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Error while attempting to perform frequency domain study

Posted 6 mars 2025, 14:00 UTC−5 Acoustics & Vibrations, Computational Fluid Dynamics (CFD), Studies & Solvers Version 6.2 2 Replies

Jacob Smith
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Hi there,

I'm very green to COMSOL and am encountering this monster of an error while trying to run frequency domain study, does anyone know how I'd go about fixing it?

I can't upload a copy of the file without permission from my supervisor, but any help would be appreciated.

  • Feature: Stationary Solver 1 (sol1/s1) Division by zero.
  • Function: / Failed to evaluate variable.
  • Variable: comp1.solid.D13
  • Defined as: (comp1.solid.Ecomp1.solid.nu)/((1+comp1.solid.nu)(1-(2*comp1.solid.nu))) Failed to evaluate variable.
  • Variable: comp1.solid.Seli33
  • Defined as: ((comp1.solid.eel11comp1.solid.D13)+(comp1.solid.eel22comp1.solid.D23))+(comp1.solid.eel33*comp1.solid.D33) Failed to evaluate variable.
  • Variable: comp1.solid.Sel33
  • Defined as: comp1.solid.Seli33 Failed to evaluate variable.
  • Variable: comp1.solid.Sl33
  • Defined as: comp1.solid.Sel33 Failed to evaluate expression.
  • Expression: dvol*(-comp1.solid.Sl33) Failed to evaluate Jacobian of expression.
  • Expression: (-comp1.solid.Sl11test(comp1.solid.el11)-2comp1.solid.Sl12test(comp1.solid.el12)-2comp1.solid.Sl13test(comp1.solid.el13)-comp1.solid.Sl22test(comp1.solid.el22)-2comp1.solid.Sl23test(comp1.solid.el23)-comp1.solid.Sl33test(comp1.solid.el33))(dvol)
2 Replies Last Post 7 mars 2025, 05:44 UTC−5
David Greve
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Posted: 6 months ago 6 mars 2025, 17:43 UTC−5

Based on your errors I can say that Something is Not Right. Sometimes an error of this sort means that some essential material properties have not been specified.

I suggest you construct a simple problem with the same physics and materials. For example, a cube. Maybe you will see what is missing while doing this and if not, if the same error messages appear, then you can post the file.

Based on your errors I can say that Something is Not Right. Sometimes an error of this sort means that some essential material properties have not been specified. I suggest you construct a simple problem with the same physics and materials. For example, a cube. Maybe you will see what is missing while doing this and if not, if the same error messages appear, then you can post the file.
Acculution ApS Certified Consultant
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Posted: 6 months ago 7 mars 2025, 05:44 UTC−5

My bet is that you have a Poisson's ratio of 0.5 somewhere.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
My bet is that you have a Poisson's ratio of 0.5 somewhere.

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