Case Study: Resonance Identification and Correction

Ninoslav Zuber , CEO, ProActive Solutions


The importance of resonance identification and elimination. A brief reminder on system dynamics (mass, stiffness, damping).  Forced natural frequencies. How to identify the presence of excited natural frequencies – bump test, run up and coast down analysis, operational deflection shapes (ODS), experimental modal analysis. Case study #1: vertical hydraulic turbine. Case study #2: three stage piston compressor. Both case studies presented in detail: vibration measurements during stationary regime, results of special test for resonance identification (run up test, operational deflection shapes, experimental modal analysis), resonance correction method implementation, measurement results after resonance correction.


1. The importance of resonance identification.
2. Tips for resonance identification.
3. Tips for resonance correction.


Ninoslav Zuber, born 1973 in Serbia, has a PhD degree in Mechanical Engineering from University of Novi Sad. Certified Mobius vibration CAT III analyst and instructor with 20 years of experience in vibration expertise. Author of many scientific and research papers and University textbooks. Active member of: -Mobius Institute Board of Certification (MIBoC) Technical Committee -Institute for standardization of Serbia M108 (Mechanical Vibrations and Shock)