Discussion Forum

You do have symmetry. The symmetry is at the two boundaries you have selected.

You do have symmetry. The symmetry is at the two boundaries you have selected.

I have selected the symmetry for two boundaries, but the results show that these boundaries seem not to be symmetric. This is my feeling, is it correct ?

Don't you have symmetry right at those boundaries, as indicated in my png?

I have symmetry in these boundaries.

And that is all that this symmetry condition gives; symmetry at those specific boundaries.

And that is all that this symmetry condition gives; symmetry at those specific boundaries.

Thank you, now I understand.

Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations)

Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations)

Thank you so much for your detailed explanation and comment.

My pleasure.