wave traveling around a pipe wall

[Tmoose]

I think I remember reading about calculating a vibrational mode of a thin wall pipe where a wave travels around the circumference. Maybe ring frequency? Does that sound right?

Dan T

 

[btrueblood]

Tangential mode vibration. Can occur as "slosh" mode (think of a wave with a node along a diameter) and "spin" mode (same wave, but the nodal line precesses at any velocity up to wave speed), they give identical results for frequencies.

see thread384-152064

http://www.eng-tips.com/viewthread.cfm?qid=152064

 

[MikeyP]

Yup, ring frequency is a mode of a ring or infinite cylinder. It is strange because the strain mechanism of the material "particles" is entirely longitudinal, but the resulting motion is entirely radial.

You might sometimes see it called a "breathing mode". For frequencies above the ring frequency, the dynamic behaviour of a cylinder tends very quickly towards that of a flat plate.

M

--
Dr Michael F Platten