Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

RMS displacement in Nastran

Status
Not open for further replies.

NastranQ

Automotive
Joined
Sep 3, 2007
Messages
19
Location
RO
Hello All,

I am trying to plot the RMS displacement for a structure I am working on.
I am using the below output request to get it out of Nastran.
DISPLACEMENT(PLOT,RALL,NORPRINT)=1
Next I am importing the .op2 file in Altair's HyperView and I want to plot the RMS displacement, but it is not there. It only contains the results of the 1g sine analysis which is done prior to the random analysis.
The same deck works just fine for retriving the RMS stress by using STRESS(PLOT,CRMS,NORPRINT)=ALL.
Is this a post-processor (HyperView) issue or I am missing something?


 
Hello,

I have tried to load the displacement CRMS in HyperView with a model I have been working recently and it does not appear, as you said. I was obtaining the VM stresses, so I did not output the displacement results.

It seems to be a problem of HyperView, because the displacement RMS can be seen in the punch file (attached image), so maybe you can use this way. I really do not know much about HyperView postprocessing random analyses because I have been postprocessing these results with Patran, but I am trying to understand how HyperView works with the random data from Nastran.

If you finally overcome this problem with HyperView, please explain how.

I hope it helps.

 
 https://files.engineering.com/getfile.aspx?folder=7b949903-b8dd-4903-9f06-6b39c22510ee&file=Displ_RMS.jpg
Thank you! I think it is a limitation Hyperview has related to this.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top