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Proceedings of the 11th IFToMM International Conference on Rotordynamics : Volume 1 / / edited by Fulei Chu, Zhaoye Qin
| Proceedings of the 11th IFToMM International Conference on Rotordynamics : Volume 1 / / edited by Fulei Chu, Zhaoye Qin |
| Autore | Chu Fulei |
| Edizione | [1st ed. 2024.] |
| Pubbl/distr/stampa | Cham : , : Springer International Publishing : , : Imprint : Springer, , 2024 |
| Descrizione fisica | 1 online resource (558 pages) |
| Disciplina |
621.8
621.82 |
| Altri autori (Persone) | QinZhaoye |
| Collana | Mechanisms and Machine Science |
| Soggetto topico |
Machinery
Mechanics, Applied Control engineering Robotics Automation Machinery and Machine Elements Engineering Mechanics Control, Robotics, Automation |
| ISBN | 3-031-40455-6 |
| Formato | Materiale a stampa  |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
Intro -- Preface -- Contents -- Dynamic Analysis and Safety Design for Aero-Engine Rotor-Support System Under the Blade-off -- 1 Introduction -- 2 Dynamic Model of Rotor-Support System with Blade-Off -- 2.1 Structural Characteristics of Power Turbine Rotor and Support Structure -- 2.2 Physical Process of Turbine Blade-Off Event -- 2.3 Dynamic Model and Governing Equations -- 2.4 Solution Flow of the Governing Equation Based on Explicit Dynamic -- 3 Dynamic Analysis of the Rotor-Support System -- 3.1 Modal Characteristics of the System -- 3.2 Dynamic Response of the System Under the Turbine Blade-Off -- 4 Safety Design for the Rotor-Support System -- 4.1 Structure Design -- 4.2 Update of the Dynamic Model -- 4.3 Dynamic Analysis -- 5 Conclusions -- References -- Application of Metamaterial in Vibration Suppression of Rotor System -- 1 Introduction -- 2 Fundamental Design Methods of Vibration Isolators and Absorbers for Rotor System -- 3 Inerter Enhanced Meta-shaft -- 3.1 Structure of the Inerter Enhanced Meta-shaft -- 3.2 Intermediate Wheel Drive Amplification Mechanism -- 3.3 Dynamic Equations of the Proposed Meta-shaft -- 3.4 Vibration Transmission Loss and Band Gap Analysis -- 4 Experimental Study -- 4.1 Experiment Setup -- 4.2 Experiment Results -- 5 Conclusions -- References -- A Novel Approach to Model the Shrink-Fit Connection -- 1 Introduction -- 2 Analytical Modeling -- 3 Discussion -- 3.1 Comparison with FEM -- 3.2 Parameter Study -- 4 Conclusion -- References -- Numerical Analysis of the Effect of Different Surface Textures on the Steady State Characteristics of Tilting Pad Journal Bearings -- 1 Introduction -- 2 Governing Equation -- 2.1 The Reynolds Equation -- 2.2 Moment on Pad -- 2.3 Thermal Effects -- 2.4 Elastic Deformation -- 2.5 Lubricant Film Thickness -- 3 Numerical Method -- 4 Results and Discussion.
