弾性支持回転軸の過渡振動問題 : 安定性の解析

概要

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In this paper, transient vibration and stability of flexibly supported rotor-shaft system are treated. The analysis model is as follows; l) The model used for analysis is a shaft horizontally supported on two bearings, with one rotor at the center of it's span. 2) The rotor is continuously accelerated or decelerated with constant angular acceleration or deceleration. 3) The rigidity of bearings and that of the bearing-supports are equal about x and y-directions respectively. 4) The damping forces of the bearings and bearing-supports are equal about x and y-directions respectively, and both are linear type. The first approximate equations are derived by asymptotic method from equations of motion, and the equations of stability condition are led out from above equations. And the stability limit speed diagrams are drawn by using solutions of equation of stability condition. Influences of each parameter are discussed with numerical analysis. As the result of this study, it was analytically cleared that the larger the angular acceleration of the rotating shaft is, the higher the stability limit speed of the shaft is.
東海大学の論文