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iSTRDYN is a state-of-the-art rotating machinery mechanical design and analysis program based on two dimensional finite element theory. Some of the key features in this program are: 2D axisymmetric, harmonic finite elements with combined radial, axial, and tangential motion Direct import of CAD files for model building Standard support representations along with embedded rolling element and fluid film bearing mechanics Combined steady and transient rotor dynamics, heat transfer, and stress analysis Intuitive, integrated graphical interface with desktop, network, and Internet versions
Specific capabilities in iSTRDYN are: Easy creation of geometrically accurate models Models closely represent actual rotor cross-sections Mesh defined from points & lines (from CAD file if available) or directly by specifying nodes & elements Input and output have specific units - English, SI-meters, SI-millimeters Advanced 2D axisymmetric harmonic elements with unlimited problem size Axial and radial motion inherently coupled - true disk flexibility effects Great for thin, tapered structures and overhung/cantilevered features Solutions for zeroth and first order harmonics automatically calculated and combined Includes plain stress elements to directly represent bladed sections Rotor dynamics with heat transfer and stress Nodal temperatures solved before dynamics - accurate material properties for modes & forced response Heat transfer boundary conditions can be speed & time dependent Damped natural frequencies including modal strain & kinetic energy Forced response includes unbalance, asynchronous, maneuver, and time-dependent loads Nodal stresses available from all forced response solutions Linear and non-linear supports Standard speed dependent linear connections (stiffness, damping, and mass coefficients vs speed) Non-linear force-displacement for tip rubs and deadband (axial, radial, and tangential forces) Nodal constraints Frequency response functions in future release Embedded fluid film and rolling element bearing mechanics Specify geometry and lubricant, program determines deflection at bearing iteratively Rolling element model considers ball and roller bearings, solves hertzian contact with traction effects Fluid film model includes journal bearings, squeeze films, tilt pads, and hydrostatic bearings Complete set of graphical displays and text listings Geometry, deformed, and contour plots Complete user control of boundary conditions and load displays Whirl maps, stability maps, and mode shapes Nodal displacements, support loads, and temperatures versus speed or time Mode shapes and deformed mesh can be animated (and exported) Time histories, orbits, and FFT spectra General and context-sensitive help system All plots and listings can be saved in standard graphics or text files Model, material properties, and lubricants imported/exported using XML files For substantially more information on iSTRDYN, including examples, FAQs, and downloading instructions, please click here to go to the program web siteTo download the paper describing the methodology used in iSTRDYN, go to About Us
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