References for Flow Induced Vibration

Question

References for Flow Induced Vibration

reichertc (Mechanical)

(OP)

24 Jul 01 14:57

I am currently doing an analysis of injection quills to determine if flow past the quill will induce vibration that could cause failure. Currently, I am modelling the quill as a thermowell and using a vendor program to determine if it is acceptable. Unfortunately, for some situations (ie. 3/4" line projecting 24" into the main stream) it is impossible to model it as a thermowell and reduce the forced-to-natural frequency ratio to an acceptable level. Does anyone know of any handbooks or references out there that have good information on flow induced vibration? It would be especially useful if it had some examples for situations where the vibrating member was restrained at different locations to change it's natural frequency.

Thanks.

butelja (Mechanical) · Answer 1 · 2001-07-24 15:08:14

Flow Induced Vibrations by Blevins is a good reference on the subject. I believe the same author also has another book with a title something like Formulas for Natural Frequencies and Mode Shapes that should make a good companion for your application

castel (Mechanical) · Answer 2 · 2001-08-09 22:54:48

I was responsible for checking the stability of dip pipes in stirred tank reactors. Our approach was to assume an average velocity across the pipe and use an assumed turbulent regime Strouhal No. (non-dimensional shedding frequency) to calculate the excitation frequency. To be safe, we limited the forced shedding frequency to 1/2 the natural frequency of the pipe (cantilevered beam). We occasionally attached vertical dampeners fore and aft of the pipe in the plane of the approaching fluid stream to prevent excessive vibration.

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References for Flow Induced Vibration