Resonance and Instability of Blade-Shaft Coupled Bending Vibrations with In-plane Blade Vibration
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概要
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As a major component of a power plant, a turbine generator must have sufficient reliability. Longer blades have lower natural frequency, thereby requiring that the design of the shaft and blade takes into account the coupling of the blade vibration mode, nodal diameter <I>k</I>=0 and <I>k</I>=1 with vibration of the shaft. <BR>The present work analyzes the coupling of the translation motion of the shaft with in-plane vibration of the blades with <I>k</I>=1 modes. At a rotational speed Ω<SUB>1</SUB>=|<I>ω<SUB>s</SUB></I>-<I>ω<SUB>b</SUB></I>|, the resonance of the blades has a relatively large amplitude. A violent coupled resonance was observed at a rotational speed Ω<SUB>2</SUB>=<I>ω<SUB>s</SUB></I>+<I>ω<SUB>b</SUB></I>. Resonance in blade vibration at Ω<SUB>1</SUB>=|<I>ω<SUB>s</SUB></I>-<I>ω<SUB>b</SUB></I>| was experimentally confirmed.
- ターボ機械協会、韓国流体機械学会、中国工程熱物理学会、国際水理学会の論文
ターボ機械協会、韓国流体機械学会、中国工程熱物理学会、国際水理学会 | 論文
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