12th International Conference on Vibrations in Rotating Machinery

Proceedings of the 12th Virtual Conference on Vibrations in Rotating Machinery (VIRM), 14-15 October 2020

Institute of Mechanical Engineers

• Publisher: CRC Press
• Year: 2020
• Print ISBN: 9780367677428
• eBook ISBN: 9781000318531
• Edition: 1
• Topic: Technology & Engineering
• Subtopic: Civil Engineering
• Index: Technology & Engineering

Since 1976, the Vibrations in Rotating Machinery conferences have successfully brought industry and academia together to advance state-of-the-art research in dynamics of rotating machinery. 12 th International Conference on Vibrations in Rotating Machinery contains contributions presented at the 12 th edition of the conference, from industrial and academic experts from different countries. The book discusses the challenges in rotor-dynamics, rub, whirl, instability and more. The topics addressed include:

- Active, smart vibration control
- Rotor balancing, dynamics, and smart rotors
- Bearings and seals - Noise vibration and harshness
- Active and passive damping
- Applications: wind turbines, steam turbines, gas turbines, compressors
- Joints and couplings
- Challenging performance boundaries of rotating machines
- High power density machines
- Electrical machines for aerospace
- Management of extreme events
- Active machines
- Electric supercharging
- Blades and bladed assemblies (forced response, flutter, mistuning)
- Fault detection and condition monitoring
- Rub, whirl and instability
- Torsional vibration

Providing the latest research and useful guidance, 12 th International Conference on Vibrations in Rotating Machinery aims at those from industry or academia that are involved in transport, power, process, medical engineering, manufacturing or construction.

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Table of Contents
• Organising Committee
• Identification of misaligned additive forces and moments of coupling in turbo-generator system integrated with an active magnetic bearing
• On the analysis of a rotor system subjected to rub using a continuous model
• Optimization of rotating machinery by BESO method
• Influence of thrust bearings in lateral vibrations of turbochargers under axial harmonic excitation
• Cylindrical roller bearing under elastohydrodynamic lubrication with localized defects modeling
• Analytical study of rotordynamic behaviour and rolling element bearing transient response in a high-speed race transmission
• Nonlinear analysis of hydrodynamic forces for multi-lobe bearings
• Some further reflections on misalignment
• Attenuating influence of time-delay on stability of rotors supported on active magnetic bearings
• Calculation procedure to derive the threshold of vibration stability of soft mounted induction motors with elastic rotors and sleeve bearings fixed on active motor foot mounts for arbitrary controller structures
• Experimental investigation on the static and dynamic characteristics of partially textured journal bearings
• Rotating machines featuring new rotor topology and internal actuation for vibration mitigation
• Effects of unbalance and AMB misalignment in a rigid rotor with an offset disc levitated by active magnetic bearings: A numerical investigation
• Modal parameters evaluation of a rolling bearing rotor using operational modal analysis
• Rotor-angular contact ball bearing system study using EHD lubrication and comparison with experimental tests
• Effect of journal bearing preload caused by bearing-housing interference fit on nonlinear vibration of a flexible rotor supported by a journal bearing
• Validation of the stochastic response of a rotor with uncertainties in the AMBs
• Active chatter suppression in robotic milling using H∞ control
• Fast estimation of classical flutter stability of turbine blade by reduced CFD modelling
• Suppression and control of torsional vibrations of the turbo-generator shaft-lines using rotary magneto-rheological dampers
• Coupling between axial, lateral and torsional vibration modes of a flexible shaft with flexible staggered blades
• Integration of parameter sensitivity to structural optimization of helicopter rotors for minimum vibration
• A parametric study into the effect of variability in clearance shape and bump foil stiffness distribution in foil-air bearings
• Uncertainties in the calibration process of blade tip timing data against finite element model predictions
• Parametric coupled instabilities of an on-board rotor subject to yaw and pitch with arbitrary frequencies
• On the foundation dynamics and the active control of flexible rotors via active magnetic bearings
• Vibration behaviour of a 11 kW two-pole induction motor mounted on elastic steel frame foundation with actuator system
• Hybrid crankshaft control: Reduction of torsional vibrations and rotational irregularities under non-stationary operation
• Improved reduction methodology for rotor-dynamic systems using Modified SEREP
• Effect of L/D ratio and clearance of 3-lobe taper land bearing on stability of flexible rotor system
• Data combination for a consolidated diagnosis of rotor and bearing faults
• Asynchronous rotor excitation system (ARES) – A new rotor dynamic test facility at Imperial College London
• Experimental investigation of non-linear stiffness behaviour of a rolling-element bearing
• An optimal frequency band selection for bearing fault diagnosis based on squared envelope analysis
• Improving the thrust bearing performance of turbocharger rotors using optimization methods and virtual prototypes
• Characteristics of a high speed thin film fluid lubricated bearing
• Simulation model to investigate effect of support stiffness on dynamic behaviour of a large rotor
• Identification of frame dynamics of vertically oriented high-speed steam generator using model update procedure for reduced-order model
• Comparison of different time integration schemes and application to a rotor system with magnetic bearings in MATLAB
• Vibration monitoring of a large rotor utilizing internet of things based on-shaft MEMS accelerometer with inverse encoder
• Mechanical design of rotor-bearing system in a high-speed 20 kW range extender for battery electric vehicles
• Computational rotordynamics considering shrink fits
• Analysis of the cavitation characteristics of elastic ring squeeze film damper
• Experimental research on vibration reduction of turbine blades with underplatform dampers under rotating state
• Rotor dynamics analysis of different bearing system configurations for a 30 kW high-speed turbocompressor
• Digital twin of induction motors for torsional vibration analysis of electrical drive trains
• A reduced semi-analytical gas foil bearing model for transient run-up simulations
• Stable turbocharger bearings
• AMrotor - A MATLAB® toolbox for the simulation of rotating machinery
• A review of important nonlinear phenomena in rotor vibration
• An experimental assessment of torsional and package vibration in an industrial engine-compressor system
• Author Index