Vibration Troubleshooting, Analysis and Repair

Performing vibration troubleshooting, testing and analysis services, and subsequent design modifications on equipment – ensuring structural integrity, minimizing risk and controlling costs for owners/users.

Most vibration problems on equipment are due to thermal, mechanical, acoustic, or flow related excitation – and if left unchecked, will cause equipment failure, which may lead to greater repair costs. Components vibrate at particular natural frequencies. These frequencies and resulting mode shapes can be modal and vibration analysis. Often, simple analysis can be performed, while for more complex systems, finite element analysis is performed to determine the dynamic response.

Once we identify vibration and fatigue issues, we recommend solutions to ensure structural integrity.

  • Troubleshooting, analysis and repair of rotating equipment including compressors, fans, shafts, and piping
  • Vibration/ seismic & fatigue analysis of tanks, vessels, skids and welded structures
  • Vibration and shock analysis of nuclear equipment in land-based and shipboard applications

Above –  Vibration and Modal Analysis of an Industrial Impeller

  • Recent Projects

  • Low Cycle / High Cycle Fatigue Analysis

    A vibrating component or system often leads to fatigue – which eventually leads to equipment malfunction, or catastrophic failure. Fatigue cracks usually initiate at the surface, and for this reason, the condition of the surface and the environment are important factors influencing fatigue behavior.

    Tom O’Donnell performs vibration, fatigue and failure analysis to ASME and other relevant Codes. Bill O’Donnell Sr. currently serves as the Chairman of the Subgroup of Fatigue Strength of the ASME Boiler and Pressure Vessel Code.

    We perform fatigue analysis of non-welded and welded components. Fatigue analysis is performed per ASME Section III Class 1 and Section VIII Division 2. The fatigue design life evaluation procedures in Section III of the ASME Boiler and Pressure Vessel Code were originally developed in the U.S. Naval Nuclear Program. Those involved were Bill O’Donnell, (Bernie) Langer, W.E. (Bill) Cooper and James (Jim) Farr – who, in the late 1950’s and early 1960’s developed the initial formulation of this technology in the Tentative Structural Design Basis for Reactor Pressure Vessels and Directly Associated Components, which became known as “SDB-63.”

    Section III of the ASME Code “Vessels in Nuclear Service” was the first to include specific Code rules to prevent low cycle fatigue failure. Its first edition was published in 1963; Section VIII, Division 2, “Alternate Rules for Pressure Vessels” followed in 1968.

    Examples Include:

    • Compressors
    • Welded Assemblies
    • Supports
    • Lifting Devices
    • Petrochemical
    • Manufacturing
    • Aerospace
    • Power Generation
    • Military
    • Pumps & Valves
    • Rotors & Shafts
    • Medical Equipment
    • Electronic Equipment

    We perform vibration analysis – as well as fatigue & failure analysis on components for clients in industries including energy, manufacturing and (onshore/ offshore) oil & gas.
    Our analysis includes:

    • Response Spectrum
    • Dynamic Design Analysis Method (DDAM)
    • MIL-STD-901D
    • MIL-STD-167

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    Vibration Analysis Related Links

    >> Tom O’Donnell, PE
    >> Finite Element Analysis
    >> Engineering Troubleshooting
    >> Failure Analysis Services
    >> Portfolio of Projects
    >> Our Engineering Team
    >> Blog – Failure Analysis
    >> Links of Engineering Resources

    Learn from the experience of others. Especially when one such “other” is Dr. William O’Donnell, PhD, PE, Founder and President of O’Donnell Consulting Engineers, Inc., and ASME “Engineer of the Year” – his 50 years of experience in analysis of components including fatigue and fracture safety evaluations and failure analyses are now comprised in this volume.

    If you are interested learning more in Engineering Design, Manufacturing and Construction, as well as Failure Analysis, then this book is a must have!


    * Does not include shipping, handling or tax

    Handbook of Lessons Learned

    (412) 835-5007

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