"There are more number of degree of freedoms with double dependency than the number of independent degree of freedom"

Alessia
Alessia Altair Community Member
edited June 2022 in Community Q&A

Hi everyone,

I'm trying to:

  1. increase temperature (+40 °C) on the surface of the component
  2. maintain a constant distance between the two circles

How would you do that in a linear static analysis?

I've attached the file that I worked on "staffa_3". It gives me the error "There are more number of degree of freedoms with double dependency  than the number of independent degree of freedom".
Furthermore I'm not even sure that I've set the temperature constraint as you should.

Do you know how to do those two things? Thank you!

I've also attached a clean file "staffa_0".

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Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited June 2022

    can you provide a couple images of what you're trying to simulate, please?

  • Alessia
    Alessia Altair Community Member
    edited June 2022
    Adriano A. Koga_21884 said:

    can you provide a couple images of what you're trying to simulate, please?

    yes!

    I'd like to simulate an increase of temperature (from T ambient=25°C to 65°C) that causes a deformation on the component.
    I'd also like to create 2 constraints:

    • one that maintains the distance "x" constant even when there's a deformation
    • and another one that doesn't allow translation along the z axis on the surfaces marked with the yellow dots

    image

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