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PML for plate

Posted 26 ago 2020, 21:03 GMT-4 General, Acoustics & Vibrations, Structural Mechanics Version 5.5 2 Replies

Reza
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Hello, I am using structural mechanic (plate physics) to model a 2D plate. I tried to find a way to make it like an infinite domain; however, I could not do that. I remember that I used ''PML'' or ''radiation boundary conditions'' previously for different physics but I could not find an equivalent form specifically for plate physics. Is there any way that I can define a boundary in plate physics to absorbs all the outgoing waves and avoid reflection from the outer edge of my domain? Best, Reza

2 Replies Last Post 28 ago 2020, 21:48 GMT-4
Henrik Sönnerlind COMSOL Employee

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Posted: 4 years ago 27 ago 2020, 14:56 GMT-4

Plates are more difficult than solids when it comes to truncation by PMLs. The reason is the velocity dispersion properties of bending waves. There is currently no built-in PML (or similar) condition for plates.

Here is a fairly recent paper, discussing a possible formulation of such a boundary condition, and the authors actually use an implementation in COMSOL Multiphysics to show the applicability of the theory:

https://www.sciencedirect.com/science/article/pii/S0020768317305140

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Henrik Sönnerlind
COMSOL
Plates are more difficult than solids when it comes to truncation by PMLs. The reason is the velocity dispersion properties of bending waves. There is currently no built-in PML (or similar) condition for plates. Here is a fairly recent paper, discussing a possible formulation of such a boundary condition, and the authors actually use an implementation in COMSOL Multiphysics to show the applicability of the theory:
Reza
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Posted: 4 years ago 28 ago 2020, 21:48 GMT-4

Hello,

Thanks for your response, I reviewed the paper and it looks interesting. It may be my only chance to do something like this.

Best, Reza

Hello, Thanks for your response, I reviewed the paper and it looks interesting. It may be my only chance to do something like this. Best, Reza

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