ROTOR DYNAMICS OF TURBOMACHINERY

OUTLINE OF DYNAMICS 4

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

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• MAIN MODELING ELEMENTS
  • Elements to Determine Subsystem Parameters
  • Linear Elements for Modeling Subsystems
  • Linear Links for Connection of Subsystems
  • Loads
  • Nonlinear Links for Connection of Subsystems
  • Other Elements and Functions
• DESCRIPTION OF LINEAR AND NON-LINEAR MODELING ELEMENTS
  • Linear Elements
  • Non-linear Elements
• PURCHASING OPTIONS