Learning Forum

[DonFelton]

Hi,

I'm new to this Community but I've been working on this project for quite some time. I'm working with ANSYS APDL and I'm looking for a way to save the effects of loads acting on a body (like the thermal expansion of a body) in an MNF-File to create a Modal Force in Adams. Since the ADAMS-Macro of APDL generates the MNF-File by calculating the results of a CMS-File of the Model, I tried to include a thermal load in the CMS-Results according to "10.3 Sample Analysis Input" in the "Advanced Analysis Guide" by adding the following lines:

 - generation pass:

       - calculating the residual vector (RESVEC,on)

       - Apply load on nodes (BF,ALL,TEMP,temp_max)

 - use pass:

       - let the program output nodal forces in the use pass (ET,1,MATRIX50 and KEYOPT,1,6,1), but I think this just prints nodal forces to the output window

       - Calculate element results, reaction forces etc. (MXPAND,_NMODES,,,YES)

       - Apply load vector on Elements (SFE,ALL,1,SELV,1,1)

 - expansion pass:

       - Let ANSYS output all results to the .rst-File (OUTRES,ALL,ALL)

After calculating the results of the CMS-Files I start the MNF-Function (MNF,_NMODES,_NSTATIC,_KSTRESS,_UseCMS) to generate the MNF-File. Unfortunately, after importing the MNF-File in Adams it does not include any load cases that could be applied to the flexible body using the Modal Force Function of Adams.

Also if I try to add another load vector to the substructure by restarting the generation pass (ANTYP,SUBTRUCTURE,RESTART), the following Error Message occures:

" Segment numbering is incorrect.  Please send the data leading to this  
 operation to your technical support provider, as this will allow       
 ANSYS, Inc to improve the program."                              

My Script referring to this case can be found in the uploaded files.

 

Thanks in advance for your help!