What is the Resonant Frequency of Steel and how much energy would it take to break one cubic inch steel?

Question

I am talking about the Resonant Frequency as in the Tesla Earthquake Machine.

Answer 1

hmmm .. speed of sound in steel apprx 13,333 mph

to convert to feet/ second:

60mph = 88 feet/sec

( 13,333 miles/hour ) *
(88/60) (feet/sec) (miles/hour) *
(12 in/foot) = 234, 661 inches/sec

freq = speed / (wavelength)

{here assume resonant wavelength = 1 inch}

freq = ( 234, 661 inch/sec ) / (1 inch)

freq = 234, 661 /sec = 234, 661 Hz


energy ???

dunno


freq

Answer 2

Good try randy, but we're dealing here with steel which has a sonic velocity of about 5100m/s. If your formula is right, then the resonant frequency is about 402kc.

Also, the 1 cu in could be shaped in various ways to vastly alter the resonant frequency

Answer 3

I am talking steel as in a general classification for thousands of grades of iron - which one ? and if you are serious all of them in a one inch cube would withstand any force the machine could put out harmonics would be on way too low a frequency to have any effect ! steel is damaged in quakes by forces causing movement not by resonance

Answer 4

I don't know the exact amount of energy, but the resonant frequency of a bar free at both ends is about f/lamda/2 where c is the speed of the wave in the mediam we are talking about. Taking the speed of sound to be 330 m/s in air and the length of lamda to be about one inch you get 26 khz.

Answer 5

Resonant Frequency Of Metals

Answer 6

Look up Infrasound. That does the trick just as well and is easier to build.

Answer 7

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