basics in vibrations
basics in vibrations
(OP)
I am a structural engineer and new in the area of vibrations. Can anyone suggest a good book for vibrations testing?. I need the basics on how to select accel positions, how to read the test data and how to refine the fem model so that it reflects the actual structure.
thanks
mzl2002
thanks
mzl2002
RE: basics in vibrations
RE: basics in vibrations
mzl's questions are very good, but are also very hard to answer. Accelerometers are usuallly placed in a fairly arbitrary fashion, towards the outer spatial limit of each component or sub-component.
The test data should be reduced to a set of mode shapes, frequencies, and damping values. This will allow direct comparison wih your FEA results (apart from the damping)
Modifying your FE model for good correlation: (1) DISCARD ALL RIGID ELEMENTS.
(2) do your statics work?
(3) are your masses OK?
Cheers
Greg Locock
RE: basics in vibrations
Have a look at this site, there are some good information and basics about vibration .
good luck
http://web.ukonline.co.uk/d.stevens2/vibanalysis/index.html
BK33
RE: basics in vibrations
Cheers
Greg Locock
RE: basics in vibrations