熱曲りロータの振動予測手法 : FEMソフトを用いた計算手法と要素実験(機械力学,計測,自動制御)

概要

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The excitation force produced by thermal bending was calculated as a couple of equivalent bending momentum, which causes an equivalent thermal bending shape. The unbalance produced by thermal bending was also calculated in consideration of stiffness of bearings and the rotor. We compared the calculated vibration with the measured vibration of a heater-mounted rotor. The calculation error of the vibration amplitude in resonance is about 12% at the loop of the vibration mode on a critical speed. We also compared the calculated result by this method with that by simple method, in which the eccentricity of the rotor at main bearings is zero. We found that in case of calculating a thermal bending unbalance of a rotor, which has more than three bearings and that bearings stiffness is low, we should consider the stiffness of bearings and the rotor to estimate a thermal bending rotor vibration.
社団法人日本機械学会の論文
2002-11-25