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Femap not loading analsys results.

Experimenter
Experimenter

Hi Folks,

 

After running an analysis the results don't always load into Femap.  The analysis monitor will say analysis complete but then more often than not it grinds to a halt on anything but the most basic models.  Any suggestions greatfully recieved,

 

Clive

4 REPLIES

Re: Femap not loading analsys results.

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Clive,

Post here your failed FEMAP model and we will take a look to it.

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Femap not loading analsys results.

Phenom
Phenom

Hi Clive,

 

Are you new to Femap or FEA, or are you experienced with one or both?

 

If the analysis monitor says the analysis is complete, but no results are loaded, then the most common reason is a modelling problem...

eg. singularity from insufficeint constraint or insufficeintly connected mesh;

mesh quality so bad that the elements do not pass the required diagnostics (eg. very large element size selected for geometry with tiny unsuppressed features);

"null" problem such as no constraints or loads selected in the analysis setup;

subtle technical problems like dependent nodes of rigid elements also being constrained

 

More serious technical problems can occur like running out of disk space, or the Nastran scratch directory is set to a non-existent location.

There are 1001 different ways that modelling problems can occur.  The good news is that Femap and NX Nastran are so robust, that 99.9% of the time there is a real reason why the problem occurred.  Having been involved in various FEA packages, it's nice to use something where it's virtually always possible to diagnose a good reason for a problem.  So, if it "grinds to a halt" it won't be some random bug.

 

To help you diagnose problems, you should always know where the analysis files (.log, .f06, .f04 text files ) are going.  If the .f06 file is created open it in a text editor (not Word), and search for the word FATAL, or WARNING.  

If the .f06 file is not created, the first thing to check is that the Nastran scratch directory is still present (typically C:\scratch - but was set when you installed Femap).  Also, if the creation of the .f06 is erratic, then I suggest you start using a shorter directory path for your files, and keep the model names simpler (Letters, numerals, underscores - commencing with a letter).  There is a fair amount of scope beyond those characters, but there are a collection of Femap & Nastran operations which require file & directory names & lengths to be "reasonable".

Re: Femap not loading analsys results.

Experimenter
Experimenter

Hi Guys,


I'm new to both FEA and Femap. I use Pro E for zinc die casting tool design and I'm looking to broaden my horizons so I'm working through an online course on FEA and have Femap on a free trail license to try and replicate what I've been shown on the course.


I’d spotted the references to f04 & f06 in the analysis monitor but had no idea what they represented, however I now understand their significance, have located them and managed to load the analysis results into Femap manually by selecting File, Import, Analysis Results… and all is ok!


EndZ, thank you for your sound advice and pointing me in the right direction. Blas, I may well take you up on your kind offer to checking out a failed model in the not too distant future.


Kind Regards,


Clive

Re: Femap not loading analsys results.

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

Dear Clive,

If you are new in FEMAP please make sure the FILE > PREFERENCES is defined correctly, this should be your first step in FEMAP. To learn more visit my WEB site in the following address:

http://www.iberisa.com/soporte/femap/femap_tips_tricks_preferencias.htm

 

Amount others make sure to activate the option AUTOMATICALLY LOAD RESULTS under FILE > PREFERENCES > INTERFACES, OK?.

 

preferences-load-results.png

 

Enjoy FEMAP!!.

 

Best regards,

Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/