Title page for ETD etd-03142009-040531
|Type of Document
||Kavarana, Farokh H.
||Cracked shaft detection rig
||Master of Science
|Kirk, R. Gordon
|Plaut, Raymond H.
|Wicks, Alfred L.
|Date of Defense
The ever-growing interest of the modern-day rotor dynamicist in the early
detection of rotor cracks in turbomachinery has been the direct result of
multiple catastrophic experiences that industry has had to face in recent
times due to cracked rotors. The complete failure of the rotor due to crack
propagation is easily recognized as one of the most serious modes of plant
failure. Even so, this aspect has without question not received the attention
it warrants. The last decade has, however, witnessed some laudable
attempts that have been moderately successful in detecting cracked rotors.
This work presents the design and set-up of a complete test rig that can be
used for experimental research on response characteristics of cracked
rotors. The results of this research will permit increased confidence in
detecting the presence of rotor cracks in turbomachinery.
The designed rig is capable of testing cracked shafts under the effect of
lateral and coupled lateral-torsional vibrations. The conventional vibration
signature analysis approach has been employed for the purpose of test rig
evaluation and condition monitoring. The test rig has been shown to be
essentially functional and the experimental data generated with the test rig
are compared to appropriate analyses and published results.
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