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Reply to "Glued Structure for Modal Analysis"

I totally agree with Testtech. If you picture a structure in 3D as series of interconnected mass-spring elements and assuming that glue vs. metal element stiffness are drastically different, it will become clear that modal parameters will also be different.

To verify this concept, you can do a quick modal test on a metal bar; then cut it, glue the halves together using, say, locktite glue, and test again. I predict hugh difference.
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