回転角速度が変動する扁平軸の不安定振動 : 第1報,軸の扁平性と角速度変動の共存による不安定振動の発生

概要

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This paper reports on the unstable vibrations of an asymmetrical shaft rotating with a fluctuating angular velocity. For lateral vibrations of this rotor-shaft system, the equations of motion are derived and solved by using an approximation which was previously proposed by the authors for analyses of unstable vibrations of an asymmetrical shaft supported by asymmetrically flexible bearing pedestals. The second-order approximation is carried out, and a solution of free vibrations and a frequency equation are obtained. When a rotating speed of an asymmetrical shaft fluctuates periodically with N times in a revolution, the results of the analyses show that unstable vibrations occur at the angular velocity not only near the major critical speed but also near 2/|(2±N)| times the major critical one.
一般社団法人日本機械学会の論文
1989-09-25