TY - JOUR
T1 - Traveling-wave excitation and optical measurement techniques for non-contacting investigation of bladed disk dynamics
AU - Judge, John A.
AU - Ceccio, Steven L.
AU - Pierre, Christophe
PY - 2003/5
Y1 - 2003/5
N2 - In this paper we present the design of an experimental facility for measuring the vibration of bladed disks, such as those used in turbomachinery. In particular, a method for simulating the effects of rotating a bladed disk past stationary sources of excitation is described, in which acoustic excitation sources in the vicinity of each blade receive harmonic signals with precise phase differences. Optical measurement techniques, including laser vibrometry and holographic interferometry, are used to observe the vibration, so that neither excitation sources nor measurement devices contact the test specimen physically. The result is a versatile test facility appropriate for the investigation of complex bladed disk dynamics, including the effects of small variations in parameters, such as blade mistuning.
AB - In this paper we present the design of an experimental facility for measuring the vibration of bladed disks, such as those used in turbomachinery. In particular, a method for simulating the effects of rotating a bladed disk past stationary sources of excitation is described, in which acoustic excitation sources in the vicinity of each blade receive harmonic signals with precise phase differences. Optical measurement techniques, including laser vibrometry and holographic interferometry, are used to observe the vibration, so that neither excitation sources nor measurement devices contact the test specimen physically. The result is a versatile test facility appropriate for the investigation of complex bladed disk dynamics, including the effects of small variations in parameters, such as blade mistuning.
KW - Bladed disk
KW - Measurement
KW - Mistuning
KW - Non-contact excitation
KW - Turbomachinery
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U2 - 10.1177/0583102403035003002
DO - 10.1177/0583102403035003002
M3 - Article
AN - SCOPUS:0038528595
SN - 0583-1024
VL - 35
SP - 183
EP - 190
JO - Shock and Vibration Digest
JF - Shock and Vibration Digest
IS - 3
ER -