Learning Forum

[aisin3]

Hi,

I need a modal neutral file (mnf) for rigid-flexible analysis in ADAMS, and I'd like to generate the mnf in workbench. I got a method from youtube on https://www.youtube.com/watch?v=-6asFnUr0ac&list=PLhb3ITFxzLNaL35lNzeickBVia7fdfkoF&index. The method involves two main steps:

1. Set two remote points on the aeras which to be the rigid interfaces;

2. Use APDL to generate mnf, the core command is: 

RESUME

/units,si

/SOLU

nsel,s,node,,node1

nsel,a,node,,node2

adams,18

ALLSEL

/POST1

where node1 and node2 represents the Pilot Node APDL name.

Unfortunately,I didn't get "file.mnf" which I need, the content of "file0.err" is shown below:

 *** WARNING ***                         CP =       2.078   TIME= 226:10

 Element shape checking is currently inactive.  Issue SHPP,ON or         

 SHPP,WARN to reactivate, if desired.                                    

 

 *** WARNING ***                         CP =      19.547   TIME= 226:19

 The EMATWRITE,YES option does not currently support contact elements.   

 EMATWRITE,NO is reset.                                                  

 

 *** WARNING ***                         CP =      19.609   TIME= 226:19

 The Distributed ANSYS solution does not support substructuring          

 expansion pass analyses.  Distributed parallel processing will be       

 deactivated for this solution.                                          

 

 *** ERROR ***                           CP =      19.609   TIME= 226:19

 File genCMS.esav ( needed for element calculations ) does not exist.    

 

 *** ERROR ***                           CP =      19.609   TIME= 226:19

 The step data was checked and there were errors found.                  

  Please check output or errors file ( C:UsersTao                      

 LVDesktop_ProjectScratchScr5997file.err ) for messages.             

 

 *** ERROR ***                           CP =      19.609   TIME= 226:19

 File genCMS.esav ( needed for element calculations ) does not exist.   

So  I need guidance on this matter.

Thank you very much!

 

[Jannik99]

I have exactly the same problem. Do somebody find a solution?:)

[BenjaminLan]

I have exactly the same problem...(๑ó﹏ò๑)

[aryria]

your ansys version is old

and tge solution is to try to write ADAMS, 19 or something else

I can refer you to the article with url name below

I hope to help you

have good day

[aryria]

by the way

in some way ansys workbench cannot create .mnf file correctly the solution is to open Ansys mechanical APDL and open genCMS.db in it

and in the Solution>Adams connection> Export to Adams create your own .mnf file with user name. and in this way your mnf file can create correctly without any disaster

I hope to help you