Discussion Groups

Simulation Mechanical and Multiphysics

Reply
New Member
Shane7779
Posts: 1
Registered: ‎04-04-2013

Re: analysis did not result in any stress results

04-04-2013 06:54 PM in reply to: HeylPatterson

I am having the same issue. It only shows the displacement and not the stress in the analysis. I tried saving my file in different locations but that didn't help. HELP PLEASE! How did you fix this?

 

Please use plain text.
Distinguished Mentor
AstroJohnPE
Posts: 514
Registered: ‎08-30-2012

Re: analysis did not result in any stress results

04-06-2013 09:20 PM in reply to: Shane7779
  1. What type of analysis are you running?
  2. What version of the software are you using?
  3. What error messages, if any, are given in the log file and summary file. (These can be viewed from the Report environment.)
John Holtz, PE
Mechanical Engineer
Pittsburgh, PA

16 years experience with Simulation Mechanical
Please use plain text.
New Member
BruceBlevins7336
Posts: 2
Registered: ‎02-08-2011

Re: analysis did not result in any stress results

04-28-2014 02:52 PM in reply to: HeylPatterson

Greetings:

 

The previous responsed did not help me - I have a similar proble to the ones already discussed.  Here is what I've done:

 

1.  I have a relatively simple flat plate with 6 holes.

2.  The constraints are fixed and are the interiors of the holes.

3.  I perform a modal analysis and get the frequencies

4.  Define a new scenario (random vib)  (all analysis is linear by the way)

5.  Edit the analysis parameters, have displacment data and stress data clicked, go on to the "Analysis Data" button

6.  Use modal results from scenario 1

7.  Set to g squared per Hz

8.  Cluster is clicked

9 Random vib input spectrum is "1-Input Spectrum 1, ID is 1, Title is "Input Spectrum 1"  (apparently all defaults)

10 PSD is in Z direction, no cross spectral densities selected

11. Entered the PSD, 20 Hz = 0.026, 50 Hz = 0.16, 800 Hz = 0.16, and 2000 = 0.026 (the list includes a blank line, cannot delete)

12.  Click OK, run the sim, get the message "The analysis of "blah blah blah" (the run file information).ds" did not result in any Displacement or Stress results!"

 

Note that the blah blah blah file information is long - my data is on a server and there are many characters including spaces in the folder location and the file name itself.

 

Hopefully you all have some suggestion that will get me back on track.

 

Thanks!

Please use plain text.
Product Support
andrew.sartorelli
Posts: 44
Registered: ‎10-08-2013

Re: analysis did not result in any stress results

04-29-2014 05:43 AM in reply to: BruceBlevins7336

Hi Bruce,

 

Some of the solvers in Simulation Mechanical are limited to ~120 characters for the path of the file. Could you try saving the file to location with a shorter path something like C:\Temp and see if that works? Also try removing any non-standard charcters that may appear in the path or filename, this would be characters like ø, æ, ß.



Andrew Sartorelli
Please use plain text.
New Member
BruceBlevins7336
Posts: 2
Registered: ‎02-08-2011

Re: analysis did not result in any stress results

04-30-2014 05:22 PM in reply to: BruceBlevins7336

I think I figured this our - I watched a tutorial on this analysis and learned that the simulation will not be a success unless there is sufficient mass participation.  I increased the frequency span of the modal analysis such that there were 20 modes calculated.  This increased my three orthogonal mass participations to be greater than 80 percent.  Now the random vibe sim works.

 

Question (I will also be looking on the nets):  What is meant by Mass Participation?

 

Cheers

Please use plain text.