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Trade press article — Plant Engineering

The Shape of What’s Shaking

Identify and visualize natural frequencies that cause resonance

  • May 2022
  • Number of views: 4825
  • Article rating:

Gene Vogel
EASA Pump & Vibration Specialist

When machinery vibration becomes severe, resonance is often at work. Methods of testing machines for natural frequencies that cause resonance have been discussed in prior presentations. This presentation will first focus on identifying resonance and then move to methods that help visualize the vibratory motion, helping to identify solutions. Two methods will be discussed- traditional Operating Deflection Shape (ODS) analysis and video motion magnification.

Learning objectives:

  • Review of testing methods
  • How to visualize vibratory motion
  • Operating deflection shape analysis
  • Understanding video motion magnification

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Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 13: Motor Alignment, Vibration & Noise

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 13: Motor Alignment, Vibration & Noise

Mechanical Repair Fundamentals of Electric Motors
  • Section 12: Vibration & Motor Geometry

Tags: Vibration
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