Title of article :
ROTOR MASS EFFECT ON NONLINEAR DYNAMIC BEHAVIOR OF AERODYNAMIC NONCIRCULAR JOURNAL BEARING SYSTEMS
Author/Authors :
RASHIDI, R. shahrood university of technology - Dept of Mechanical Engineering, شاهرود, ايران , KARAMI MOHAM MADI, A. shahrood university of technology - Dept of Mechanical Engineering, شاهرود, ايران , BAKHTIARINEJAD, F. amirkabir university of technology - Dept of Mechanical Engineering, تهران, ايران
Abstract :
This paper presents the effect of rotor mass on nonlinear dynamic behavior of a rigidrotor supported by aerodynamic noncircular journal bearings. A finite element method has beenemployed to solve the Reynolds equation in static and dynamical states and the dynamicalequations are solved using Runge-Kutta method. To analyze the behavior of the rotor center inhorizontal and vertical directions under different operating conditions, dynamic trajectory, powerspectra, Poincare maps and bifurcation diagrams are used. Results of this study reveal how thecomplex dynamic behavior of two types of noncircular bearing systems comprising periodic andKT -periodic responses of the rotor center varies with changes in rotor mass values.
Keywords :
Aerodynamic noncircular bearing , rotor mass , poincare map , bifurcation
Journal title :
Iranian Journal of Science and Technology Transactions of Mechanical Engineering
Journal title :
Iranian Journal of Science and Technology Transactions of Mechanical Engineering
