Dynamic calculations

Shaft dynamic calculation : lateral and torsional analysis.

This kind of studies allow to calculate shaft or shaft line critical speeds and also unbalance response and torsional effects. Shaft Dynamic calculation allows to simulate effects of shaft modification.

When?

  • During design phase of a machine.
  • Machine retrofitting.
  • Shaft critical speed problem.
  • Shaft line modification (change of coupling, bearing…)

Why?

  • Design validation, pre-study stage.
  • Validation of shaft line geometrical modification.
  • Check and forecast of shaft Pk-Pk displacement levels.
  • Check bearing stability (clearance, oil…).
  • API compliance.

Services

Our engineering service realize shaft lateral and torsional analysis studies.

  • Create calculation model base on provided drawings.
  • Calculation of bearing characteristics (stiffness and damping).
  • Critical speed calculation, Campbell diagram.
  • Unbalance response calculation.
  • Calculation of torsional effects (instant torque variation, torque pulsation).
  • Check of API compliance.
  • Simulation of change in shaft or bearing geometry.

Which machines?

  • Steam and gas Turbine.
  • Centrifugal compressor.
  • Electrical motors and generators.
  • Fans.
  • Pumps.
  • Reciprocating compressor.
  • All rotating machinery.
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