Topics Covered
Introduction
Single-degree-of-freedom systems (SDOF)
- Free Vibration: Natural frequencies and critical damping
- Forced Vibration: Harmonic, transient, and impulse forces
- Base excitations: response spectra
- Dynamic amplification factors
- Resonance
- Equivalent Static Load
- Torsional vibration
- How to reduce vibration levels in SDOF
Shock spectrum
- How to develop shock spectra from force time histories
- How to use shock spectra to compute dynamic response to shock loads
Multiple-degrees-of-freedom systems (MDOF)
- Natural frequencies and mode shapes
- Direct Time-history response analysis
- Modal Time-history response analysis
- Shock spectrum method of response analysis
- Comparison of Methods: Relative advantages, accuracy and suitability
- How to reduce vibration levels in MDOF
Earthquakes and Other Base Excitations
- Load specification
- Time-History Analysis
- Response Spectrum Analysis
- Design Aspects
Finite Element Analysis (FEA)
- Basic concepts, assumptions and limitations
- Guidelines to FE modeling (keys to successful analysis)
- Example FE models and results
Modal testing of equipment and structures
- Definitions
- Practical aspects
Test-Analysis Correlation
- Sources of errors in test results
- Sources of errors in analysis
- Test-analysis correlation of natural frequencies
- Fine-tuning analysis models using test-analysis correlations
Torsional vibrations (shafts, disks, and rotors)
Vibration Absorbers (Tuned-Mass Dampers)
- Basic Concepts
- Analysis and design
- Where used?
- Advantages and disadvantages
Vibration Isolation
- Basic Concepts
- Design
- Where used?
- Advantages and disadvantages
Transportation of Sensitive Equipment
- Forces during transportation (oscillatory, shock and drop forces)
- Qualification by analysis
Vibration of Rotating Equipment
- Forces acting on rotating equipment
- Response computation
- Design to meet manufacturer or operator specifications
Foundations for Rotating Equipment
- Harmonic forces due to operation of rotating machines
- Modeling foundation stiffness and damping
- Design to avoid resonance and/or large displacements
Flow-Induced Vibrations
- Vibration mechanisms
- Design against vortex shedding
- Vortex suppressors
Machinery Vibration Monitoring and Problem Diagnosis
- Periodic and continuous vibration monitoring
- Methods and equipment
- “Symptoms” and diagnosis
Worked-out Numerical Examples
- 32, detailed, step-by-step, worked-out examples of analysis and design are presented in the various chapters
Case Histories
- Five case histories are presented to demonstrate how the various concepts and methods presented in the course are applied in complex vibration projects