710]

Grazie! ma questo è un forum inglese!!

 

[xerf]

Con piacere.

 

[albert1981]

Dear 94710,

I want to ask you if with the fortran subroutine you can run several analysis changing change some parameters. How does it works?

thanks,
Albert

 

[94710]

Do you want to run with a single execution procedure more than one abaqus analysis jobs that are different only for some parameters, don't you?

Sorry I don't know how you can do this and if you could use fortran subroutine to do this.

I'm performing a study of convergence of a solution through mesh-refinement and I'm using a c++ code to generate all my input files and an ASI (abaqus scripting interface) script to run all related jobs.

Or perhaps you want to define a fortran subroutine with a parameter that you set in your input file?

By the way try to give more details about what you want to do so I or anyone can help you.

 

[albert1981]

Hi 94710,

What I am trying to do is simulate the propagation of a crack. I am taking a quarter of a plate and release the node changing the simmetry condition all the time. With fortran I modify the input file changing just the symmetry condition. then I run the simulation again with another symmetry condition and so on.
What I would like to do is to release some node from the symmetry (in order to simulate the crack growing) read the results from the *.dat file and the start again.
I saw your post and I was wondering if there is any fortran subroutine already implemented.

Thanks,
Albert

 

[94710]

Sorry I'm not able to help you about this.I have no experience about this.I hope someone can help you.Post a message with appropriate title and briefly all of your information.Good Luck!

 

[adindar]

Hello all,
I came across your mails while looking for the possibility of running ABAQUS solver for the parametric studies. And I would like to ask whether we aim the same, or not:
1- After creating a model in ABAQUS user interface, an .inp file is created.
2- This .inp file may be re-written with some variables which could be assigned by some programs such as fortran, MATLAB (my choice).
3- Then calling ABAQUS solver without using user interface and repeating the runs for any time the value of the variable is changed.

Am I wright in my expressions above?

If yes, let's seek the answer together.

Ahmet Anil Dindar

 

[xerf]

1. Yes, if by ABAQUS user interface you are referring to ABAQUS/CAE.

2. The inp. file is a text file describing the FE model using rules and keywords and can be (re-)written by an external program. In fact many people do not use ABAQUS/CAE and prefer to create the .inp file directly.

3. You can submit the .inp to the solver via command prompt, and yes, you can write a program to do that in a loop and to alter the .inp file during each iteration.