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    Nonlinear Dynamics of Flexible Rotors Supported on Journal Bearings—Part II: Numerical Bearing Model 

    Miraskari, Mohammad; Hemmati, Farzad; S. Gadala, Mohamed (American Society of Mechanical Engineers, 2018)
    The nonlinear stability of a flexible rotor-bearing system supported on finite length journal bearings is addressed. A perturbation method of the Reynolds lubrication equation is presented to calculate the bearing nonlinear ...
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    Nonlinear Dynamics of Flexible Rotors Supported on Journal Bearings—Part I: Analytical Bearing Model 

    Miraskari, Mohammad; Hemmati, Farzad; S. Gadala, Mohamed (American Society of Mechanical Engineers, 2018)
    To determine the bifurcation types in a rotor-bearing system, it is required to find higher order derivatives of the bearing forces with respect to journal velocity and position. As closed-form expressions for journal ...
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    Stability analysis of fluid film bearings under laminar and turbulent regimes 

    Gadala, Mohamed S; Hemmati, Farzad (IOP Publishing, 2018)
    Stability of short journal bearings is investigated in bith the linear and nonlinear regimes under laminar and turbulent operating conditions with consideration of drag force effects. Exerted forces on fluid film bearings ...
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    Dynamic analysis of short and long journal bearings in laminar and turbulent regimes, application in critical shaft stiffness determination 

    Hemmati, Farzad; Miraskari, Mohammad; Gadala, Mohamed S. (Elsevier, 2017-04)
    Linear and non-linear stability of a flexible rotor-bearing system supported on short and long journal bearings is studied for both laminar and turbulent operating conditions. The turbulent pressure distribution and forces ...
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    A robust modification to the universal cavitation algorithm in journal bearings 

    Gadala, Mohamed S.; Miraskari, Mohammad; Hemmati, Farzad; Jalali, Alireza; Gadala, Mohamed S.; ETAL. (American Society of Mechanical Engineers., 2017-05)
    In the current study, a modified fast converging, mass-conserving, and robust algorithm is proposed for calculation of the pressure distribution of a cavitated axially grooved journal bearing based on the finite volume ...
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    Rolling element bearing fault diagnostics using acoustic emission technique and advanced signal processing 

    Gadala, Mohamed S.; Alqaradawi, Mohamed; Hemmati, Farzad (Sage, 2015-06)
    Acoustic emission (AE) signal generated from defects in rolling element bearings are investigated using simulated defects and experimental measurements in this paper. Rolling element bearings are crucial parts of many ...
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    A robust modification to the universal cavitation algorithm in journal bearings 

    Miraskari, Mohammad; Hemmati, Farzad; Gadala. Mohamed S; ETAL.. (The American Society of Mechanical Engineers, 2016-11)
    In the current study, a modified fast converging, mass-conserving, and robust algorithm is proposed for calculation of the pressure distribution of a cavitated axially grooved journal bearing based on the finite volume ...
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    Rolling element bearing fault diagnostics using acoustic emission technique and advanced signal processing 

    Hemmati, Farzad; Alqaradawi, Mohammed; Gadala. Mohamed S (Sage, 2015-06)
    Acoustic emission (AE) signal generated from defects in rolling element bearings are investigated using simulated defects and experimental measurements in this paper. Rolling element bearings are crucial parts of many ...
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    Roller bearing acoustic signature extraction by wavelet packet transform, applications in fault detection and size estimation 

    Hemmati, Farzad; Orfali, Wasim; Gadala, Mohamed S. (Science Direct, 2015-11)
    Continuous online monitoring of rotating machines is necessary to assess real-time health conditions so as to enable early detection of operation problems and thus reduce the possibility of downtime. Rolling element bearings ...
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    Linear stability analysis of finite length journal bearings in laminar and turbulent regimes 

    Miraskari, Mohammad; Hemmati, Farzad; Gadala, Mohamed S.; ETAL.. (SAGE Journals, 2017-02)
    Dynamic coefficients of a finite length journal bearing are numerically calculated under laminar and turbulent regimes based on Ng–Pan–Elrod and Constantinescu models. Linear stability charts of a flexible rotor supported ...

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    Author
    Hemmati, Farzad (10)
    Miraskari, Mohammad (6)Gadala, Mohamed S. (5)ETAL.. (2)Gadala. Mohamed S (2)S. Gadala, Mohamed (2)Alqaradawi, Mohamed (1)Alqaradawi, Mohammed (1)ETAL. (1)Gadala, Mohamed S (1)... View MoreSubjectAcoustic emission (2)Bearings (2)Cavitation (2)De-noising (2)Fluid film lubrication (2)Hydrodynamic lubrication (2)Journal bearings (2)Nonlinear Bearing Model (2)Signal processing (2)wavelet packet transform (2)... View MoreDate Issued2015 (3)2017 (3)2018 (3)2016 (1)Has File(s)No (7)Yes (3)

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