enforced displacemnt in a local csys with NLGEOM - possible bug

Can you try this in the latest version OptiStruct 2018.0.Lot of new feature has been changed since version 14.0.We now solve Nlgeom with large displacement analysis.

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Hi,

thanks for your answer, I tried to solve with Optistruct 2017, unfortunately occours the same problem....We don't use Optistruct 2018 at the moment.

Regards,

Szilard

can you share the files of 2017 version.

Hi Rahoul,

here are the results when I run the same input files under Optistruct 2017.

My problem is that the same pretension lodcase (enforced displacements in a local csys) produces different results whether there is a follower loadcase or not.....

Regards,

Szilard

<?xml version="1.0" encoding="UTF-8"?>

can you share the .fem file setup using 2017 version.

Hi,

I used the same fem file which I used for the Optistruct 14 run (see atached files from my first post), I only used the Optistruct 2017 solver (since I want to do the same analysis ) .... Is it wrong doing so ?

Regards,

Szilard

Hi Rahoul,

did you find out something about this Optistruct bug? Is there really no solution for this problem? How can I perform this analysis in an another way?

Regards,

Szilard Balazs

You can refer attached sample deck from OS example guide. OS-E: 0135 Contacts and Pretensioning of Bolts

<?xml version="1.0" encoding="UTF-8"?>

Unable to find an attachment - read this blog

Hi Rahul,

thank's a lot for your help!

Reagrds,

Szilard Balazs