Proceedings of the 11th IFToMM International Conference on Rotordynamics

Name: Proceedings of the 11th IFToMM International Conference on Rotordynamics | Volume 2
Brand: Springer
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Volume 2

Fulei Chu Zhaoye Qin(Editor)

Springer (Publisher)

1st Edition

Published on 23. August 2023

X, 484 pages

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978-3-031-40459-7 (ISBN)

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Content

Intro
Preface
Contents
Numerical Analysis of Seal Force Under Brush Seal Hysteresis Effect
1 Introduction
2 Seal Force Analysis
2.1 Hysteresis Effect
2.2 Seal Force Model
3 Result and Discussion
3.1 Influence of Hysteresis Effect on Brush Seal Force
3.2 Influence of Brush Inclination Angle on Seal Force Under Hysteresis Effect
4 Conclusions
References
Investigation on Nonlinear Behavior of a Rotor System with Friction Effect Due to End-Face Seal
1 Introduction
2 Modeling of Offset Disc Rotor-End Seal System
2.1 Mechanical Model of Rotary/Static End Seal
2.2 Dynamic Equation of Offset Disc Rotor-End Seal System
3 Vibration Response Analysis of Rotor System
3.1 Rotor System Parameters and Calculation of Inherent Characteristics
3.2 Response Characteristics of Rotor System Under Excitation Force of End Face Seal
4 The Influence of Key Parameters on Rotor Vibration Response
4.1 Influence of Rotor Parameters
4.2 The Influence of Sealing Mechanical Parameters
5 Conclusion
References
Analysis and Safety Design of Aero-Engine Rotor Dynamic Response with Multiple Loads Due to Fan Blade off
1 Introduction
2 Description of Rotor Load Characteristics After FBO
3 Action Mechanism of Multiple Loads with FBO
3.1 Sudden Unbalance Load
3.2 Inertial Asymmetric Disk
3.3 Rub-Impact Excitation
3.4 Rotor Dynamics Model with Multiple Loads
4 Modeling and Analysis Method of Low-Pressure Rotor
4.1 Establishment of Low-Pressure Rotor Model
4.2 Dynamic Response Analysis Method
5 Analysis of Rotor Dynamic Response with Multiple Load Excitation
5.1 Inertia Symmetric Rotor
5.2 Inertia Asymmetric Rotor
6 Safety Design of Support Structure
6.1 Safety Design Strategy
6.2 Effect of Reducing Support Stiffness
6.3 Effect of Increasing Support Damping
7 Conclusion
References
Numerical Simulation of Aero-Engine Rotor-Blade-coating Coupling System with Rub-impact Fault and Its Dynamic Response
1 Introduction
2 Rub-impact and Rotor Dynamic Modeling
2.1 Rub-impact Modeling
2.2 Solution Process Analysis
2.3 Rotor System Modeling
2.4 Model Validation
3 Results and Discussions
3.1 Analysis of Rub-impact Simulation
3.2 Rub-impact Results Analysis Under Different Coating Materials
3.3 Rub-impact Results Analysis Under Different Invasion Depth
3.4 The Dynamic Response of Rotor System with Rub-impact Fault
4 Conclusions
References
Modeling and Simulation Analysis of Dual-Rotor System in the Early Stage of Bearing Pedestal Looseness
1 Introduction
2 Dynamic Modeling of Bearing Pedestal Looseness in Dual-Rotor System
3 Analysis of Dual-Rotor System in the Early Stage of Bearing Pedestal Looseness
3.1 Simulation Analysis of the Dynamics of the Dual-Rotor System at the Early Stage of Bearing Pedestal Looseness
3.2 Experimental Analysis of the Dynamics of the Dual-Rotor System at the Early Stage of Bearing Pedestal Looseness
4 Conclusion
References
Similarity Design and Behavior Prediction of Rotor Systems Subject to Non-uniform Preloads
1 Introduction
2 Continuous Structure Treatment
2.1 Contact Mechanics Modeling
2.2 Structural Continuity Modeling Method
3 Similarity Theory
4 Modeling and Verification
4.1 Results of Case 1
4.2 Results of Case 2
4.3 Results of Case 3
5 Conclusions
References
Vibration Reduction Optimization Design of an Energy Storage Flywheel Rotor with ESDFD
1 Introduction
2 Dynamical Model
2.1 Two-Dimensional Friction Model
2.2 Dynamics Model of the Flywheel Rotor with ESDFDs
