Estimate the input excitation energy
Estimate the input excitation energy
(OP)
Hi. I am using an electomagnetic shaker coupled to a power amplifier to excite rectangular aluminium beams at their first and second natural frequencies. I have estimated the deflections of the beam at each of the frequencies and know the mass and dimensions of the beams. I want to to know, if there is any formula to calculate the input excitation provided by the shaker to excite the beam, using the mass and deflection. The beams are fixed at one end to the shaker(cantilever). I am attaching an image of the setup to avoid any confusions.





RE: Estimate the input excitation energy
Cheers
Greg Locock
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RE: Estimate the input excitation energy
RE: Estimate the input excitation energy
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Estimate the input excitation energy
Tobalcane
"If you avoid failure, you also avoid success."
RE: Estimate the input excitation energy
RE: Estimate the input excitation energy
Why would anyone run it open loop?
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Estimate the input excitation energy
However, if you're exciting natural frequencies of the beam, input force can be very low to start and maintain vibration at that frequency.