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Operational modal analysis for engineering dynamic problems.


This two day course will introduce the delegates to Operational Modal Analysis, especially to systems with harmonic components, such as rotating machinery. This will be achieved by combining theory and laboratory exercises. Numerous case studies from the Marine and Energy business will be presented.

Course content

Day 1
Differences and similarities between operational modal analysis and experimental modal analysis
Introduction to frequency domain decomposition (FDD) techniques
Introduction to stochastic subspace identification (SSI) techniques
How to apply the co-variance driven SSI technique to industrial problems
Experiments: comparing FDD, SSI and EMA


Day 2
Influences of harmonic components
Experimental and operational modal analysis of rotating machinery
Experiments: influence of harmonic components, rotating machinery
Complex and non-linear systems

Case studies

  • Panel cracking

  • Resonance of the accommodation block

Tall structures
  • Power station chimney – long term monitoring and verification of damper performance

  • Large ship unloader

  • Natural frequency of cable stays

  • Variation of natural frequency of deck with temperature

  • Diesel engines – on a ship

  • Generators – offshore platform

  • Nuclear power generator

  • FE model updating

  • Dynamic absorber application

  • Bow thruster

Suitable for

Rotating Equipment Engineers, Noise and Vibration Engineers, Project Managers and anyone who would like to learn about Operational Modal Analysis.

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