Accession Number : ADP000353

Title :   Rotor Vibration Caused by External Excitation and Rub,

Corporate Author : HITACHI LTD IBARAKI (JAPAN) MECHANICAL ENGINEERING RESEARCH LAB

Personal Author(s) : Matsushita,Osami ; Takagi,Michiyuki ; Kikuchi,Katsuaki ; Kaga,Makio

Report Date : 1982

Pagination or Media Count : 42

Abstract : For turbomachinery with low natural frequencies, considerations have been recently required for rotor vibrations caused by external forces except unbalance one, such as foundation motion, seismic wave, rub and so forth. Such a forced vibration is investigated analytically and experimentally in the present paper. Vibrations in a rotor-bearing system under a harmonic excitation are analyzed by the modal technique in the case of a linear system including gyroscopic effect. For a nonlinear system a new and powerful quasi-modal technique is developed and applied to the vibration caused by rub.

Descriptors :   *Turbomachinery, *Rotors, *Vibration, *Stability, *Workshops, External, Sources, Friction, High velocity, Pumps, Mathematical models, Japan

Distribution Statement : APPROVED FOR PUBLIC RELEASE