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الموازنة متعددة المتسويات للمكائن الدوارة بواسطة قياس الاستجابة الاهتزازية == Multi-Plane Balancing of Rotating Machines Using Vibration Response Measurement
Author name:
يحيى محمد امين
Supervisor name:
Jaafar K. Ali
General topic:
Mechanical Engineering
Specific topic:
Mechanical Engineering
Degree:
Doctorate
University:
University Of Basrah - College Of Engineering - Department Of Mechanical Engineering
Language:
English
Key words:
- Chapter One: Introduction
- Introduction
- Advantages of Balancing
- Rotor Vibration Forms
- Causes of Unbalance
- Types of Unbalance
- Rotor Balancing Methods
- Mathematical Model
- Model Based Balancing (MBB)
- Experimental Modal Analysis (EMA)
- Digital Signal Processing (DSP)
- Time and Frequency Domain
- Fast Fourier Transform (FFT)
- Thesis objectives
- Thesis structure
- Chapter Two: Literature Review
- Introduction
- Influence Coefficient Method
- Modal Balancing Methods
- Balancing Without Trial Runs
- Conclusions
- Chapter Three: Finite Element Model
- Introduction
- Coordinate System
- Rotor Components
- Disk elements
- Shaft elements
- Euler-Bernoulli Beam Theory
- Shear and rotary inertia effects
- The 8-DOF Shaft Elements model
- Gyroscopic effects
- Couplings
- Bearings
- Rolling-Element Bearings Hydrodynamic Bearings
- Flexible Support
- Modeling a Whole Rotor
- Chapter Four: Modal Analysis
- Introduction
- Updating of FE model
- Modal Testing Method
- Mathematical Models
- Theoretical Basis of Modal Analysis
- Single Degree of Freedom System SDOF
- Graphical Representation of FRF
- Multi-Degree-of-Freedom System (MDOF)
- Revisiting SDOF
- Frequency Response Function Measurement
- FRF Estimation
- SISO-FRF Estimation
- Coherence function
- Excitation Techniques
- Extracting Modal Parameters
- One Column or One Row
- Extracting Modal Parameters from FRF Data-SDOF
- methods
- Peak-picking
- Circle-fit
- Least Squares Curve Fitting Using SDOF Model
- Extracting Modal Data from FRF Data-MDOF method
- Mode Shape Extraction from Modal Constants
- Modal Testing of Rotating Structures
- Chapter Five: Digital Signal Processing
- Introduction
- Time and Frequency Domains
- Signal Digitization
- Sampling
- Quantization
- Aliasing
- Leakage
- Windowing
- Averaging
- Chapter summery
- Chapter Six: Sensors calibration and EMA verification
- Introduction
- Calibration of transducers
- Calibration of Accelerometer
- Calibration of Force Transducer Case study-I: Circular cross-sectional shaft
- Analytical Modal Analysis
- Numerical Modal Analysis
- Experimental Modal Analysis
- Available Excitation Techniques
- Results and Comparison
- Effects of DSP parameters on FRF
- Effect of Windows
- Effect of sample time
- Effect of Excitation Techniques
- Reciprocity condition
- Case study-II: Shaft with two disks
- Chapter summary
- Chapter Seven: Model-Based Rotor Balancing
- Introduction
- Model Based Balancing (MBB)
- Balancing Test Rig
- The rotor to be balanced
- Performing EMA on the rotor
- FEA Based Model
- Comparison of the Resulting Modal Parameters
- Balancing Case Studies
- Case-I: Two measuring planes and two balancing planes
- Case-II: Two measuring planes and three balancing planes Residue-Based Model Balancing
- Essential arrangements before EMA
- Some issues when performing EMA
- EMA results
- Balancing Results
- Discussion of results
- Discussion of Results of Tables (7-4) and (7-5)
- Discussion of Results of Tables (7-6)
- Chapter summery
First pages:
T105748 - p.pdf
