Transfer Matrix Rotordynamics Analysis

Capabilities

RAPPID™ transfer matrix rotordynamics analysis software can model a single line of elements (i.e., rotor to ground) consisting of two concentric beams for a variety of analyses, including:

• Undamped critical speeds and mode shapes
• Damped critical speeds and mode shapes
• Synchronous and asynchronous forced response
• Lateral and torsional analysis

Advanced Features

RAPPID™ transfer matrix rotordynamics analysis software is up to 100 times faster than FEA based codes and no less accurate. Advanced modelling features are available including:

• Unlimited number of interconnections and stations in rotor model
• Up to 24 rotordynamic coefficients for each interconnection (12 lateral, 12 moment)
• Utilizes polynomial solution method, never misses modes
• Direct inclusion of housing transfer function (rap test data)
• Analysis may be function of any system parameter that affects rotordynamic coefficients
• Direct inclusion of housing transfer function (rap test data)
• Forcing functions may be defined with constant or frequency squared magnitudes

Postprocessing

RAPPID™ transfer matrix rotordynamics analysis software has unique postprocessing capabilities, including:

• Automatic generation of geometry plot with only user selected nodes and load paths
• Natural Frequency Map, Stability Map, Root Locus Plot, and 3-D Mode Shapes
• Rotor modes are automatically sorted and labeled along with user defined operating range
• User defined harmoic lines are displayed and interferences automatically labeled
• Mode Shape plots with natural frequency, synchronous critical speed(s), stability parameter, and whirl direction
• Rotor Displacements, Dynamic Loads, and Response Shapes.
• Response plots are created in fixed X-Y and rotating Major/Minor coordinate systems
• Amplification factors (AF) automatically calculated
• AF displayed on X-Y response plots with corresponding peak frequency response
• User defined rub limits displayed on Major/Minor response plots
• Separation margins relative to a user defined operating range are automatically displayed
• Plot responses from different rotor stations and/or different analysis runs on same plot
• Animation program included to illustrate rotor modes amd response shapes