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The base version of
download on a time-limited
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
- 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:
- Heat generation
- Specified nodal temperatures
- Steady or transient (linked directly to rotor
- 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
- 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
- Piecewise non-linear (force-displacement in radial &
- Frequency response functions
- 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
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?