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Would you happen to know if this formula gives the frequency in radians/sec or cps? Wondering if I need to /2*pi to convert it to Hz.

Oh, I think I got it.... it should be I = pi/64*(OD^4-ID^4)

oh, I forgot to ask... any advice on the I ? Which one would you recommend for this equation? I = PI * (OD^4 - ID^4)/64 I = PI*d^3*t/8 (for a thin wall round tube)

Thanks so much Greg... you've been a great help! Posted this on the "physics forums" and got no reply after 3 days so thought I'd try here. Glad I did! Cheers!

Excellent! Thanks for the help... I really appreciate that. I will definitely try subbing the thickness as you recommended and see how that works out. Sorry for my ignorance but I have to ask, what does CSA refer to? Thanks again Greg!

I came across this formula by Blevins for calculating the natural frequency of a hollow cylinder and was hoping that someone could answer a couple of questions I have. First, here's the formula: f = A/(2*pi*L^2)*sqrt(E*I/m) A= 9.87 for first mode I = Area Moment of Inertia (m^4) m= Mass per...

ok, found the answer to the last question... d is diameter.

Ok, after further research I found the answers to these questions. The ring frequency and the radial breathing mode are indeed the same thing. And the mu is actually referring to the masse density rather than the mass per unit length, etc... However, I have a new question regarding the...

thread384-152064 Sorry to start a new thread on this but the other one that referenced this topic was closed. In the previous discussion (see above reference post) entitled "Bell modes? for a circular tube" there was mention of a ring frequency formula posted by electricpete where he compared...