Dynamics R4

See also Damper R3.1 here
Broshure Dynamics R4[pdf]ENG


General Properties

  • Large variety of standard linear and non-linear elements for modeling of complex rotor configurations
  • High speed of computations
  • Automatic time stepping strategy of numerical integration
  • Multiple ways of results visualizations
  • Opportunity for users to create new nonlinear elements on the basis of user's algorithms and math models and integrate them into DYNAMICS R4 analyses schemes
  • Opportunity to create one's own material database
  • User-defined forms of protocols and reports on the basis of model data and computed results
  • Developed system of information, including help functions and error reports
  • More than 30 examples of models and solutions from different publications - papers, manuals, and textbooks.
  • Import of models from DYNAMICS R3.1 program system
  • Multi-language interface

Functional Capacity

  • Modeling of multi-shaft rotor structures
  • Unlimited number of shafts and cases
  • Spatial location of subsystems (free orientation of spin axes) - coaxial, nonaligned and crossing
  • Joint lateral, axial and torsional vibrations of multi-shaft rotor structures
  • Anisotropic elements
  • Real rotation speeds of rotors in multi-shaft rotor system, including opposite ones
  • Parametric analysis - different user-defined laws of variation of model inertia, stiffness, damping, loads and etc.
  • Different stationary and non-stationary loads - unbalances, harmonic loads, periodical loads, impulse loads, arbitrary loads, etc
  • Aerodynamical loads
  • Computation of rotor system with weight and static loads
  • Opportunity to compute multi-shaft systems with different gearing connections
  • Modeling of dynamical system parts by super elements generated by component mode synthesis in FEM programs (NASTRAN, ABACUS, ANSYS, etc)
  • Modelling of multi-shaft systems with any kind of gears(helical, bevel, etc.)

General Problems of Linear Dynamics

  • Natural frequencies and mode shapes for lateral, axial and torsional vibrations of non-rotating and undamped multi-shaft rotor system
  • Damped natural frequencies and mode shapes of joint lateral, axial and torsional vibrations of rotating rotor system
  • Critical speeds
  • Natural frequencies maps
  • Critical speeds maps
  • Kinetic and potential energy distribution through a rotor model elements for any mode shape
  • Stability map, rotor instability thresholds
  • Unbalance response
  • Static deflection due to weight and arbitrary loads

General Problems of Non-linear Dynamics

  • Computation of rotor system with clearances, full and partial rubbing, external and internal friction, definition of instability thresholds, etc
  • Computation of rotor system with journal bearings of different kinds
  • Computation of rotor system with non-linear squeeze-film dampers of different kinds
  • Computation of rotor system with non-linear rolling bearings

User interface

  • 2D and 3D visualization of rotor models
  • Exchangeable groups of modeling elements or data for alternative calculations within the one dynamical model
  • Continuous animation
  • Different ways of results visualization - time behavior plots, motion orbit plots after transient analysis, frequency response curves, FFT spectra, waterfall (cascade) plots, mean-square plots, peak-to-peak plots, amplitude envelopes and etc.
  • Different output parameters - displacements, phases, velocities, accelerations, forces, moments
  • Different output data protocols
  • 2D and 3D output results graphics

Dynamics R4 Main window T53 engine modeling modeling window Dynamics R4 GTE critical speeds, modeshapes GTE critical speeds T53 unbalance response Rotor LP Rotating speed law Transient Response, 3D Orbit Engine waterfall diagram Script nonlinear support Transient Response, 2D Orbit Unbalance response, 3D plot Modeshape table view Dynamics R4 Calculation report

To see big picture click on image

Find out more


DYNAMICS R4.x is a new generation of software package for turbomachinery rotor dynamics problems. Details...
Media Library
DAMPER R3.1 is a simple tool for computing of the characteristics of hydrodynamic damper supports.Details...


  • Technical consulting in rotor dynamics
  • Design of rotor-bearing structures
  • Dynamical analysis of rotor-bearing structures
  • Design of the non-standard and unique experimental equipment for rotor-bearing structures
  • Development of vibration diagnostic and condition monitoring systems for gas turbine engines
  • Special software in rotor dynamics of turbomachinery - programming and development
  • Engineers training in rotor dynamics
  • Students training in rotor dynamics
  • Training in rotor dynamics field


  • Rotor Dynamics
  • Rotordynamics of Gas Turbine Engines
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