DyRoBeS^© Version 15.1 
  Partial List of Features & Improvements

• Engineering English With Weight or Mass Specified, Metric, or Consistent Units
• Capability to compute time transient motion by direct mass, stiffness matrix approach
  
• Same Model May Be Used for Torsional, As Well as Lateral Vibrations
  
• Multi-Lobe, Tilting Pad, and Pressure Dam Bearings, Including Temperature Effects
  
• Extensive Table of Lubricant Properties
  
• Capability for Larger Models With Maximum of 25 Shafts,
  and 200 Elements With Up to 20 Subelements Each
• Improved Computational Speed
• Advanced Tools Section for Disk Properties, Alford Forces,
  and Damper Calculations
• Active Magnetic Bearings
  
• Rotor Response Plots Showing Relative Displacements, Velocity, or Acceleration
• Bearing Forces Transmitted
• Squeeze Film Damper K&C Calculation Under Tools for a Given Eccentricity
  Ratio With Various Types of Motion and Damper Configurations
  
• Data Shown in the Output Plots Can Be Exported to an ASCII Output File
  
• Critical Speed Map Has the Capability to Vary All or Some Stiffnesses and Hold Others Fixed to Analyze Multi-Shaft Systems
  
• Enhanced Graphics and Output Capabilities; Bearing Position and Span Added; Lateral Vibration Velocity and Acceleration
  Multipliers and Labels; Unbalance Magnitude Added, in Addition to Phase Angle
  
• User-Friendly Bearing Data Input Menu
  
• Metric or English Units in the Design Tools (Aerodynamics, Rolling Elements, Disks, Dampers)
• Multi-Plane, Multi-Speed, Least-Squared-Error Rotor Balancing
• Enhanced Help Section and Manual of Command Structure
• Updated User's Manual
• Easy Conversion from English to Metric Units and Vice Versa
• Animation Files Now Have Option to be Saved as Either .BMP or .Gif Files
  
  BePERF
• Introduced Two Coordinate Systems in Bearing Analysis
• Added Thrust Bearings
• Added Gas Bearings
• Output K and C in Different Units
• Added Tapered Land Journal Bearing
• Added Worn Pocket Journal Bearing
• Added Boundary Conditions and Bearing Clearance Checking Features
• Added Conversion Units in Bearing Program
• Added Multiple Preloads for TPJ for a constant Cp
• Added Speed Labels in Postprocessor for Options and Settings
• Added Automatically Generated K & C Option in Preference Settings
• Added Additional Specified Speeds in Analysis
• Improved Heat Balance Calculation for Tilting-Pad Bearings.  Add Flow Effective Factor, Which Allows for Various Oil Supply Conditions. 
  Empirical Value Based Upon Many Lab Experiments Suggested
• Improved Computational Accuracy and Efficiency When Advanced Feature is Used
• Improved Many Output Displays
• Added Tools Option
• Changed Bearing Input Dialog Boxes to be Modeless Dialog Boxes, Which Stay on the Screen and are Available for Use at Any Time, But Permit Other User Activities
• Added Many More Examples
• Support Available in Two Help File Formats:  1)  .hlp compiled from RTF files; and 2) .chm Compiles from HTML Files
  
  CRITICAL SPEED ANALYSIS
• Spline Curve Fitting of Modes
• Bearing and Shaft Strain Energy
• Kinetic Energy Distribution
• Critical Speed Maps With User-Defined Bearing K Plot Superimposed
• Flexibly-Attached Disks
• Modal Stress Plot Feature
• Ability to Export Bearing Dynamic Coefficients in Critical Speed Map
  
  
  LATERAL RESPONSE
• Axial Flow Seals for Pump Analysis
• Open- and Closed-End Squeeze Film Dampers
• Turbochargers With Enhanced Floating Ring Bearings
• Linear or Nonlinear Rolling Element Bearings
• Nonlinear Plain and Squeeze Film Dampers for Synchronous Response
• Shaft Unbalance Response Including Shaft Bow, Radial Unbalance,and Disk Skew
• Enhanced Plotting Capability for Rotor Response, Bearing Forces
  Transmitted, and 3-Dimensional Animated Mode Shapes Caused
  by Unbalance
  
  TIME TRANSIENT ANALYSIS
• Advanced Numerical Integration Method With Choice of Runge-Kutta,
  Newmark-Beta, and Wilson-Theta
• Variable Rotor Speed for Shutdown and Run-up Analysis
• Evaluation of Orbiting Time-Dependent Forces
• Nonlinear Rolling Element Bearing Module for Analysis of Dead Band
  Effects and Simulated Rubs
• Nonlinear Analysis of Generalized Magnetic Bearings
• Input External Time-Dependent Disk or Shaft Loads to Simulate
  Maneuver Loads of an Aircraft Gas Turbine
• Simulation of Loss of Magnetic Bearing During Shutdown
•  Misalignment Added to Steady-State Response and Transient Analysis
• Restart option added Under Initial Conditions
  
  FLUID FILM BEARINGS
• Complete Bearing Calculations for Constraint or Variable Viscosity
  Conditions for:
      Plain Bearing
      Multi-Lobed Bearing
      Offset Half Bearing
      Tilting-Pad Bearing
      Pressure Dam Bearing
      Squeeze Film Dampers
      Turbulent Flow Axial Seals
  
  TOOLS FOR ROTOR DYNAMIC ANALYSIS
• Enhanced Tools for Assistance in Calculation of:
      Alford Aerodynamics
      Wachel Aerodynamics
      Deep-Groove or Angular Contact Ball Bearing
      Self-Aligning Ball Bearing
      Spherical Roller Bearing
      Straight Roller or Tapered Roller Bearing
      Liquid Annular Seal - Dynamic Coefficients
      Squeeze Film Damper Design Tools
      Inertia Properties of Homogeneous Solid
      Effective Bearing Impedance for (Brg+Support) Systems
      Elliptical orbit Analysis
      Balancing Calculation
•     Added Laby Seal Calculation under Tools (provided by Dr. Gordon Kirk)