Detailed Torsional and Lateral Rotordynamics Analysis 

MSI performs detailed torsional and lateral rotordynamics analyses using finite element analysis as well as established rotordynamics programs to determine torsional natural frequencies and lateral critical speeds of rotating equipment such as pumps, compressors, fans, turbines, and other turbomachines.


MSI often uses International Standards Organization (ISO), American Petroleum Institute (API), and Hydraulic Institute standards as guidelines for performing the torsional and lateral rotordynamics analyses and related field testing.


Rotordynamic Analysis Benefits


MSI uses Rotordynamic Analysis and FEA to troubleshoot, evaluate and understand the behaviors pertinent to a rotational machine problem.

Services_Field Testing and Troubleshooting and Services_Product Development

MSI uses field test data used to calibrate Rotordynamic and FEA models and analyses to real world conditions to validate predictions.

Learn More About FEA

Once behaviors are understood and validated, potential remedies are simulated. This saves time and money by avoiding trial and error fixes with right-first-time fixes.

Learn More
recip torsional


Why We Need to Know Rotordynamics

If torsional natural frequencies or lateral critical speeds of the rotating components align themselves with potential excitation sources generated by the operation of the equipment, and if little damping is present, severe rubbing or shaft failure can occur. 

In addition to predicting the natural frequencies and critical speeds of the rotating shafting, stress and deflections can be computed via forced response analyses to assess whether the stresses and/or deflections resulting from the excitations can be safely tolerated by the equipment or if severe damage or fatigue failure will occur. 

In such cases, design changes will be recommended to shift natural frequencies and/or critical speeds away from the potential excitation frequencies with sufficient separation margin to avoid resonance during operation. 


MSI In Action

Case Study

Multi-Rotor Gas Turbine Rotordynamic Analysis

MSI has conducted sophisticated analysis of rotordynamic response on the casing and structural supports of multi-rotor systems utilizing the latest technology available in Finite Element Analysis (FEA) and rotordynamics.

Case Study

Solids Handling Pump Repetitive Failure of Bearing and Seal

An engineering construction firm needed help in determining the root cause for the repetitive pump bearing and seal failures of a solids handling pump and to provide a solution to eliminate the issue. 

Case Study

Design Assessment Mitigates Risk

A design assessment was carried out in an effort to prevent potential premature bladed disk and impeller fatigue failures of three newly installed critical compressor trains.

Talk to an MSI Engineer to discuss your Rotordynamics problem

Contact Us