4.1 Validation of the Model -- 4.2 Effect on Pressure -- 4.3 Effect on Maximum Temperature -- 4.4 Effect on Bearing Capacity -- 5 Conclusion -- References -- Effect of Support Parameters on the Vibrations of a Cracked Rotor Passing Through Critical Speed -- 1 Introduction -- 2 Rotor System Model -- 3 Results and Discussion -- 3.1 Validation of Results -- 3.2 Support Parameter Study -- 4 Conclusion -- References -- Active Suppression of Multi-frequency Vibration of Rotor Based on Adaptive Immersion & -- Invariant Theory -- 1 Introduction -- 2 Method -- 2.1 Model of Rotor-Bearing-AMA System -- 2.2 Adaptive Immersion and Invariance Theory -- 2.3 Design of Controller -- 3 Experiments -- 3.1 Description of Test Rig -- 3.2 Results at Multi Speeds -- 3.3 Comparison of PD-I& -- I and PD Algorithms with Different Parameters -- 4 Conclusion -- References -- Simulation Study for Hole Diaphragm Labyrinth Seal at Synchronous Whirl Frequency -- 1 Introduction -- 2 Model Establishment -- 3 Results and Discussion -- 4 Conclusions -- References -- Effect of Flow Rate on the Performance of an Evacuated Tilting Pad Journal Bearing: Load on Pad vs. Load-Between-Pad Configurations -- 1 Introduction -- 2 Description of Test Rig and Bearings -- 3 Experimental Procedure -- 4 Experimental Results and Discussion -- 4.1 Bearing Eccentricity -- 4.2 Pad Temperatures and Oil Exit Temperature -- 4.3 Force Coefficients for LOP and LBP Bearings with Evacuated Ends -- 5 Conclusion -- References -- Dynamic Performance of an O-Ring Sealed Squeeze Film Damper and a Simple Way to Estimate the (Ingested) Gas Content in a Squeeze Film -- 1 Introduction -- 2 Appraisal of Prior Work -- 3 Description of Test Rig, SFD and Seals -- 4 Test Procedure and Identification of Force Coefficients -- 5 Force Coefficients for O-rings -- 6 Force Coefficients for Sealed SFD. 7 Estimation of Gas Volume Fraction in O-ring Sealed Damper -- 8 Conclusion -- References -- Bearing Fault Diagnosis Using Transfer Learning with ICCEMDAN -- 1 Introduction -- 2 Signal Processing Methods -- 3 Convolutional Neural Network Model and Transfer Learning Model -- 3.1 1-D VGG16 Convolution Neural Network Model -- 3.2 1-D VGG16 Transfer Learning Model -- 3.3 This Paper Presents a Method -- 4 Experimental Verification -- 4.1 Description of Experimental Data Set -- 4.2 Data Preprocessing -- 4.3 Experiments and Results -- 5 Conclusion -- References -- Dynamic Modeling and Stability Analysis of the Rod-Fastening Rotor System with the Different Preload Status -- 1 Introduction -- 2 Modeling of RFCR System -- 2.1 Structure of Tie-rod Combined Rotor -- 2.2 Motion Equation of Tie-rod Combined Rotor -- 3 Numerical Results and Discussion -- 3.1 Validation -- 3.2 Nonlinear Dynamics Comparison of RFCR Under Different Preload Conditions -- 4 Conclusions -- Appendix A -- Appendix B -- References -- Modeling Rotordynamic Effects of Angular Contact Ball Bearing in X- and O-arrangements with Full Bearing Matrix -- 1 Introduction -- 2 Theoretical Background -- 2.1 System Equations -- 2.2 3D Solid FE and Spiderweb Beam Elements -- 2.3 Ball Bearing Stiffness Formulation -- 3 Results and Discussions -- 4 Conclusions -- References -- Research on the Nonlinear Response of the Rotor System with Bolted Joint with Spigot -- 1 Introduction -- 2 Mechanical Model of Slip Damage at the Spigot Interface -- 2.1 The Distribution Function of Slippage at the Spigot Interface -- 2.2 Force-Displacement Relationship of Spigot Interface -- 3 Dynamic Characteristic of the Non-continuous Rotor System -- 3.1 The Rotor Example -- 3.2 The Slip Damage -- 3.3 Discussion -- 4 Conclusion -- References. On the Influence of the Lubricant Feed Orifice Size and End Plate Seals' Clearance on the Static and Dynamic Performance of Integral Squeeze Film Dampers -- 1 Introduction -- 2 Analysis -- 3 Fluid Film Pressure Field and Lubricant Flow Rate -- 4 Dynamic Force Coefficients -- 5 Conclusion -- References -- Dropdown Analysis of High-Speed Thin-Shaft Coupled Rotor System Integrated with Three Active Magnetic Bearings -- 1 Introduction -- 2 Mathematical Modelling of Thin-Shaft Coupled Rotor-AMB System with TDBs -- 2.1 Equations of Motion of Rotor System -- 2.2 AMB Support System Model -- 2.3 Touchdown Bearing Force Model -- 2.4 Overall Equation of Motion of Rotor-AMB System Integrated with TDBs -- 3 Dropdown Analysis of the Developed System Model -- 