Document Details

Document Type : Article In Journal 
Document Title :
Shaft Mass Effect on the Dynamic Behavior of a Rotor Supported by Fluid Film Bearings
تأثير كتلة العمود على السلوك الديناميكي للعمود المحمول على حوامل منزلقة
 
Subject : Mechanical Engineering 
Document Language : English 
Abstract : Shaft mass effect on the dynamic behavior of a rotor supported by fluid film bearings is studied. The rotor is assumed as a thin disk located on the middle of an elastic shaft, which is supported by fluid film bearings. Non zero elastic shaft mass is considered. Journal bearing is assumed as a short-plain type and it is represented by direct and cross-coupling stiffness and damping coefficients. These coefficients depend on the angular speed of the system. It is assumed that an electric motor accelerates the rotor. The electric motor speed is assumed to be controlled by a second order transfer function. Simulation results show that for small values of mass ratio which is defined as the ratio of the shaft mass to the disk mass, one pair of complex roots assumes positive real part for a range of a rotor speed and makes the system unstable. As the mass ratio gets bigger, this pair of root becomes stable but the other pair of complex roots assumes positive real parts and the system becomes unstable again. The system is always stable for subcritical run but unstable for some speed range for the supercritical run 
ISSN : 0954-4062 
Journal Name : Journal of Mechanical Engineering Science: Part C 
Volume : 222 
Issue Number : 4 
Publishing Year : 1429 AH
2008 AD 
Article Type : Article 
Added Date : Wednesday, April 6, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
خالد عبدالله النفيعيAlnefaie, Khaled AbdullahResearcher kalnefaie@kau.edu.sa

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 29578.pdf pdfShaft Mass Effect on the Dynamic Behavior of a Rotor Supported by Fluid Film Bearings

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