iSTRDYN Features:

iSTRDYN is a revolutionary computer code for the design and analysis of rotor-bearing systems.  Key features of the program can be listed as follows:

• 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, and 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 non-linear supports:
  • Speed-dependent linear (stiffness, damping, and mass coefficients)
  • Piecewise non-linear (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, and will ultimately review results.
   
• Help system - both general and context specific

For illustrations of these features, please go to the examples page.  However, the true capabilities of iSTRDYN are best experienced first hand.  Why not download a trial version and see for yourself how it will dramatically improve the design and analysis of your rotating machinery?