FEMRDYN is a modern
finite element rotor dynamics analysis program based on the 1985 conical beam
theory of Greenhill, Bickford, and Nelson. Some of the key features in this program are:
6
Degrees-of-Freedom analysis (axial, torsional, and lateral)
Linear
and non-linear supports, including squeeze films and magnetic bearings
Damped
natural frequency and forced response calculations (steady and
transient)
Platform independent graphical interface with a complete set of plots
and listings
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Specific
capabilities in FEMRDYN are:
Rapid model generation
Graphical interface or import free-form data file
Displays linked to data tables
All
data and results have specific units - English, SI-meters,
SI-millimeters
Conical beam elements with unlimited problem size
Nodes
independent of segment geometry

Shaft
elements and subelements automatically created from node locations and segment geometry
Separate
mass and stiffness representations (mass geometry different from
stiffness)
Multiple shaft capabilities
Represent multiple rotor systems or interaction with structure
No
limit on number of shafts or layers
Shafts
labeled with user-defined titles (see mode shape above)
Linear and non-linear supports
Standard speed dependent linear connections
Non-linear force-displacement for tip rubs and deadband
Squeeze films (long and short)
All
supports identified with user specified labels
Integral,
state-of-the-art magnetic bearing model
Includes frequency dependent sensors, controllers,
amplifiers, and actuators

Both
heteropolar and homopolar actuator models
Modal
and forced response results
Damped
natural frequencies including modal strain energy
Unbalance, frequency, maneuver, and time-dependent loads
Complete set of graphical displays and text listings
Geometry and schematic diagrams
Rotor properties including mass, flexural rigidity,
unbalance distribution
Whirl
maps, stability maps, and mode shapes
Nodal
displacements, support loads, internal loads, system response shapes
Time histories and orbits
General and context-sensitive help system
Most
graphical displays provide options for user customization

To purchase FEMRDYN, or obtain a trial version, please
contact usTo download additional information on
FEMRDYN,
click here
To download the paper describing the methodology used in FEMRDYN, go to
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Us