Please teach me how to extract modal analysis results from an RST file.

[sokenMori]

After performing modal analysis, which function of dpf.post can be used to obtain the following values from the RST file?

Eigenvalues
Node coordinates

If this is my first time posting, please let me know if there are any mistakes.

[pmaroneh]

Hi @sokenMori , for the mesh, this example should help and for extracting the frequencies, this one should help. For these type of how-to questions, you can also use/search the Ansys Developer Forum.

[PProfizi]

Hi @sokenMori, hi @pmaroneh,
it seems the operator is missing indeed. I raised an issue server-side and will let you know.

[sokenMori]

Thank you for teaching me such an important technique, @pmaroneh. I was able to solve the problem related to frequency acquisition.

[PProfizi]

Hi @sokenMori @pmaroneh, as a workaround while the ElementalMass operator is unavailable, you can get the elemental_volume result if available in your result file, and multiply it by the density.
If it is not available, you can also use pydpf-core to compute the elemental volume of the mesh with this operator.

[sokenMori]

Hi @PProfizi ,I'm sorry for the late reply. Thank you for the information. I will try to verify the process while referring to it.

[mcMunich]

@PProfizi Is there a operator for elemental density? Because if you want to get an elemental mass, you need to know the density for a particular element. And I am not sure the material operator is working if we have to access a material from a elemental id.