NEi Software Nastran Finite Element Analysis

Nastran Finite Element Analysis and Simulation Software

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NEi Rotor Dynamics

NEi Rotor Dynamics by DynaTech SoftwareNEi Rotor Dynamics (iSTRDYN©) by DynaTech Software is a comprehensive finite element computer code for the mechanical design and analysis of rotor-bearing systems. It is a unique combination of statics, dynamics, and heat transfer specifically targeted for rotating machinery.


Solution Types

  • Statics
  • Dynamics
  • Heat transfer


checkCAD File Import

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

check2D Axisymmetric Harmonic Finite Elements

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

checkBladed Elements

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

checkXML Import/Export

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

checkMesh Generation

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

checkProfile Optimization

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

checkUnlimited Problem Size

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

checkGraphical Selection

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

checkComprehensive Output

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

checkUnit 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!

checkComplete Rotor Dynamics

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

checkLinear Heat Transfer

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

checkElastostatic Stresses

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

checkElement and Nodal Loads

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

checkEmbedded 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

checkLinear and Nonlinear Supports

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

checkOutput 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

checkEdit Functions

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

checkExpert System

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

checkHelp System

  • General
  • Context specific
Phone (U.S.): (877) - Nastran
Phone (International): +1 (714) 899-1220
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