3 Optimization Design of Flywheel Rotor System with ESDFDs
3.1 Design Parameters
3.2 Constraint Condition
3.3 Objective Function
3.4 Optimization Design Based on MPSO
4 Results and Discussion
5 Conclusions
References
Sensitivity of Spline Self-excited Vibration to Structure Parameters
1 Introduction
2 Analytical Model
2.1 Spline Stiffness
2.2 Spline Damping
2.3 Spline-Rotor System
2.4 System Parameter
3 Influence of Each Parameter on the Self-excited Vibration of the System
3.1 Number of the Spline Teeth
3.2 Spline Module
3.3 Spline Pressure Angle
3.4 Spline Width
4 Conclusions
References
Parametric Optimization of BNES in Torsional Vibration Suppression of Rotor Systems
1 Introduction
2 BNES Structure and System Dynamic Equations
2.1 BNES Structure
2.2 Magnet Restoring Force
2.3 Dynamic Model of the Rotor-BNES System
3 Parameter Optimization and Result Analysis
3.1 Parameter Setting
3.2 Parameter Optimization Under Transient Response
3.3 Vibration Reduction Analysis Under Transient Response
3.4 Parameter Optimization Under Steady-State Responses
3.5 Vibration Reduction Analysis Under Steady-State Response
4 Experimental Research
4.1 Experimental Set-Up for BNES Effectiveness
4.2 Experimental Results
5 Conclusions
References
Aviation Spline Wear Test Bench and Fretting Wear Measurement
1 Introduction
2 Spline Wear Test Bench
3 Functional Analysis of the Test Bench
3.1 Implementation of Angular Misalignment
3.2 Spline Torque Application and Feedback Measurement
4 Wear Measurement
5 Test Result Analysis
6 Conclusion
References
Dynamic Analysis of the Finger Seal-Rotor System
1 Introduction
2 Method
2.1 Geometric Relationship
2.2 Interaction Between Seal Laminates
2.3 Finger Seal-Rotor System
3 Results and Discussion
4 Conclusion
References
Investigation on Information Assessment for Vibration Sensor Locations Installed in Aero-Engine Based on Unbalance Response Analysis
1 Introduction
2 Model Description
3 Method
3.1 Method for Vibration Sensors Preliminary Information Assessment Evaluation
3.2 Clarification of Vibration Sensors Information Assessment Based on Unbalance Response Analysis
4 Simulation Results
4.1 Model Set Up
4.2 Vibration Sensors Preliminary Information Assessment Evaluation
4.3 Vibration Sensors Information Assessment Clarification based on Unbalance Response Analysis
5 Conclusion
References
Torsional Vibration Modelling of a Two-Stage Closed Differential Planetary Gear Train
1 Introduction
2 Torsional Model
2.1 Relative Displacements
2.2 Meshing Error Excitation
2.3 Equations of Motion
3 Results and Discuss
3.1 Stability Time-Domain Response
3.2 Coupling Analysis
3.3 Torsional Vibration Analysis
4 Conclusions
References
Research on Robustness Analysis and Evaluation Method of Bearing-Support System
1 Introduction
2 Structure System and Load
2.1 Composition of Structural System
2.2 Interface Contact Characteristic
2.3 Load Environment
3 Damage and Failure Analysis of Bearing-Support System
3.1 Failure Mode
3.2 Structural System Robustness Evaluation Method
4 Examples of Robustness Evaluation
4.1 Modeling of Bearing-Support System
4.2 Damage Evaluation Under Assembly and Centrifugal Load
4.3 Damage Evaluation Under Periodic Impact Excitation
4.4 Damage Evaluation Under Lateral Load
4.5 Damage Evaluation Under Maneuvering Flight
5 Conclusion
References
Investigation on the Transient Lateral Vibration of a Flexible Rotor System with Substantial Unbalance
1 Introduction
2 Dynamic Modeling of a Flexible Rotor with Substantial Unbalance
2.1 Finite Element Modeling of Rotor System
2.2 Model of Disk with Substantial Unbalance
2.3 Governing Equation of Whole Rotor System
3 Mode and Stability Analysis of the Flexible Rotor System
4 Transient Responses of the Flexible Rotor System
4.1 Linear Case
4.2 Nonlinear Case
5 Conclusions
References
Dynamic Behaviors of a Bolted Joint Rotor System Considering the Contact State at Mating Interface
1 Introduction
