using nonlinear subcase for linear buckling
Altair EmployeeHello 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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This is possible with OptiStruct.Please refer attached document from OptiStruct user guide.
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.
Altair EmployeeWow!
Thank a lot, Guys!:)
I'll read and look at your attached files!
Altair EmployeeI've just tried to open file.
Sorry, could you resave file on HM 2017, or just send .fem file?
Altair Employeeperfect!=)
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.
Altair Employeeok=)
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).
Altair Employeeat first i'll try to check units=)
i think the same, results should be similar.
linear buckling (without nnl step) results are the same.
No idea?