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Added mass, Mass type
Posted 2024年10月3日 GMT+8 17:28 Structural & Acoustics, Structural Mechanics, Physics Interfaces 2 Replies
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Hello. I'm confused about something in the process of using COMSOL, so I have a question.
I have a question about 'added mass' in Solid Mechanics. When I add an 'added mass', I select the 'Mass Type'. Also, in 'Boundary Selection', I select some geometries(or boundaries) to which the added mass will be added . When I set the Mass type to Total mass, I have to enter the value for 'kg'.
What I'm wondering is, if I select a total of 4 geometries in the boundary selection and enter a total mass of 10 kg, is the mass of 10 kg added to each of the 4 geometries, or is it entered so that the total sum of the mass for the 4 geometries is 10 kg?
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It is the mass for the entire selection.
-------------------Henrik Sönnerlind
COMSOL
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Henrik gave the answer, but for these types of questions it is much quicker to set up a simple test case for which you can find an analytical expression (like a resonance system), have two boundaries on an edge, and then apply the mass to one boundary, run, and then include the other boundary, run again, and see how/if the resonance shifted/the static deformation changed or similar.
-------------------René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com