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A problem of "Material Contents"

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While trying to learn the example of Acoustic-Structure Interaction, I am getting a problem.
I do it myself. At the Add Material window, I select Aluminum 3003-H18. After that at the Material Contents, there is a property which is Speed of sound. This property does not in the example of Acoustic-Structure Interaction, and I don't know how to remove it.

0 Replies Last Post 22 feb 2016, 03:23 GMT-5
COMSOL Moderator

Hello 昱成 陈

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