In this form of modal analysis I wish to find the natural frequency of this body dependent on which cantilever is momentarily statically deflected and released. An example would be what frequency qualities would the body and cantilevers exhibit if the circled end was displaced and released. For reference, the CAD part is a musical comb and I am attempting something similar to this https://blog.kaistale.com/?p=1568, though am unsure if SOLIDWORKS is capable of the same.
I am looking to understand which studies would be used to gauge the resulting frequencies, which would allow for better design of the cantilevers musically, thank you.
I don't have SW Simulation (just FlowSim), but this is a classic case for frequency analysis by regular FEA.
You don't actually need to displace and release the tines. You restrain (or not) some other area of the thing, then just run a modal frequency analysis. Multiple modes are solved for. You'll get different frequencies for different shaped/length tines. Yes, each tine will have more than one vibration frequency (or mode.)
If you're going to restrain it, make the restraints accurately reflect what is clamped and what isn't. For similar parts, I often make very, very shallow chamfers on the hole edges and restrain them or add thin washers over the holes and restrain the surfaces of the washers. As an interesting experiment, run it both with the fixed restraints and without any restraints (called a "free-free" analysis.)
You also must do a hand calculation estimate. For that, you can assume the tines are just beams in themselves.