TY - GEN
T1 - Field identification of stiffness and damping characteristics of fluid film bearings
AU - Tawfick, Sameh H.
AU - EL-Shafei, Aly
AU - Mokhtar, M. O.A.
N1 - Funding Information:
The authors gratefully acknowledge the support of the Engineering and Physical Sciences Research Council of the U.K.u nder Contract No. GRlJ46661.
PY - 2008
Y1 - 2008
N2 - A method for field identification of stiffness and damping characteristics of fluid film bearings FFB is derived. The method relies on measuring both the shaft and the housing's vibration response. Two independent unbalance runs are performed and the synchronous response is recorded. Using the housing vibration data, the amount of unbalance acting on the bearing, as well as the flexible shafts'"modal mass" can be experimentally determined. Thus, with this method, field engineers can identify the bearings impedance in flexible rotor-bearing systems. A test rig comprising a flexible shaft supported on two cylindrical journal bearings is used to verify the proposed method. The amount of uncertainty in the derived coefficients is calculated.
AB - A method for field identification of stiffness and damping characteristics of fluid film bearings FFB is derived. The method relies on measuring both the shaft and the housing's vibration response. Two independent unbalance runs are performed and the synchronous response is recorded. Using the housing vibration data, the amount of unbalance acting on the bearing, as well as the flexible shafts'"modal mass" can be experimentally determined. Thus, with this method, field engineers can identify the bearings impedance in flexible rotor-bearing systems. A test rig comprising a flexible shaft supported on two cylindrical journal bearings is used to verify the proposed method. The amount of uncertainty in the derived coefficients is calculated.
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U2 - 10.1115/GT2008-50909
DO - 10.1115/GT2008-50909
M3 - Conference contribution
AN - SCOPUS:69949126573
SN - 9780791843154
T3 - Proceedings of the ASME Turbo Expo
SP - 1191
EP - 1201
BT - 2008 Proceedings of the ASME Turbo Expo
T2 - 2008 ASME Turbo Expo
Y2 - 9 June 2008 through 13 June 2008
ER -