Eigenfrequenies and mode shapes from a 2D plate with local mass and springs

[Homeswinghome]

Hello,

I just discovered EasyFEA and after going through (part of?) the documentation, I wonder if it fits to my need.

I would like to get the eigenfrequencies and the according mode shape over a large number of modes for a 2D plate (ie in x, y plan) for which I add on some points local mass and/or local stiffness (in z).

This is in the context of DIY development of DML (distributed mode loudspeaker). I developed a FDM solver but it is limited to rectangular plates. It works also currently with calculix but there are some errors in the returned mode shapes. So I am looking for an other tool if possible with a good integration with Python.
The eigenfrequencies and the mode shapes feed a second script which compute the acoustic pressure at some distance.
I can write some python codes but I have very limited skills when it comes to deal with the PDE and the wek form!

Thank you

Christian

[matnoel]

Hello @Homeswinghome,

Yes, I think EasyFEA could be a good fit for your application, especially since it already provides the framework for modal analysis and solving for eigenfrequencies and mode shapes (see Modal1.py and Modal2.py).

There is also the open issue #41 concerning the development of the required plate/shell capabilities. If you are willing to wait a little, I could work on this issue first and then test it specifically for your DML application, including the local masses and stiffnesses.

Would you be able to wait a bit while I work on issue #41? I think your application would be a very interesting case to validate the modal analysis capabilities.

Best regards,

Matthieu

[Homeswinghome]

Hello Matthieu,

Thank you for your quick reply. I will be happy if such examples can help to develop your tool.
No problem for me to wait.

Let me know when something is ready for you.

Christian