Basic Machinery Vibration


Code Date Venue Fees Registration
M/42 11 - 15 Nov Cairo 1600 USD Register Now

Course Objectives

Machinery distress very often manifests itself in vibration or a change in vibration pattern. Vibration analysis is therefore a powerful diagnostic tool, and troubleshooting of major process machinery would be unthinkable without modern vibration analysis.

Course Modules

Module 1: Vibration Fundamentals

  • Free response of single degree of freedom linear system
  • Free vibration of damped second order system
  • Forced response of single degree of freedom linear system
  • Response of first order systems to harmonic excitation, frequency response
  • Response of second order systems to harmonic excitation
  • Rotary unbalanced masses
  • Whirling of rotating shafts
  • Harmonic motion of the support

Module 2: Vibration and Sound Measuring Interments and Calibration

  • Vibration pickups (velocity, accelerometer and non contact)
  • Vibration meter
  • Vibration analyzer
  • Selection of vibration pickup
  • Practical problems of transducer installation
  • Amplitude calibration
  • Accelerometers, shock and force calibration
  • Sensor practice
  • Mass spring seismic sensors (open loop and closed loop)
  • The peizo-electric sensors
  • Continuous monitoring and diagnostics

Module 3: Data Acquisition and Interpretation

  • Vibration amplitude versus frequency analysis
  • Plotting amplitude versus frequency (x-y) signature
  • Linear versus logarithmic (db) display
  • Amplitude/phase versus machine rpm
  • Stroboscopic observations
  • Amplitude versus phase (Nyquist plots)
  • The waveform analysis
  • Examples of time waveform analysis

Module 4: Phase Analysis

  • Measurements techniques (stroboscopic light-phase meter and oscilloscope)
  • Some practical considerations for phase measurements.

Module 5: Data acquisition

  • Unbalance
  • Insufficient shrink fit
  • Misalignment
  • Torque lock
  • Bearing misalignment
  • Eccentricity
  • Looseness
  • Defective antifriction bearing
  • Defect belts
  • Oil whirl
  • Dry whirl
  • Resonance

Module 6: Vibration Problems with Specific Machinery - Centrifugal pump

  • Hydraulic forces, cavitation and recirculation
  • Fans and blowers
  • Aerodynamic forces and flow turbulence
  • Gear drives
  • Electrical problems
  • Rotor and stator related problems

Module 7: Turbo machinery Problems

  • Internal friction whirl, aerodynamic cross coupling, surging and   choking (stone walling)
  • Shaft crack detection
  • Vibration of reciprocating machines

Module 8: Problem Correction by Vibration Analysis

  • Unbalance
  • Single-phase vector method of balancing Sample problems
  • Dynamic unbalance
  • Two phase balancing
  • Misalignment
  • Resonance
  • Isolation

Target Audience

This course is valuable for junior engineers, junior operation engineers, maintenance engineers and Technicians.

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