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contributor authorLiu, Yi
contributor authorLiu, Heng
contributor authorWang, Nanshan
date accessioned2017-11-25T07:20:05Z
date available2017-11-25T07:20:05Z
date copyright2016/25/10
date issued2017
identifier issn1048-9002
identifier othervib_139_01_011004.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4236185
description abstractThe effects of typical machining errors on the dynamic features of rod-fastened rotor bearing system (RBS) are studied in this paper. Three micron-sized machining errors are considered in a three-dimensional (3D) rod-fastened model. The static effects of machining errors are investigated by applying finite element method. Results demonstrate that machining errors not only bring about mass eccentricity but also cause obvious rotor bending due to large pretightening force. Then, nonlinear dynamic features such as stability and bifurcation are analyzed by using target-shooting technique, track-following method, and Floquet theory. Analysis data indicate that rotor bending originated from machining errors reduces the system stability evidently. It is also observed that the vibration value continues to go up after critical speed as rotating speed increases. It is a particular property compared with integral rotor. It explains the reason why the machining precision of rod-fastened rotor is much higher than that of the corresponding integral rotor to some extent. Moreover, differences between machining errors are compared and the results show that the machining precision of axial assembly interfaces should be paid more attention in the rod-fastened rotor design.
publisherThe American Society of Mechanical Engineers (ASME)
titleEffects of Typical Machining Errors on the Nonlinear Dynamic Characteristics of Rod-Fastened Rotor Bearing System
typeJournal Paper
journal volume139
journal issue1
journal titleJournal of Vibration and Acoustics
identifier doi10.1115/1.4034768
journal fristpage11004
journal lastpage011004-10
treeJournal of Vibration and Acoustics:;2017:;volume( 139 ):;issue: 001
contenttypeFulltext


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