This book presents the papers from the 10th International Conference on Vibrations in Rotating Machinery. This conference, first held in 1976, has defined and redefined the state-of-the-art in the many aspects of vibration encountered in rotating machinery. Distinguished by an excellent mix of industrial and academic participation achieved, these papers present the latest methods of theoretical, experimental and computational rotordynamics, alongside the current issues of concern in the further development of rotating machines. Topics are aimed at propelling forward the standards of excellence in the design and operation of rotating machines. - Presents latest methods of theoretical, experimental and computational rotordynamics - Covers current issues of concern in the further development of rotating machines
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Inhalt
Keynote Addresses
Chapter 1: Modelling, dynamic behaviour and diagnostics of cracked rotors
ABSTRACT
1 INTRODUCTION
2 CRACK BREATHING MECHANISM
3 CRACK PROPAGATION AND SHAPE
4 IDENTIFICATION OF CRACKS IN ROTORS
5 CONCLUSIONS
Chapter 2: Model based signal processing in Smart rotating machines
ABSTRACT
1 INTRODUCTION
2 Detecting Traveling Wave Direction -Multiple Sensors
3 ORDER TRACKING WITH MULTIPLE SENSORS
4 ASYMMETRY AND DEFECT DETECTION IN ROTATING ELEMENTS
5 SUMMARY
Rotordynamics
Chapter 3: A full size rotor dynamic test rig for whole engine mechanics of aero engines
ABSTRACT
1 INTRODUCTION
2 ENGINEERING DESIGN OF THE SIMULATOR
3 SIMULATION TECHNIQUES
4 PROTOTYPE VALIDATION
5 Conclusion
Chapter 4: Dynamic analysis of a harmonically excited on-board rotor-bearing system
ABSTRACT
1 INTRODUCTION
2 ANALYTICAL MODELING OF AN ON-BOARD ROTOR-BEARING SYSTEM
3 NUMERICAL EXAMPLES AND DISCUSSION
4 CONCLUSIONS
Chapter 5: Vibration analysis of a shafting system for a marine diesel generator set including dynamic characteristics between shell and housing of generator bearing
ABSTRACT
1 INTRODUCTION
2 DESCRIPTION OF ROTOR SYSTEM FOR MARINE DIESEL GENERATOR SET
3 MODELLING FOR ROTORDYNAMIC ANALYSIS
4 COMPARISON OF EXPERIMENT RESULTS AND COMPUTATIONAL CALCULATION RESULTS
5 EFFECT OF GAP BETWEEN BEARING SHELL AND HOUSING
6 Conclusions
Chapter 6: An investigation into the dynamic response of a squeeze-film damped twin-shaft test rig
ABSTRACT
1 INTRODUCTION
2 TEST RIG
3 OVERVIEW OF COMPUTATIONAL METHODS
4 DISCUSSION OF RESULTS
5 CONCLUSIONS
Chapter 7: Identification of foundations in rotating machinery using modal parameters
ABSTRACT
2 INTRODUCTION
3 THEORY
4 NUMERICAL EXPERIMENTS
5 RESULTS AND DISCUSSION
6 SUMMARY OF CONCLUSIONS
Chapter 8: On the determination of bearing support pedestal conditions using shaker testing
ABSTRACT
INTRODUCTION
SHAKER TESTING PROCESS
EXAMPLE LP TURBINE SYSTEM WITH VINTAGE SHRUNK-ON DISC DESIGN
HOW TO ASSESS THE ACCEPTABILITY OF THE MEASURED FREQUENCIES
BEARING SUPPORT STIFFNESS EVALUATION
MEASUREMENT ERRORS
STATIC AND DYNAMIC BEARING PEDESTAL STIFFNESS DEFINITION
ROTOR DYNAMIC MODELS FOR RIGID SUPPORTS
ROTOR DYNAMIC MODELS WITH OIL-FILM AND BEARING SUPPORT CHARACTERISTICS
EXAMPLE ANOTHER VINTAGE DESIGN OF LP TURBINE SYSTEM
IDENTIFICATION OF RELATIVE STRENGTHS OF SIMILAR PEDESTAL STRUCTURES BY SHAKER TESTING
RESULTS AND DISCUSSIONS
CONCLUSIONS AND RECOMMENDATIONS
ACKNOWLEDGEMENTS
