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using nonlinear subcase for linear buckling

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Hello all!

i have one question!

is it possible in Optstrct to do these thing?

i want to use nonlinear analysis (preload by weight) for linear buckling analysis/

any idea?

thank a lot, Guys!

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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:

Quote

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.

 

 

NLASTAT+BUCKLING.hm

Rahul R and Mrt like this

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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).

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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.

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