516 Study of Rotor Vibration due to the Rubbing against Casing

Abstract

With rapid advances of rotating machinery ， in order to increase the 皿 aohines performances the radial clearance between rotor and casing beGame s 皿 aller and smaller ， As a result ， contact vibrat 量 on accidentally occurred in the rQtating machinery due to rubbing ． Espeoially in the Gase of high − speed domain ． various k量 nds of contact vibration oocurred ， such as ' " collision type synchronous vibration 「 「 ， 掣 Fsub − harmonic vibration " ， etc ． In this study ， it investigated what influence the offset of rotQr and casing position wou ！ d have en generating of sub − harmonic vibration ， analytically and experirnentally ．

Control of a rubbing rotor using an active auxiliary bearing

“…Watanabe [68] presented a theoretical and experimental study of the rotor vibration due to the rubbing against casing, for high-speed regimes and different configurations of the casing. The casing dynamics have been taken into account.…”