非対称弾性支持した非対称回転軸の振動に関する研究 : 支持部外部減衰の影響について

概要

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To make clear the dynamic characteristics of a rotating shaft exactly, we should take into consideration both the elastic asymmetry of a shaft and the elasticity, especially the asymmetric elasticity of supports. To give an elastic rotating shaft system generality, the authors have been considering an idealized model, in which a disk is mounted at the center of a flat shaft with different bending rigidities in two mutually vertical directions corresponding to the principal axes of inertia of the section. Each of the supporting parts of both ends is supported by springs in both directions vertical and horizontal. Masses are concentrated on the central disk part and supporting parts of both end, as a concentrated mass system. In previous reports, the authors analyzed, by using asymptotic method, the unstable regions in the free vibrations and forced vibrations of the system, and still more pointed out the existence of the subharmonic resonances. In this report, the effects of the external damping mounted at the supporting parts were theoretically and experimentally studied. As the results of the analyses, it was confirmed that giving the external damping to supporting parts was very effective to control the resonances, especially the subharmonic resonances.
湘南工科大学の論文
1986-03-26