NEi Rotor Dynamics

CAD File Import

• Define geometry (points and lines) from practically any 2D CAD cross section, and even programs like Visio

2D Axisymmetric Harmonic Finite Elements

• Provides a near exact representation of rotor/structure geometry
• Includes radial, axial, and tangential motion for nearly 3D resolution
  

Bladed Elements

• Represent airfoils, holes, balance rings, etc.
• Thickness can be specified using a 2D table or on individual nodes
  

XML Import/Export

• Materials, lubricants, and even complete models can be imported and exported with XML files
  

Mesh Generation

• Create nodes and elements from points and lines, specifying divisions and biases
• Automatic meshing is available
  

Profile Optimization

• Any node numbering scheme acceptable as internal numbers automatically reordered at run time to reduce analysis profile
  

Unlimited Problem Size

• All memory is dynamically allocated so there is no practical limit to how big a model can be
  

Graphical Selection

• Choosing nodes and elements for application of supports or loads can be done by selection on geometry model
  

Comprehensive Output

• All graphical displays and listings can be saved or printed
• Even animated deflections can be written to AVI files

Unit Systems

• 3 unit systems are supported explicitly - English, SI-meters and SI-millimeters
• All input and output quantities that have units are clearly specified and can be switched between the various systems as desired
• No more consistent unit ambiguity!
  

Complete Rotor Dynamics

• Damped natural frequencies
• Steady (speed-dependent) response
• Transient (time-dependent) response
  

Linear Heat Transfer

• Conduction
• Convection
• Heat generation
• Specified nodal temperatures
• Steady or transient (linked directly to rotor dynamics)

Elastostatic Stresses

• Body forces (rotation, maneuver, and thermal)
• Modal and forced response (steady and transient)

Element and Nodal Loads

• Eccentricity (unbalance, in terms of radial and angular offset)
• Radial, axial, and tangential nodal forces (frequency & speed dependent)

Embedded Bearing Mechanics

• Rolling elements (ball and cylindrical roller), including friction and heat generation
• Journal (plain and arbitrary geometry), squeeze film, tilt pad, and hydrostatic fluid films with no assumed loads

Linear and Nonlinear Supports

• Speed-dependent linear (stiffness, damping, and mass coefficients)
• Piecewise nonlinear (force-displacement in radial & axial directions)
• Frequency response functions
• Constraints

Output Sets

• Used to organize different runs with a common model into logical output groups, such as different speed/time increments, parameter variations, or loading changes
• View the results separately or combined
  

Edit Functions

• Copy, paste, undo, and redo, including modeling operations

Expert System

• Provides input validation
• Checks for model completeness
• Provides graphical interface for building and running a model
• Reviews final results

Help System

• General
• Context specific