using nonlinear subcase for linear buckling

No idea?

This is possible with OptiStruct.Please refer attached document from OptiStruct user guide.

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Hi,

it is possible to use nonlinear quasistatic analysis as a preload for linear buckling analysis (see attached model). From Optistruct help:

A linear buckling solution cannot be performed on a linear static subcase that uses inertia relief. STATSUB(BUCKLING) can only be used to reference buckling to linear static or nonlinear static (small displacement + N2S/S2S contact only) subcases. For more information in using a preloaded linear static analysis (with STATSUB(PRELOAD) pointing to large displacement nonlinear analysis), in buckling analysis, refer to Linear Buckling Analysis in the User Guide.

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Wow!

Thank a lot, Guys!:)

I'll read and look at your attached files!

@Hyperman

I've just tried to open file.

Sorry, could you resave file on HM 2017, or just send .fem file?

Glad to help.

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@Hyperman

perfect!=)

it works!

my mistake was that i had used static nonlin-geom.)

where did you find in UsGuide part about it feature?

That document is from Reference Guide>Input Data>Subcase Information Section>STATSUB. 

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ok=)

thank a lot.

interesting, but i have different result from abaqus. ) the rate is 2.

You're welcome.

The results should be similar. Which model are you referring to? Compare analysis set-up in both solvers (unfortunately I do not use Abaqus).

at first i'll try to check units=)

i think the same, results should be similar.

linear buckling (without nnl step) results are the same.