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Band structure in Phononic Crystal

Posted 8 sept. 2014, 23:03 UTC−4 MEMS & Nanotechnology, MEMS & Piezoelectric Devices Version 4.3a 2 Replies

Ha Ha
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Hello everyone,

Please help me how to sweep irreducible part of the first Brillouin zone in unit cell of phononic crystal to get the band gap.

Thanks in advance
2 Replies Last Post 25 janv. 2016, 12:45 UTC−5
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Ukesh Koju
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Posted: 9 years ago 11 juin 2015, 15:13 UTC−4
I defined kx = 0,ky =0, in parameters; i n periodic periodic boundary condition for 2D sq Lt I chose floquet BC and used kx and ky for kf (for x and y box respectively), ; right click on study to add parametric sweep, where I chose kx = o to pi/a, (a = lattice constant). from the derived values(result>derived values>global evaluation); we can get kx vs eigen freq, but I got transverse mode only, z- mode missing (for solid solid 2d sq lattice).

BTW did you figure it out how to get a proper band structure for a 2D phononic crystal?

Thank you
I defined kx = 0,ky =0, in parameters; i n periodic periodic boundary condition for 2D sq Lt I chose floquet BC and used kx and ky for kf (for x and y box respectively), ; right click on study to add parametric sweep, where I chose kx = o to pi/a, (a = lattice constant). from the derived values(result>derived values>global evaluation); we can get kx vs eigen freq, but I got transverse mode only, z- mode missing (for solid solid 2d sq lattice). BTW did you figure it out how to get a proper band structure for a 2D phononic crystal? Thank you
Nagi Elabbasi Facebook Reality Labs
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Posted: 9 years ago 25 janv. 2016, 12:45 UTC−5
I uploaded a COMSOL file to the Model Exchange that shows how to set up a phononic band gap eigenfrequency analysis. Here is the link: www.comsol.com/community/exchange/432/.
I uploaded a COMSOL file to the Model Exchange that shows how to set up a phononic band gap eigenfrequency analysis. Here is the link: http://www.comsol.com/community/exchange/432/.

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