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Rotordynamic Analysis

Waukesha Bearings utilizes comprehensive rotordynamic analysis to validate original builds for OEMs and to diagnose problems and propose the right solutions for end users.

Bearing and Seal Expertise

Along with the rotor, the bearings and seals are the most influential components in rotating equipment vibrations. Therefore, the accuracy of a rotordynamic analysis relies on the analyses of the bearing and seal characteristics. As a global leader in the engineering and manufacturing of bearings and seals, Waukesha Bearings has the most reliable and accurate tools to perform those analyses.

Sample Rotor Model

Accurate, Comprehensive Reports

Upon receipt of the relevant rotor and coupling information, our engineers build a rotor model and analyze the bearings and seals using proprietary codes. The customer receives a comprehensive report of the findings to include the following, based on the type and scope of analysis performed.

Lateral Rotordynamic Analysis

Sample Lateral Rotordynamic Analysis

  • Undamped critical speed (UCS) analysis
  • Damped critical speed analysis
  • Eigenvalue analysis (mode shapes)
  • Unbalance response analysis
  • Stability analysis (level I and II)
  • Bearing and seal optimization
  • ISFD optimization, if needed
  • Brush seal contact–induced stability and unbalance analysis, if needed

Torsional Rotordynamic Analysis

Sample Torsional Rotordynamic Analysis

  • Torsional natural frequencies (TNF)
  • Eigenvalue analysis (mode shapes)
  • Damped torque or stress response analysis, if needed
  • Transient analysis for start-up or short circuit analysis for motor or generator trains
  • Transient torsional stress analysis on critical points (e.g., coupling, rotor)

Both Waukesha Bearings and Bearings Plus, a Waukesha Bearings business, can provide rotordynamic analysis services to customers.  


The Waukesha Advantage

  • The most comprehensive analytical capabilities in the industry
  • Wide and deep knowledge of bearings and seals
  • Accurate in-house tools for bearing and seal analysis
  • Accurate rotordynamic analysis and predictions
  • Proven engineered solutions
  • The right solutions, available at the right time
  • Fast turnaround times based on skilled expertise
  • Continuous research and development of new technologies


  • Compressors
  • Steam and gas turbines
  • Expanders (radial turbines)
  • Turbochargers
  • Microturbines
  • Motors
  • Generators
  • Pumps
  • Gearboxes
  • Propulsion shafts
  • Blowers
  • Fans