On the Dynamically Unstable Vibrations of the Shaft Carrying an Unsymmetrical Rotating Body

DOI Web Site Web Site 1 Citations

Bibliographic Information

Other Title
  • 非対称回転体の動的不安定振動
  • ヒタイショウ カイテンタイ ノ ドウテキ フアンテイ シンドウ

Search this article

Description

In the lateral vibrations of a shaft at a rotating speed ω carrying an unsymmetrical rotating body, a free vibration of frequency pi always appears with another free vibration having frequency p^-i= 2ω-pi. Coexistence of pi and p^-i results in not only the unstable vibrations of frequency ω appearing about the major critical speeds where the relation pi=p^-i holds but the unstable vibrations with frequencies pi and pj near the rotating speed ωd where the relation pi=pj (i≠j), i.e., pi+pj=2ω is satisfied. The range of unstable region in which these unstable vibrations take place increases as the degree of unsymmetry of the rotor increases. According as the polar moment of inertia becomes larger, the rotating speed where the unstable vibrations cccur becomes higher and the range of the unstable region increases. For the vibratory shaft system mounted by an unsymmetrical rotating body, regardless of dimensions of shaft and rotor, there is always only one unstable region of this kind.

Journal

Citations (1)*help

See more

Details 詳細情報について

Report a problem

Back to top