基礎励振を受ける弾性ロータの有限要素法による振動解析 : 第1報, 弾性支持-弾性回転軸-弾性回転円板系

抄録

High-speed rotors in jet engines or turbopumps used in space vehicles are mostly operated at a supercritical speed and their bearings and housings are usually supported elastically from the frame in order to reduce critical speeds. However, when an aircraft or a space vehicle turns or responds to disturbances, the rotor may be brought into contact with the casing due to the vibration caused by gyroscopic moment or centrifugal force. In this paper, a dynamic analysis of a rotor system that comprises flexible suspensions, a flexible shaft and a flexible disk is performed by a finite-element method. The rotor is excited by the frame's pitching motion, of which the axis is assumed to be distant from the center of mass of the rotor. The usefulness of modeling and the validity of the computational program are demonstrated by comparison with the experimental results obtained using a model rotor.