Bellows Vibration
Bellows Vibration
(OP)
Dear Savior...
I am trying to calculate the natural frequency of a bellows compressed under load.
the best calc i have used is Fn=2Pi x SQROOT(k/m)
My questions are :
1, Does anyone know of a better calc?
2, When I finally come to being able to check the calc through testing, what instrument do I use? (accelerometer?)
Thanks...
Mark.
I am trying to calculate the natural frequency of a bellows compressed under load.
the best calc i have used is Fn=2Pi x SQROOT(k/m)
My questions are :
1, Does anyone know of a better calc?
2, When I finally come to being able to check the calc through testing, what instrument do I use? (accelerometer?)
Thanks...
Mark.





RE: Bellows Vibration
The correct formula for calculating the natural frequency of a single degree-of-freedom oscillator is fn=(1/(2*pi))*sqrt(k/m). That is, (2*pi) is in the denominator.
If you can model your system as a single mass on a single spring this equation is appropriate.
You could use an accelerometer hooked up to a dynamic signal analyzer to verify the natural frequency. Alternately, you can hook up your accelerometer to a strip chart recorder or oscilliscope and measure the period between oscillations.
pj
RE: Bellows Vibration
Sorry, that was the equasion that I used, at least I have a varification of that.
I think I can use an oscilliscope (If the company hasn't dumped it!)...Just need to pursuade them to get an accelerometer!!
Thanks a lot for your help..
Regards,
Mark.
RE: Bellows Vibration
RE: Bellows Vibration