Deflection in Plant Structure
Deflection in Plant Structure
(OP)
One of the metallic structure approx. 50 mtrs. high, around the plant process equipment vibrates too much. We have doubt that deflection/ vibration is higher than normal & could be dangerous.
What could be the probable reasons ?
Any method to measure the deflection ?
How much deflection is allowed as per the code?
Which code is guiding factor for deflection in plant structure?
Forum may please respond or give suitable reference ...!
Thanks...!
What could be the probable reasons ?
Any method to measure the deflection ?
How much deflection is allowed as per the code?
Which code is guiding factor for deflection in plant structure?
Forum may please respond or give suitable reference ...!
Thanks...!





RE: Deflection in Plant Structure
Where are "We"?
Mike Halloran
Pembroke Pines, FL, USA
RE: Deflection in Plant Structure
Thanks for your attention ... "We" are Human Technocrats & "We" live on "The Earth" currently.
I would appreciate if you could help to throw light on the techncial issue mentioed & request not to read between the lines..!
RE: Deflection in Plant Structure
If I have a structure that vibrates to much and its 50m high can you tell me why that is or would you like some more information so you can give a proper answer.
RE: Deflection in Plant Structure
Soon, I shall be trying an innovative method to measure the defelction in our 80 mtr. high steel structure. let me suceed , i will share
RE: Deflection in Plant Structure
RE: Deflection in Plant Structure
Obviously it is not stiff enough.
But the real question is, Is it a problem?
Tell us why it matters.
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Plymouth Tube
RE: Deflection in Plant Structure
Find out what the driving frequency is, then change the natural frequency of the tower to be out of sync with that and the vibration will cease. Changing the mass distribution will do that.
Also, you really need to anayze what several of the natural frequencies are here.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Deflection in Plant Structure
How much deflection is allowed as per the code?
Which code is guiding factor for deflection in plant structure?
<<<<
Ask your AHJ. We can't know which code applies absent spatial resolution considerably finer than one Earth.
Before you go fixing the structure, consider the possibility that the plant designer intended for an unusually large structural response to wake up the Human Technocrats so they would check for problems in the supported process equipment.
Mike Halloran
Pembroke Pines, FL, USA