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Vibration: Theory, Measurements, and Applications

(Level: Introductory, 1 Day, $195)

This is an introductory course designed for those new to vibration testing, occasional practicioners, and managers. The attendees are first given the essential foundation in the physics of vibration. Only simple mathematics are used. Instrumentation and proper measurement practices are then explained. The theory and practical knowledge are combined during the presentation of particular applications; Machine Vibration, Modal Analysis, and Shaker Testing.

1) Theory

  • Simple Oscillatory Motion
    • Amplitude
    • Frequency
    • Phase
  • Amplitude
    • Pk, Pk-Pk, RMS, Crest Factor
    • Acceleration, Velocity, Displacement
    • Common Units
    • dB
  • Frequency
    • Fourier Series and Transform
    • The Spectrum
  • Mechanism of Vibration
    • Wave Propogation
    • Modes and Resonance
    • Single and Multi Degree of Freedom Systems
    • Mass, Springs, and Dampers

2) Measurements

  • Sensors
    • Common Sensors
      • Proximity Probes
      • Velocity Sensors
      • Lasers
    • Piezoelectric Accelerometers
      • Operating Principle
      • Charge vs. Voltage
      • Internal vs. External Conditioning
      • Important Specifications
      • Mounting
      • Calibration
      • Examples
  • Read-outs and Analyzers
    • Overall
    • Transmitters
    • Alarms
    • Filters
    • FFT Analyzers
    • Fractional Octave Analyzers

3) Application: Modal Analysis

  • ODS vs. Modal
  • Purpose and Usage
    • Trouble Shooting
    • Structural Dynamics Modifications
    • FEA Model Correlation
  • Resonance
  • Damping
  • Mode Shapes
  • SDOF and MDOF
  • Frequency Response Function
  • Steps to Complete Test
  • Excitation Techniques
  • Parameter Estimation (Curve Fitting)

4) Application: Shaker Testing

  • Types of Shakers
    • Hydraulic
    • Piezoelectric
    • Mechanical
  • Electrodynamic Shakers
    • Operating Principle
    • Limitations
      • Force
      • Velocity
      • Displacement
    • Selection
    • Support Systems
  • Controllers
    • Sine
    • Random
    • Shock
    • Mixed Mode

5) Application: Machine Vibration

  • Maintenance Strategies
  • Predictive Methods
    • Overall
    • Severity Charts
    • Trending
  • Fault Diagnosis
    • Imbalance
    • Misalignment
    • Bearings