TY - GEN
T1 - Experimental Monte Carlo mistuning assessment of bladed disk vibration using forcing variations
AU - Li, Jia
AU - Castanier, Matthew P.
AU - Pierre, Christophe
AU - Ceccio, Steven L.
PY - 2006
Y1 - 2006
N2 - It is known that the vibration response of bladed disks in turbine engine rotors can be extremely sensitive to small, random blade-to-blade variations, or mistuning. However, it is cumbersome to assess the effects of random mistuning or validate numerical predictions for a population of mistuned bladed disks using experimental methods. In this work, as an alternative approach for performing vibration testing of many mistuning patterns, it is proposed that varying the external forcing function provided to the blades can be used to mimic the influence of structural blade property mistuning on the vibration response. Because it is much easier and more efficient to vary the external excitation than to physically alter the blades, this opens the possibility of running an experimental analog of a Monte Carlo simulation. This approach, referred to as an experimental Monte Carlo mistuning assessment, is explored and validated by comparing simulations and test data for a 24-bladed disk. The experimental Monte Carlo results are found to have excellent agreement with numerical Monte Carlo simulation results for a case of small standard deviation of mistuning.
AB - It is known that the vibration response of bladed disks in turbine engine rotors can be extremely sensitive to small, random blade-to-blade variations, or mistuning. However, it is cumbersome to assess the effects of random mistuning or validate numerical predictions for a population of mistuned bladed disks using experimental methods. In this work, as an alternative approach for performing vibration testing of many mistuning patterns, it is proposed that varying the external forcing function provided to the blades can be used to mimic the influence of structural blade property mistuning on the vibration response. Because it is much easier and more efficient to vary the external excitation than to physically alter the blades, this opens the possibility of running an experimental analog of a Monte Carlo simulation. This approach, referred to as an experimental Monte Carlo mistuning assessment, is explored and validated by comparing simulations and test data for a 24-bladed disk. The experimental Monte Carlo results are found to have excellent agreement with numerical Monte Carlo simulation results for a case of small standard deviation of mistuning.
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U2 - 10.2514/6.2006-1964
DO - 10.2514/6.2006-1964
M3 - Conference contribution
AN - SCOPUS:34147217276
SN - 1563478080
SN - 9781563478086
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
SP - 4540
EP - 4548
BT - Collection of Technical Papers - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 1 May 2006 through 4 May 2006
ER -