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
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 About Us
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