2 Nonlinear Mechanical Modeling of Bolted Joint Structure
3 Dynamic Modelling of the Bolted Joint Rotor
4 Numerical Simulation Results and Discussions
5 Experimental Study
6 Conclusions
References
Identification of High-Speed Gear Traveling Wave Resonance Based on Phase Space Reconstruction Method
1 Introduction
2 Methodology of the PSCOR
3 Experimental Design on High-Speed Gear TWR
4 TWR Characteristics of the Experimental Gear
4.1 Instantaneous Displacement Characteristics
4.2 Dynamic Stress Characteristics
5 Experimental Validation of the Proposed Method
5.1 Time-Frequency Response of the Captured Experimental Strains
5.2 Identification of the TWR by PSCOR
6 Conclusion
References
Rotordynamics of a Vibroflot
1 Introduction
2 Numerical Model
2.1 Electro-Magnetic Model
2.2 Multi-rotor Model
2.3 Global Model Assembly
3 In-situ Experimental Investigation
4 Results and Comparison with In-situ Experiments
5 Conclusion and Perspectives
References
Complex Stable and Unstable Subharmonic Vibrations of a Nonlinear Brush-Seal Rotor System
1 Introduction
2 Governing Equations
2.1 Nonlinear Brush-Seal Rotor Models
3 Results
3.1 Subharmonic Vibration Prediction
3.2 Subharmonic-1/3 and 1/7 Vibration
3.3 Subharmonic Vibration Illustration
4 Conclusion
References
Multi-objective Optimization of Active Dry Friction Damper-Rotor Systems Based on Predictive Control
1 Problem Formulation
1.1 Dynamic Modeling of the ADFDs-rotor System
1.2 Development of the Controller and Observer
1.3 Optimization Method
2 Results and Discussions
2.1 The Accuracy of the AKF and Surrogate Models
2.2 Results of Optimization
2.3 Comparison with Classical Direct Optimization Methods
3 Conclusions
References
Applying Central Manifold Theory in the Definition of Active Gas Foil Bearing Configurations for High-Speed Stability of Rotors
1 Introduction
2 Analytical Model of the Rotor-AGFB System
2.1 Solution of the Elasto-Aerodynamic Model for the AGFB Lubrication
3 Center Manifold Theory at the Hopf Bifurcation of Fixed-Point Equilibria
4 AGFB Configurations to Locate Hopf Bifurcations and Determine the Type of Instability
4.1 Configuration Patterns with One Control Input
4.2 Configuration Patterns with Multiple Control Inputs
5 Conclusions
References
Locating Period Doubling and Neimark-Sacker Bifurcations in Parametrically Excited Rotors on Active Gas Foil Bearings
1 Introduction
2 Analytical Model of the Parametrically Excited Rotor with AGFBs
2.1 Elastoaerodynamic Lubrication and Resulting Gas Forces
2.2 Condensed Rotor Model
2.3 Composition of the Parametrically Excited Rotor-Bearing System
3 Quality of Bifurcations of the Dynamic System
3.1 Location and Continuation of Limit Cycles
3.2 Location and Continuation of Codim1 Bifurcations of Limit Cycles
4 Results
5 Conclusions
Appendix: Implementation of Parametric Excitation
References
Dynamic Design of the High-Speed Rotor System Considering the Distribution of Strain Energy
1 Introduction
2 Modeling of High-Speed Rotor
2.1 Strain Energy Distribution of High-Speed Rotor
2.2 Dynamical Model
3 Design on the Critical Speed
3.1 Correlation Between Drum Strain Energy and Bending Modal Frequency
3.2 The Influence of Strain Energy Distribution on Gyroscopic Effect
4 Optimization of the Reaction Force at Bearing
4.1 Generating Mechanism of Reaction Force at Bearing
4.2 Correlation Between Strain Energy and Reaction Force at Bearing
4.3 Design on Practical Rotor Based on Strain Energy Distribution
5 Conclusion
References
Optimization of Journal Bearings Considering Their Adjustable Design and Rotor Dynamics
1 Introduction
2 Models and Methods
2.1 Mathematical Model of the Rotor-Bearing System
2.2 Description of the Optimization Problem
3 Results and Discussion
3.1 Solution of the Optimization Problem
3.2 Solution Analysis
4 Conclusions
References
Stability Margin Optimization for Unsymmetrical Rotor/Stator Dynamic System
1 Introduction
2 Mathematical Model