Chapter 9: Axial and radial dynamics of rotors on electrodynamic bearings
ABSTRACT
1 INTRODUCTION
2 RADIAL EDB MODELLING
3 AXIAL EDB MODELLING
4 UNIFIED MODELLING
5 CONCLUSIONS
Chapter 10: Model based design of a rotor supported by radial electrodynamic bearings
ABSTRACT
1 INTRODUCTION
2 TEST RIG DESIGN
3 EXPERIMENTAL VALIDATION
4 CONCLUSIONS
Cracks
Chapter 11: Acoustic emission for the detection of subsurface cracking in bearing condition monitoring
ABSTRACT
1 INTRODUCTION
2 EQUIPMENT AND TEST COMPONENTS
3 DATA ACQUISITION AND HANDLING
4 RESULTS
5 DISCUSSION
6 CONCLUSIONS
Chapter 12: Finite element vibration analysis of a rotating shaft system with an open crack by the harmonic excitation
ABSTRACT
1 INTRODUCTION
2 SHAFT WITH AN OPEN CRACK
3 FINITE ELEMENT MODEL OF THE SHAFT WITH AN OPEN CRACK
4 ANALYSIS OF FORCED VIBRATION BY HARMONIC EXCITATION
5 EXPERIMENTAL SYSTEM
6 COMPARISON WITH THE EXPERIMENT
7 CONCLUSION
8 ACKNOWLEDGEMENT
Chapter 13: On the effects of transverse annular cracks in rotating machines
ABSTRACT
1 INTRODUCTION
2 CASE STUDY
3 CRACK PERIODIC CLOSURE
4 VALIDATION OF THE THEORETICAL RESULTS
5 CONCLUSIONS
Blades
Chapter 14: 3D Blade root shape optimization
ABSTRACT
1 INTRODUCTION
2 BASE LINE BLADE MODEL
3 SHAPE VARIABLES
4 DESIGN OF EXPERIMENTS (DOE)
5 APPROXIMATION MODELS
6 OPTIMIZATION
7 CONCLUSION
8 ACKNOWLEDGEMENTS
Chapter 15: Analysis of LP steam turbine blade vibrations: experimental results and numerical simulations
ABSTRACT
1 INTRODUCTION
2 DESCRIPTION OF THE BLADE ROW
3 IN-FIELD RESULTS
4 NEW LAST STAGE BLADE DESIGN
5 MEASUREMENT RESULTS
6 CONCLUSIONS
7 ACKNOWLEDGEMENTS
Chapter 16: Semi-automatic mode naming methodology to classify impeller mode families
ABSTRACT
1 INTRODUCTION
2 METHODOLOGY
3 EXAMPLE OF APPLICATION
4 CONCLUSIONS
5 ACKNOWLEDGEMENTS
Chapter 17: A method for establishing the uncertainty levels for aero-engine blade tip amplitudes extracted from blade tip timing data
ABSTRACT
1 INTRODUCTION
2 BTT DATA PROCESSING
3 BTT UNCERTAINTY EXTRACTION METHOD
4 DISCUSSION
5 CONCLUSIONS
Chapter 18: Non-contact methods of sensing vibrations of turbine blades
ABSTRACT
1 THE CONCEPT OF THE BLADE VIBRATION MONITORING SYSTEM
2 NON-CONTACT SENSORS OF BLADE VIBRATIONS AND DISPLACEMENTS
3 MAGNETOELECTRIC SENSORS
4 CONCLUSIONS
5 ACKNOWLEDGEMENTS
Chapter 19: Estimation of turbomachinery blade vibrations from tip-timing data
ABSTRACT
1 INTRODUCTION TO TIP-TIMING MEASURING TECHNIQUE
2 MINIMUM VARIANCE SPECTRAL ESTIMATOR (MVSE), PRINCIPLE AND LIMITS
3 ADDITIONAL METHODS EXPLORED
4 IMPLEMENTATION OF ADDITIONAL METHODS ON A NUMERICAL EXAMPLE
5 REAL TEST CASE APPLICATION
6 CONCLUSIONS
Chapter 20: FSI-based forced response analyses of a mistuned high pressure compressor blisk
ABSTRACT
1 INTRODUCTION
2 THEORY
3 NUMERICAL STUDY
4 RESULTS
5 CONCLUSION
6 ACKNOWLEDGEMENTS
Chapter 21: The problem of complex shape tracking in a Campbell Diagram or how to overcome crossing/veering phenomena
ABSTRACT
1 INTRODUCTION
2 BACKGROUND EQUATIONS
3 A NEW CRITERION FOR ROTOR MODE SHAPE TRACKING
4 INDUSTRIAL APPLICATION
5 OVERCOMING VEERING/CROSSING PHENOMENA
6 CONCLUSION
Chapter 22: On the comparison of possibilistic and probabilistic methods for the determination of the worst-case response of mistuned bladed disks
ABSTRACT
1 INTRODUCTION
2 METHODOLOGY
3 NUMERICAL EXAMPLE…