639 回転機械の翼軸連成振動の計測について
詳細
The turbine generator requires sufficient reliability as a major component of the power plant. For longer blades, however, the lower natural frequency requires that the design of the shaft and blade takes into account the coupling of the blade vibration mode, nodal diameter k=0 and k=1 with the vibration of the shaft. The present work analyzes the coupling of the tilting motion of the shaft with the out-of-plane vibration of the blade within k=1 modes. At a rotational speed Ω_1=|ω_s-ω_b|, the resonance of the blades had a relatively big amplitude. The resonance in blade vibration at Ω_1=|ω_s-ω_b| was experimentally confirmed.
