Program to export a "Modal Neutral File"

[philiplong]

Hi everybody,

I have to upgrade an Adams View Simulation to include a flexible object instead of a rigid one. Adams-Flex requires a "Modal Neutral File" MNF, that is exported from a finite element package (Nastran, Ansys , Abaqus etc. ). However I don't have access to any of these at the moment.

I have CatiaV5 but I don't believe its possible with this program, otherwise I wonder if there is any freeware readily available to do it?

Any ideas would be appreciated.
Kind regards
Philip

 

[rb1957]

i think you need a pre-/post-processor like Patran, FeMap, etc to generate the neutral file. i know Nastran doesn't create a neutral file, not sure about Ansys, etc. alittle surprised that catia doesn't (as part of it's FEA).

 

[GregLocock]

Nastran does export MNFs, that's where I get them from.

http://simcompanion.mscsoftware.com...uestion_box=modal+neutral+file&ichbox[]=en-US

There's no particular reason why you need a high end package to create them, just get the file spec from MSC and then write a translator in fortran (trust me).





Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[rb1957]

i stand corrected ! (again !!)

but i don't think catia exports their model file ... maybe you can get it to print out a text version, which you can reasonably quickly edit/reformat with word (or fortran). i thought catia's analysis was pretty much internal.