new analysis model for rotor-bearing systems based

Mechanical and dynamic characteristics of bearing with

2016-8-1Abstract: Based on analysis of the structural and mechanical characteristics of the bearing with looseness on high-speed flexible rotor and the demand of dynamic optimal design for multi-supported flexible rotor the mechanism of non-straight change of stiffness of supporting structure caused by looseness on rotor-bearing system was researched

On Using the Transfer Matrix Formulation for Transient

2019-8-1for Transient Analysis of Nonlinear Rotor Bearing Systems A Liew N S Feng and E J Hahn School of Mechanical and Manufacturing Engineering University of New South Wales Sydney Australia For many years transfer matrices have been used to eval-uate the steady-state vibration response of linear rotor bear-ing systems

Automatic Balancing of Rotor

2012-8-29Automatic Balancing of Rotor-Bearing Systems 215 2 Active balancing and vibration control of rotating machinery Many methods for passive balancing have been proposed such as single plane two planes or multi-plane balancing These off-line balancing

New analysis model for rotor

2018-10-2The 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 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

Rotor dynamics and machinery vibrations

Undamped damped analysis damped unbalanced response stability We follow standards API 612/613/617/684 or according to customer standards We asses machinery vibrations Our analysis and calculations are based on many years of practical experience and experimental research activities in field of rotor dynamics and rotating machinery

Research Article Simple and Versatile Dynamic Model of

2019-7-31of this new SRB model in a typical real world analysis 2 Dynamic Model of the Spherical Roller Bearing A spherical roller bearing consists of a number of parts including a series of rollers a cage and the inner and outer raceways Describing each component in detail can result in a simulation model with a large number of degrees-of-freedom

On stability of rotordynamic systems with rotor–stator

Model-based methods that can be used to assess stability and thereby validate or refine a machine design more directly are therefore needed In this paper a theory is developed for model-based verification of dynamic stability in rotor systems undergoing stator contact and rub

A New Dynamic Model of Ball

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

Detection of Damage of Rotor

2017-1-23A new mathematical model technique for rotor-bearing systems is established Furthermore a model analysis on bearing system is carried out by using EDBA the defect frequencies and vibration amplitude responses of the rotor -bearing system are obtained

A 3D finite element

A generalized and efficient model for rotating anisotropic rotor-bearing systems is presented in this paper with full considerations of the system's anisotropy in stiffness inertia and damping Based on the 3D finite element model and the model order reduction method the effects of anisotropy in shaft and bearings on the forced response and whirling of anisotropic rotor-bearing systems are

Rotor

Previous Blog Next Blog Hello and welcome to the latest revolution in our series on rotor dynamics and bearing analysis This month we'll be looking at what steps need to be taken to accurately model a rotor train from the components on the rotors themselves to the bearings and structural components that support the entire machine

US Patent for Method for generating a simulation

A method for generating a simulation model to evaluate a flight control system including determining at least one high level requirement for an aircraft flight system during a non-automated engineering process generating at least one specification of the high level requirement generating a model computer-readable program code based on the at least one specification executing the model

Automatic Balancing of Rotor

2012-8-29Automatic Balancing of Rotor-Bearing Systems 215 2 Active balancing and vibration control of rotating machinery Many methods for passive balancing have been proposed such as single plane two planes or multi-plane balancing These off-line balancing

Method and device to investigate the behavior of

Vibration problems have been observed after the installation of large rotating machines such as electric machines and generators and paper machine rolls One possible cause can be differences between the foundation stiffness of the installation location and the testing platform where the machine is balanced and optimized Foundation stiffness exerts a significant effect on the behavior of a

Vibration Analysis of a Rotor considering Nonlinear

Moreover this model accounts for the nonlinear bearing reaction at every step of the rotating cycle of the rotor without iterative procedure 3 Analysis and Results Rotor dynamic analysis program based on new algorithm was developed using MATLAB to determine the transient response of a rotor under the static loads and unbalance forces

Advanced analysis of rotor

Multilevel analysis essential for systems such as aircraft jet engines and certain other classes of turbo machinery can be performed using this new computer program A post processor for viewing/animating the damped mode-shapes and force:d response of a rotor in 3-dimensions has been developed

On the Transient Analysis of Rotor

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

Improving critical speed calculations using flexible bearing

2014-7-18The analysis of machine vibration response based on rigid bearing supports predict critical speeds that are substantially higher than actual values [2 3] Nicholas and Barrett [2] found that for the four rotors analyzed neglecting support flexibility resulted in predicted first critical errors that range from 14 percent to 21 percent high and second critical errors that range from 40 percent

A New Rotor

2010-1-242 The New Rotor-Ball Bearing-Stator Coupling Dy-namics Model for Whole-Engine Vibration 2 1 Schematic of the New Model The new dynamic model for rotor-ball bearing-stator coupling system for whole-engine vi-bration is shown in Fig 1 at the two ends of which there are two same rolling bearings When rotor rotating great transverse bend-

Nonlinear dynamic response analysis on gear

2019-11-3A coupled lateral-torsional nonlinear dynamic model with 16-degree-of-freedom (16-DOF) of gear-rotor-bearing transmission system (GRBTS) is developed after comprehensive considering the nonlinear features associated with time-varying meshing stiffness backlash transmission error friction force input/output load gravity and gear eccentricity

Rotor Systems: Analysis and Identification

2017-12-7The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently the modern analysis methods for real life rotor systems This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and fault diagnostics and prognostics The book

Rotor Systems : Analysis and Identification (eBook

Rotor Systems : Analysis and Identification This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and fault diagnostics and prognostics and Dampers --chapter 4 Transverse Vibrations of Simple Rotor-Bearing-Foundation Systems --chapter 5

Dynamic Analysis Identification and Control Studies

A neural network based alternate control scheme also proposed to compute the required actuator forces ud In overall the work focussed on the dynamic analysis of dual disc rotor model subjected to parametric nonlinear bearing loads under the action of various external forces and some controller design aspects applicable to this rotor u

Dynamic modeling for rigid rotor bearing systems

2017-6-23A new 12DOF dynamic model for a rigid rotor bearing system is proposed • Time-varying excitations caused by a localized defect are formulated • A new method is presented to calculate additional deformations at defect sharp edges • Effects of housing support stiffness and defect sizes on vibrations of the system is studied

Vibration Analysis Of Rotating Machinery Matlab

Analysis software (in MATLAB) is associated with this book and novices to rotordynamics can expect to make good predictions of critical speeds and rotating mode shapes within days TURBINE-PAK is an advanced scientific software for vibration analysis of non-linear multi-bearing Rotor-Bearing-Foundation (RBF) systems

Rotor Systems: Analysis and Identification

2017-12-7The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently the modern analysis methods for real life rotor systems This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and fault diagnostics and prognostics The book

On Using the Transfer Matrix Formulation for Transient

2019-8-1for Transient Analysis of Nonlinear Rotor Bearing Systems A Liew N S Feng and E J Hahn School of Mechanical and Manufacturing Engineering University of New South Wales Sydney Australia For many years transfer matrices have been used to eval-uate the steady-state vibration response of linear rotor bear-ing systems