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Modal Mass Calculation
Posted 18.03.2024, 03:51 GMT-4 Version 6.1 1 Reply
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Hi , I need to evaluate modal mass for a quartz crystal, How to calculate effective modal mass of a longitudinal or shear mode in a 2D axis syemmetric model or 2D model. I suppose modal mass should be in order of micron but what I am gettiing is way too smaller than that. If normalzing the mode mass also the number doesn't make sense . How COMSOL is calculating modal mass and total mass? I was refering to this thread https://www.comsol.com/forum/thread/30971/Modal-Mass-calculation but somehow number which I am getting are not matching up for a quartz of 10gram. Any suggestions in this regards will be welcome?
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The thread you are linking to is obsolete. It was created before the introduction of modal mass variables in COMSOL.
You can find the definition of modal mass in the the section Eigenfrequency Studies in the theory chapter of the Structural Mechanics Module User's Guide.
-------------------Henrik Sönnerlind
COMSOL