ROMAC Software Cataloged by Analysis Type
 
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User Interfaces Fluid Film Journal Bearings, Analysis Fluid Film Bearings, Design Magnetic Bearings, Analysis Magnetic Bearings, Design Lateral Stability Lateral Critical Speeds
Lateral Forced Response Lateral Transients Torsional Critical Speeds Torsional Forced Response Torsional Transients Seal Analysis Fluid Film Thrust Bearings, Analysis
Balancing Expert Systems, Diagnosis Pump Analysis Plotting Other    

Category Name Version PC Unix Description
User Interface

back to top		 ROTORLAB 7.7.6 yes no RotorLab is a highly integrated graphical user interface which embeds the most commonly used ROMAC codes in an easy to use parts bin based presentation.
SHELL 1.33 yes no The ROMAC Shell is a lower level user interface which is completely open: any executable which can run under Windows can be bound into this shell. The interface provides a simple way to select codes and to set up their data files and other needed execution decisions.
PRE2D 2.00 yes no  
Fluid Film Journal Bearings, Analysis

back to top		 DAMBRG2 2.21 yes no DAMBRG2 calculates dynamic coefficients, power losses, and rigid rotor stability information for two-lobe isoviscous bearings with a pressure dam in only one pad. Opposite to the dam the user may specify the presence of a track. The code solves the two-dimensional Reynolds Equation including an optional linearized turbulence model.
HYDROB 2.10 yes no HYDROB predicts the steady-state and dynamic operating characteristics for hybrid journal bearings where hydrostatic and hydrodynamic effects are present. No axial grooves may be present. ROMAC Report No. 457.
HYDROBRG 1.00 yes no HYDROBRG predicts the steady-state and dynamic operating characteristics for hybrid journal bearings where hydrostatic and hydrodynamic effects are present. The operating characteristics predicted by the program include the film thickness distribution, film pressure distribution, shaft position, load capacity, stiffness and dampings. The analysis can include effects due to cavitation. A finite element method is used. Axial grooves may be present as well as different pocket geometries on each pad. Pocket discharge orifice coefficients are calculated internally. ROMAC Report No. 511.
PDAM2D 2.10 yes no A multiple pad pressure dam bearing can be analyzed by this program. The geometry of each pad can be different as specified by the user. It calculates the journal equilibrium position, linearized stiffness and damping coefficients, and rigid rotor stability threshold. The full two dimensional Reynolds equation is solved for each pad. This program is an extension of DAMBRG2 which solves for a bearing with a single pressure dam.
SQFDAMP 1.11 yes no This program determines stiffness and damping coefficients for short and long squeeze film bearings with and without fluid film cavitation.
THBRG 2.47 yes yes THBRG calculates the pressure profiles, temperature distribution in film and bearing housing, lubricant flow rates, power loss, and dynamic coefficients for a multilobe journal bearing with an incompressible lubricant. A combination of finite element and finite difference methods are used to solve the governing equations. THBRG uses an assumed axial pressure profile and an assumed cross-film viscosity variation to decrease the dimensionality of the problem to the circumferential direction only. This significantly increases the speed of the program while retaining high accuracy. The analysis includes fluid film conduction, cross-film viscosity variation, two-phase cavitation models for the energy equation, conduction in the housing, convection heat transfer from housing and turbulence.
THPAD 2.76 yes no THPAD calculates the pressure profiles, temperature distribution in film and bearing components, lubricant flow rates, power loss, and dynamic coefficients for a tilting pad journal bearing with an incompressible lubricant. A combination of finite element and finite difference methods are used to solve the governing equations. THPAD uses an assumed axial pressure profile and an assumed cross-film viscosity variation to decrease the dimensionality of the problem to the circumferential direction only. This significantly increases the speed of the program while retaining high accuracy. The analysis includes pad mechanical and thermal deformations, journal thermal deformation, fluid film conduction, cross-film viscosity variation, pivot deformation, two-phase cavitation models for the energy equation, and turbulence.
MAXBRG 5.0 yes no MAXBRG is a 2-D finite element code that performs steady state TEHD analysis for fluid film journal bearings. It is able to analyze a wide variety of bearings including fixed geometry, pressure dam and tilting pad bearings. Special models are applied for directed lubricated tilting pad bearings which employ grooves or spray bars. In addition to the normal flooded oil feed condition, starvation can be examined as well as axial flow and high ambient pressure conditions.
FINBRG 1.31 yes no  
FJBCOF 3.00 yes no  
HYDRB 1.20 yes no  
JNLBRG 2.00 yes no  
LOOKUP 1.00 yes no Journal bearing data storage and lookup program.
PADCON 1.00 yes no  
PADFEM 1.20 yes no  
TEMBRG 4.50 yes no  
TEMCON 1.10 yes no  
TMSBRG1D 1.00 yes no  
TMSBRG2D 1.00 yes no  
VERTPB 1.10 yes no A finite element analysis of vertical, zero load tilt pad bearing coefficients using the pad assembly method.
Fluid Film Bearings, Design