3.1 Test Rig Description and Simulation Model -- 4 Results and Discussions -- 4.1 Displacement Response for Dropdown at Spin Condition (ω = 50 Hz, Anticlockwise), Without Unbalance -- 4.2 Displacement Response for Dropdown at Spin Condition (ω = 50 Hz, 100 Hz and 150 Hz Anticlockwise), with Unbalance -- 5 Conclusions -- References -- Parametric Analysis of Journal Bearings with Chevron Textures on the Shaft Surface -- 1 Introduction -- 2 Mathematical Model -- 3 Parametric Analysis -- 4 Conclusion -- References -- Prediction of Remaining Useful Life of Passive and Adjustable Fluid Film Bearings Using Physics-Based Models of Their Degradation -- 1 Introduction -- 2 Materials and Methods -- 2.1 Subject -- 2.2 Approach to Considering the Bearing Degradation -- 3 Results and Discussion -- 4 Conclusion -- References -- Application of Machine Learning in Simulation Models and Optimal Controllers for Fluid Film Bearings -- 1 Introduction -- 2 Modeling and Methods -- 3 Results and Discussion -- 3.1 Approximation of FFB Models -- 3.2 Data Driven FFB Models in Control Tasks -- 4 Conclusion -- References. Study on Solution Algorithm of Reynolds Equation of Self-acting Gas Journal Bearings Based on Finite Difference Method -- 1 Introduction -- 2 Static Reynolds Equation for Self-acting Gas Bearing -- 2.1 Algorithm of Numerical Solution -- 2.2 Typical Algorithm of Numerical Solution -- 2.3 New Algorithm of Numerical Solution -- 3 Program Verification -- 4 Algorithm Comparison -- 5 Conclusion -- References -- The Dynamic Equilibrium Surfaces Calculation in the Liquid Friction Conical Bearings -- 1 Introduction -- 2 Modelling the Rotor-Bearing System -- 3 Results and discussion -- 4 Conclusions -- References -- Early Warning Signal Based on Global Dynamics for Instability Responses in Rotor/Stator Rubbing System -- 1 Introduction -- 2 Global Dynamics in Rotor/Stator Rubbing System -- 2.1 Rotor/Stator Rubbing Model -- 2.2 Global Dynamic Structures with Slow-Varying Parameters -- 3 Multi-level Warning Indicator -- 4 Early Warning of Instability Responses in the Rotor System -- 5 Conclusion -- References -- Research on Rub-Impact Fault Quantification of Rotor System Based on Effective Singular Value Noise Reduction and Minimum Mutual Entropy Principle -- 1 Introduction -- 2 Related Theories -- 2.1 SVD -- 2.2 MMEP -- 2.3 Calculation the Number of Effective Singular Value -- 3 Performance of the Improved Method -- 3.1 Simulation Results -- 3.2 Experiment Results -- 4 Fault Quantification -- 5 Conclusion -- References -- Influence of Slight Gravitational Effect on the Characteristics of Onset Speeds of Instability and Stability in the Vertical Rotating Shaft Supported by Journal Bearing -- 1 Introduction -- 2 Theoretical Analysis -- 2.1 Model and Equations of Motion (EOM) -- 2.2 Shooting Method [5, 6] -- 3 Results and Discussion -- 3.1 Characteristic Curves Under Different Values of Drift -- 3.2 Discussion -- 4 Conclusions -- References. Investigation of Journal Gas Foil Bearing Characteristics with Foils Prestress from Assembling Taken into Account. |
| Record Nr. | UNINA-9910760266903321 |
Chu Fulei
|
||
| Cham : , : Springer International Publishing : , : Imprint : Springer, , 2024 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||
Proceedings of the 11th IFToMM International Conference on Rotordynamics : Volume 2 / / edited by Fulei Chu, Zhaoye Qin
| Proceedings of the 11th IFToMM International Conference on Rotordynamics : Volume 2 / / edited by Fulei Chu, Zhaoye Qin |
| Autore | Chu Fulei |
| Edizione | [1st ed. 2024.] |
| Pubbl/distr/stampa | Cham : , : Springer International Publishing : , : Imprint : Springer, , 2024 |
| Descrizione fisica | 1 online resource (494 pages) |
| Disciplina |
621.8
621.82 |
| Altri autori (Persone) | QinZhaoye |
| Collana | Mechanisms and Machine Science |
| Soggetto topico |
Machinery
Mechanics, Applied Control engineering Robotics Automation Machinery and Machine Elements Engineering Mechanics Control, Robotics, Automation |
| ISBN | 3-031-40459-9 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
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. |
| Record Nr. | UNINA-9910760261203321 |
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Chu Fulei
|
||
| Cham : , : Springer International Publishing : , : Imprint : Springer, , 2024 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||