Buckling optimization

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Im tyring to do a buckling free-sizing optimization - I have constraints of buckling and stress with an objective to minimize massfrac. I went throught the tutorial on free sizing (OS-4050), but I'm a little confused which modes are considered for the optimization. I have 1 buckling response (with mode number: 1).  When I created the load collector, ND = 10. I also selected 'MAXBUCK' under opticontrol. The tutorial suggested this consideres the lowest 10 modes, is this correct?

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2015

    Hi davewalker348

     

    MAXBUCK Controls maximum number of buckling eigenvalues to be considered for each buckling subcase in the optimization problem.  If ND=15 is given in EIGRL, then only 10 buckling modes are considered for the optimization provided MAX_BUCK is set to 10.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2015

    Ok, so even if I have only one response, which has a 'buckling mode' entry, I consider the number of modes ND is set to (as long as its less than or equal to MAX_BUCK)?

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