back to top		 ACCDES 3.02 yes no  
BRGDES 1.00 yes no  
BRGOPT 1.00 yes no  
PLACEBRG 1.00 yes no  
Magnetic Bearings, Analysis

back to top		 AXMAG 5.20 yes no  
MAGAUD   yes no Magnetic bearing audit package. Includes a number of codes for constructing system models, for assessing actuator performance, for determining system forced response and stability, and for converting measured frequency response functions into equivalent (approximate) transfer functions.
MAGSTAB 2.15 yes no Lateral stability of a single rotor with magnetic bearings.
ROTLOSS 1.00 yes no Rotating losses in magnetic bearing journals.
Magnetic Bearings, Design

back to top		 MAGDES2 1.00 yes no  
Lateral Stability

back to top		 FSTB3 1.34 yes yes This program calculates the stability, damped critical speeds (eigenvalues), and elliptical whirl mode shapes for multi-spool rotor systems. Linearized fixed geometry bearing coefficients, linearized complete tilting-pad bearing models, and/or linearized collocated/non-collocated magnetic bearing models in the form of transfer functions may be used as rotor support mechanisms. The program includes gyroscopic, rotary inertia, shear deformation, and aerodynamic cross-coupling models.
ComboRotor 2.1 Beta yes no  
Matlab Rotor Code 2.0 Beta yes no  
ROTSTB 7.19 yes no This program calculates the stability, damped critical speeds (eigenvalues), and elliptical whirl mode shapes for single spool rotors. Linearized fixed geometry bearing coefficients, linearized complete tilting pad bearing models, and/or linearized collocated/non-collocated magnetic bearing models in the form of transfer functions are allowed. The program supports flexible support models with each bearing type. The program uses the transfer matrix method in non-dimensional form and includes the effects of gyroscopics, rotary inertia, shear deformation, aerodynamic cross coupling, and hysteretic damping. Rotor cross-section and damped mode shape plots are possible.
FORSTAB 1.92 yes no  
ROTSTBMS 1.20 yes no Stability of single-spool rotor-bearing systems including multiple degree of freedom substructure.
Lateral Critical Speeds

back to top		 CRTSP2 3.09 yes no CRTSP2 calculates the undamped planar critical speeds of dual-level rotor systems using the transfer matrix method. The method includes rotary inertia, shear deformation, circularly symmetric gyroscopic, and lumped inertia effects. Both translational and rotational springs may couple the rotors or tie the rotors to ground. Rotor model and modeshape plots are possible. A critical speed plot may also be produced if more than one bearing configuration is considered. CRTSP2 may be used to produce the modal input for other codes such as FRESP2 and COTRAN.
MODFR2 2.35 yes no MODFR2 is used to determine the undamped planar critical speeds of single or dual level rotor systems using the finite element modeling method. The approach includes rotary inertia, lumped inertia effects, translational and rotational springs, lumped and consistent mass options, but does not include gyroscopic effects. MODFR2 can be run with or without coupling the rotor system to ground and, therefore, is ideally suited to producing the modal input for other codes such as FRESP2 and COTRAN.
CRTSP2T 1.10 yes no  
CRTSPDM 09 Dec 1976 yes no  
MODFRE 1.13 yes no Natural frequencies and mode shapes for rotors with many mass stations.
Lateral Forced Response

back to top		 FRESP2 3.00 yes no This program is a modal frequency response program for analyzing the forced response of a dual rotor system with flexible substructure. The program allows the user to analyze a system with unbalance or generalized forces on the rotor, or general forces, displacements, or accelerations applied to the substructure. Generalized speed dependent coupling coefficients are used to represent bearings, seals, and aerodynamic cross-couplings.
RESP2V3 3.02 yes no This program calculates the non-planar synchronous unbalance response of dual-level multimass flexible rotors (or rotors with flexible casing) using a transfer matrix approach. The modeling includes gyroscopic, rotary inertia, shear deformation, and hysteretic damping effects. Speed-dependent linearized bearing coefficients (with linear interpolation by the program as needed) are supported.
EQBRG 1.00 yes no Equilibrium of a multi-bearing rotor system.
FLEXCOP 1.10 yes no The effect of flexible couplings on the undamped lateral vibrations of rotor-bearing systems
FRESP3 1.10 yes no  
FRESP4 3.00 yes no  
FRESPN 1.10 yes no  
RESP2V5 5.10 yes no  
Lateral Transients

back to top		 COTRAN 3.00 yes no Nonlinear time transient program for multi-level rotors with substructure. Program uses modal input from CRTSP2 or MODFR2 to create small order inverse mass and stiffness matrices for master degrees of freedom which are integrated forward in time using Newmark's method. Nonlinearities include hydrodynamic bearings and rubs.
Torsional Critical Speeds

