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Thank you for your feedback and sharing the code! I have checked and compared with your code, the transmission results of the double stage are correct. The point that you mention, I think, comes from the fact in my code, the force is applied on the m2 for the double stage and on m1 for the...

Yes! I keep you inform

Thank you Greg for this description. You code is available somewhere? As @Denial , i have developped some free tools to calculate also the mass-spring transmissibility. You can have a look here and give me your feedback. It will be nice to integrate a kind of tool dedicated to TMD easily...

Thank you for your reply and sorry for my delay. I have already checked this kind of magnet used to lift object (static - on/off) but i don't really know what is the behavior of this electromagnet in dynamic using it like a loudspeaker. What do you think?

You re right, i have already use a speaker but it doesn't work well but perhaps a modified speaker could work?

I think a frequency range from 10 to 1000Hz, and amplitude just enough to excite the modes of the plates.

Thank for your reply. I made a mistake in the thickness. It s 1mm and not 0.001mm. So do you think electromagnet could work and which one?

Hello dear community I m searching a solution to excite the vibration of a steel plate without contact. My idea was to use a kind of electromagnet and send a white/pink noise to generate vibration in the plate but i don't know really which one to buy for this project. The plate (30cm x 30cm) is...