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FEM Mesh Dependency Test

FEM Mesh Dependency Test

FEM Mesh Dependency Test

(OP)
Hello All,

I have done an FEM simulation and have this question. Is there a way you can know that your solution (Stress analysis or modal analysis) is mesh independent? I have varied the mesh resolution and each time i am getting a variation mostly in the first and second mode frequencies. The third, fourth, fifth and sixth seem to be changing less. So I am wondering whether the various values i am getting are physical (real) or non-physical (due to numerical errors, etc).

Any hint on how to get a mesh independent solution in FEM would be appreciated.

Thanks in advance!
Jimmy

RE: FEM Mesh Dependency Test

How much are your results varying ? 5% or 10% or 15% ? For our analysis, we stop refining the mesh when the difference between two consecutive refinements is less than 5%.

So as rstupplebeen also says, the mesh you choose should depend on your desired accuracy and available computational power.

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