logo

New analysis model for rotor bearing systems based on

If you want to confirm some technical details before you order,
just need to send a message or e-mail: [email protected].
Then our professional sales staff will contact you within 2 hours.

Finite Element Method Applied to the Eigenvalue Analysis .

This work deals with a finite element procedure developed to perform the eigenvalue analysis of damped gyroscopic systems, represented by flexible rotors supported on fluid film journal bearings. The rotor finite element model is based on the Timoshenko beam theory, accounting for the shaft rotary inertia and gyroscopic moments. The governing equations for the hydrodynamic journal bearing are ...

New analysis model for rotor-bearing systems based on plate .

New analysis model for rotor-bearing systems based on plate theory Zhinan ZHANG 1, Mingdong ZHOU 2 (), Weimin DING 3, Huifang MA 4 1. School of Mechanical ...

New analysis model for rotor-bearing systems based on .

The purpose of this work is to develop a new analysis model for angular-contact, ball-bearing systems on the basis of plate theory instead of commonly known approaches that utilize spring elements.

New analysis model for rotor-bearing systems based on .

Axial and radial stiffness on an annular plate are developed based on plate, Timoshenko beam, and plasticity theories. The model is developed using theoretical and inductive methods and validated through a numerical simulation with the finite element method. The new analysis model is suitable for static and modal analyses of rotor-bearing systems.

The NARX Model-Based System Identification on Nonlinear .

is required in the identification of a system0s NARX model, for nonlinear, rotor-bearing systems, a new multi-harmonic input based model identification approach is introduced. Moreover, the identification results of NARX models on the nonlinear, rotor-bearing systems are validated under

Nonlinear dynamic analysis of a complex dual rotor-bearing .

In this paper, a dynamic model of a complex dual rotor-bearing system of an aero-engine is established based on the finite element method with three types of beam elements (rigid disc, cylindrical beam element and conical beam element), as well as taking into account the nonlinearities of all of the supporting rolling element bearings.

A Nonlinear Analysis of a Flexible Unbalanced Cracked .

The major interest of presenting this model is that it allows to analyses the effect of a transverse cracks on the dynamic response of a hydrodynamic journal bearing system. Analysis of transverse cracks defects, on the stability and the dynamic behavior of the rotor-bearing system and further certain operating conditions were performed by ...

NONLINEAR MODELING OF TILTING-PAD BEARINGS WITH .

NONLINEAR MODELING OF TILTING-PAD BEARINGS WITH APPLICATION TO A FLEXIBLE ROTOR ANALYSIS ... commonly used in standard analyses of rotor-bearing systems. Based on assumption of small shaft ...

Frequency and Stability Analysis Method of Asymmetric .

Frequency and Stability Analysis Method of Asymmetric Anisotropic Rotor-Bearing System Based on Three-Dimensional Solid Finite Element Method. ... Generalized Polynomial Expansion Method for the Dynamic Analysis of Rotor-Bearing Systems. J. Eng. Gas Turbines Power (April, 1993)

Bearing Looseness Fault Characteristics Analysis of Rotor .

Support or pedestal looseness fault exists in mechanical system typically.A new dynamical model of an eccentric motor rotor system with a piecewise-linear stiffness was proposed, and the incremental harmonic balance method was employed to obtain analytic solutions of the model. Then, the time domain waveform and amplitude spectrogram were achieved by applying the analytic solutions to program ...

On the Transient Analysis of Rotor-Bearing Systems .

The transient dynamic response of a flexible rotor in nonlinear supports has been investigated using time marching methods. Several marching techniques such as Newmark β, Wilson θ, and Houbolt have been utilized in this study of rotor-bearing dynamic systems, to examine the stability of the system, and the suitability of each technique for predicting the onset of instability.

Nonlinear Dynamic Analysis and Experiment Verification of .

Nonlinear Dynamic Analysis and Experiment Verification of Rotor-Ball Bearings-Support-Stator Coupling System for Aeroengine With Rubbing Coupling Faults ... 1995, “Chaotic Responses of Unbalance Rotor Bearing Stator Systems With Looseness or Rubs ... Unbalance Identification in Large Steam Turbo-Generator Unit Using a Model-Based Method ...

A New Dynamic Model of Ball-Bearing Rotor Systems based on .

PDF | Ball-bearing rotor systems are key components of rotating machinery. In this work, a new dynamic modeling method for ball-bearing rotor systems is proposed based on rigid body element (RBE).

Backward-Auto-Regressive Model Based Rotor-Bearing System .

This paper focus on rotor-bearing system parameter identification with impulse excitation in horizon and vertical which is based on Backward -auto-regressive model. Singular value decomposition is applied to reduce the noise and the proper AR model order and de-noising threshold are selected. In this paper, the damping ratio is identified within the different rotating speed and different ...

DYNAMIC ANALYSIS OF FLEXIBLE ROTOR BASED ON .

The wavelet finite element model of flexible rotor-bearing systems is also built up and the effects of gyroscopic moments, rotary inertia, hysteric and viscous internal ...

A New Dynamic Model of Ball-Bearing Rotor Systems Based on Rigid Body Eleme

Ball-bearing rotor systems are key components of rotating machinery. In this work, a new dynamic modeling method for ball-bearing rotor systems is proposed based on rigid body element (RBE). First, the concept of RBE is given, and then the rotor is divided into several discrete RBEs.

A New Analysis Tool Assessment for Rotordynamic Modeling .

A New Analysis Tool Assessment for Rotordynamic Modeling of Gas Foil Bearings NASA/TM—2010-216354 ... Design of such systems, however, is currently more of an art than a science because of ... to measured response to accurately model the dynamics of a rotor bearing system. Nomenclature