back to top		 TWIST2 3.13 yes yes Program TWIST2 calculates the undamped torsional natural frequencies and mode shapes for single shafts, geared shafting with branching, or looped systems. The finite element method is used to obtain the set of equations governing the motion of the system. The program also determines the steady-state forced response characteristics of the system from harmonic torsional input using modal analysis. In the forced response calculations, damping may be added to the system through modal damping ratios or discrete dampers. The input torque magnitudes and phases may be specified as a function of excitation frequency. In addition, several modeling features such as penetration factors are included.
CRITTOR 1.00 yes no  
Torsional Forced Response

back to top		 TWIST 1.00 yes no  
Torsional Transients

back to top		 TORTRAN2 1.11 yes no This program is a computational tool designed to aid in torsional failure prediction. It computes the following information about the rotor system: rigid body angular velocity and acceleration; rotor startup time; transient angular velocity, torque and stress; and, estimated rotor lifetime.
TORTRAN3 2.00 yes no TORTRAN3 is a transient response program for torsional rotor systems. It can analyze rotor systems with non-linear couplings that are driven by synchronous machines, variable frequency drives, or any other torsional forcing function that can be expressed as a function of time or rotor speed. One important feature of TORTRAN3 is its cumulative fatigue analysis. Rotors that undergo large periodic loading, such as synchronous motor driven machines during startup, may fail after a finite number of starts.
TORTRAN 1.10 yes no  
Seal Analysis

back to top		 HCOMB 1.01 yes no This program solves the bulk-flow equations for the adiabatic flow of a compressible gas within a straight-through honeycomb seal. It calculates the leakage and the dynamic coefficients.
LABY3 1.12 yes yes LABY3 calculates the leakage flow and dynamic coefficients for compressible fluid straight-through and uniform interlocking type labyrinth seals. Teeth may be specified on the rotor, stator, or both. The method of Iwatsubo, as improved by Childs, is used as the theoretical basis.
SEAL2 1.40 yes yes This program calculates steady state load capacity, stiffness and damping coefficients for plain and grooved seals with incompressible turbulent axial flow. (New Version 1.2.)
SEAL3 3.00 yes no This program uses a bulk fluid flow perturbation analysis to evaluate rotor dynamic coefficients for stiffness, damping and mass coefficients. It can analyze both plain and circumferentially grooved seals. It adds inlet swirl, mass coefficients and surface roughness.
TURSEAL 2.12 yes yes This program calculates the stiffness and damping coefficients of turbulent flow annular seals or water lubricated bearings using finite elements. Finite length seals and variable circumferential and axial Reynolds numbers are considered. Turbulence coefficients based on the data of Elrod and Ng are utilized through curve fits. The program has also been found to work well for laminar flow.
HSEAL 1.00 yes no  
LABY1   yes no  
LABY2   yes no  
Fluid Film Thrust Bearings, Analysis

back to top 		THRUST 5.0 yes yes THRUST predicts the steady-state operating characteristics of tilting-pad and fixed geomety fluid-film thrust bearings. The operating characteristics predicted by the program include the film thickness distribution, film temperature distribution, pad and runner temperature distribution, power losses, flow requirements, and pad and runner elastic deformation. The analysis includes effects due to cavitation, turbulence, cross-film viscosity variation, centrifugal inertia, temperature and pressure dependent viscosity, crowns, and detailed pad models.
Balancing

back to top		 BALOPT 1.31 yes no This state of the art program provides multiplane and multispeed capabilities with the options of least squares or min-max balancing solutions. Influence coefficients can either be calculated or user-specified. Runout compensation and constraint capabilities are included. Practical constraints can be handled through weighting or directly specified such as response amplitude or maximum correction weight. Correction weight splitting is also available.
LTSQAP 1.00 yes no This program employs the least squares method for error balancing based on the calculation of system influence coefficients. It can handle up to 5 unbalance planes, 10 speeds, 10 probes and accounts for residual run-out or shaft bow.
RBALINF 09 Jan 1973 yes no
Expert System, Diagnosis

back to top		 ROMEX   yes no  
Pump Analysis

back to top		 FINCOM 1.00 yes no The effect of passage shape on the performance of vaneless diffusers.
Plotting

back to top		 BRGPLT 1.01 yes no  
COGRAF 3.00 yes no  
CRTPLT 1.03 yes no  
D3PLOT 4.20 yes no  
MODEPLT 7.34 yes no  
PADPLT 1.01 yes no  
PLOTSTB 1.32 yes no  
PLOTTWIST2 3.10 yes no  
RESPGEO 3.00 yes no  
RESPLOT 1.12 yes no  
ROTPLT 7.00 yes no  
SPLOT 1.00 yes no  
Other

back to top		 DTRANSF 1.00 yes no  
MATPRO 7.4.2 yes no  
MSUPPORT 1.00 yes no  
PREDES 3.02 yes no  
PTEMP 1.10 yes no  
DAO_Install   yes no Install DAO drivers