3 Numerical Implementation
4 Simulation and Optimization
5 Conclusion
References
Remaining Useful Life Prediction for Anti-friction Bearings Based on Envelope Spectrum and Extended Kalman Filter
1 Introduction
2 Experimental Settings [7]
3 Methodology
3.1 Fault Detection Based on Envelope Spectrum
3.2 Bearing Health Indicator
3.3 RUL Prediction at FIT
4 RUL Prediction Results
5 Conclusions
References
New Comprehensive Approach for Torsional Analyses of Industrial Powertrains
1 Introduction
2 New Comprehensive Approach
2.1 Main Distinction
2.2 Modelling
2.3 Damping
2.4 Modularity
2.5 Connection of Component Models
2.6 Boundary Conditions
2.7 Initial Values
2.8 Solution
2.9 Natural Frequencies and Damping
3 Calculation Example
3.1 Example Powertrain
3.2 Calculation Model
3.3 Steady-State Response
3.4 Natural Frequencies and Damping
3.5 Start-Up
3.6 Two-Phase Short-Circuit
3.7 Premature Breaker Reclosing
3.8 Comparison
4 Discussion
5 Conclusions
References
Modeling of the Divergently Worn Annular Seal for the Two-Way Coupled Fluid-Structure Interaction Analysis of Shaft Vibration and Clearance Flow
1 Introduction
2 CFD analysis for boundary condition parameter estimation
2.1 Estimation of pre-swirl ratio
2.2 Estimation of loss coefficient
3 FSI analysis for divergent tapered annular seal
3.1 Rotor system model
3.2 Clearance flow analysis
4 Results and discussion
4.1 Pre-swirl Ratio
4.2 Inlet Loss Coefficient
4.3 Onset Speed of Instability
5 Conclusion
References
Vibration Control of Rotor Bearing Systems Using Electro and Magneto Rheological Elastomers
1 Introduction
2 Dynamic Modeling of a Rotor Bearing System with a Smart Elastomer Ring Insert
2.1 Static and Dynamic Modeling of a Passive Bearing Elastomer Ring Insert
2.2 Dynamic Modeling of the Rheological Elastomer Ring
2.3 Modeling of a Bearing with an ERE/MRE Ring Insert
2.4 Modeling of a Rotor Bearing System Using Electrorheological (ER) and Mangetorheological (MR) Elastomer Ring Supports
3 Effect of the ER/MR Field on the Rotor-Bearing System Response
4 Conclusion
References
A New Type of Inerter Nonlinear Energy Sink Using Chiral Metamaterials
1 Introduction
2 Design of CINES
2.1 Chiral Metamaterial Inerter Mechanism
2.2 Piecewise Linear NES
2.3 Structure of CINES
3 Dynamic Model of the Rotor-CINES System
3.1 Model Analysis
3.2 Dynamic Model Establishment
4 Simulations and Discussions
4.1 Parameters Definitions
4.2 Transient Torsional Vibration
4.3 Steady-State Torsional Vibration
5 Experimental Validation and Discussion
5.1 Experimental Setup
6 Conclusions
References
Vibration Characteristic Analysis and Optimization of the Propulsion Shaft in the Underwater Vehicle
1 Introduction
2 Model Description
2.1 Scientific Problem
2.2 Analyze Model of the Propulsion Shaft System
2.3 Rubber Isolator Design
3 Vibration Characteristic Analysis
3.1 Characteristic Frequencies Analysis
3.2 Harmonic Responses of the Propulsion Shaft System
3.3 Vibration Isolation Analysis
4 Conclusions
References
Computation of Components System Stiffness for Variable Stator Vane Mechanism
1 Introduction
2 Kinematic and Stiffness Models
2.1 Research Object Extraction
2.2 Kinematic Model
2.3 Stiffness Model
3 Simulation and Validation
3.1 Components System Stiffness Model Validation
3.2 Influence of Gravity on Stiffness
4 Conclusion
References
An Unbalance Identification Method of a Whole Aero-Engine Based on the Casing Vibrations
1 Introduction
2 Theoretical Methods
2.1 Rotor-Casing Modeling
2.2 Rotor-SFD-Casing Modeling
2.3 Unbalance Identification Method of a Nonlinear System
3 Simulation Verification
3.1 Rotors-SFDs-Casing System
3.2 Unbalance Exists in the HP Rotor
3.3 Unbalance Exists in the LP and HP Rotors
4 Conclusion
References
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Proceedings of the 11th IFToMM International Conference on Rotordynamics

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