# How to make the vibration of the 3D square plate's equation in Freefem?

**URL:** <https://community.freefem.org/t/how-to-make-the-vibration-of-the-3d-square-plates-equation-in-freefem/934>\
**Category:** General Discussion\
**Created:** [April 20, 2021, 2:20am UTC](https://community.freefem.org/t/how-to-make-the-vibration-of-the-3d-square-plates-equation-in-freefem/934 "2021-04-20T02:20:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![HGH](https://avatars.discourse-cdn.com/v4/letter/h/3be4f8/32.png) [@HGH](https://community.freefem.org/u/HGH)\
**Post date:** [April 20, 2021, 2:20am UTC](https://community.freefem.org/t/how-to-make-the-vibration-of-the-3d-square-plates-equation-in-freefem/934/1 "2021-04-20T02:20:09Z")

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Hello, everybody

I want to ask how to write the vibration of the 3D square plate’s equation such like Matlab’s, I don’t know the Freefem’s vibration PDE is how to write, and I confused for a long time. I would appreciate it if you can help me on the question

The function I want to achieve is the same as in Matlab. URL is [Vibration of Square Plate - MATLAB & Simulink (mathworks.com)](https://www.mathworks.com/help/pde/ug/vibration-of-a-square-plate.html)