© 2009 bentley systems, incorporated richard w. bradshaw director of development – rail design...
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Richard W. Bradshaw Director of Development – Rail Design
Bentley Rail Update
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BackgroundJust a bit of background on Bentley Rail Track
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Bentley Rail Track is a Global Solution!
• Bentley Rail Track is suitable for designing– Light rail– Heavy rail– High-speed rail
• Steel on steel or magnetic levitation systems
• Bentley Rail Track has been internationalized– Available in English, German, Spanish, Chinese plus
other languages
• Bentley Rail Track is localizable– Deliver standard turnouts– Build in railway specific design checking
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• Horizontal & horizontal alignment design– New design– Single and multi-element regression analysis for
maintenance / renewals
• Cant / superelevation design
• Turnouts
• Also includes specialized toolsets for– Design checking– Field to design / Design to field
• Machine to design to machine– Light rail manufacturing– Magnetic levitation
Bentley Rail Track offers…
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Major Differences Between Road & Rail
• Horizontal alignment design based upon cant (i.e. superelevation)– Arc or chord definition alignments– Horizontal spiral transition types
• Clothoids + cubic parabola, AREMA, bi-quadratic parabola, Bloss, sinusoid, cosine and Viennese
• 1 to 1 relationship between the horizontal transition and the cant transition
• Vertical alignment design– Parabolic vertical curves– Circular vertical curves + clothoids
• Turnouts are a type of geometry– Multiple types (single, double and slips)– Multiple bending methodology
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Alignment EnhancementsHorizontal and vertical alignment enhancements for rail design
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Rail Specific
• Additional Transition Spirals– AREMA
• Length along axis and chord definition• US freight standard
– Cubic’s• Multiple definitions
– Length along axis– Length along tangent
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Regression Workflow…
• Pre-regression data validation
• Point selection and sorting– Survey data ordering is not required
• Curvature diagrams– Indicates approximate locations of specific
elements and their types– Indicates questionable data– Inclusion of cant enhances the field data!
• Edit / review– Select / Regress, which is heads-up selection
/ auto element type determination!• Reduces potential user errors & time
– Quick Regression
• Slew diagrams and reporting
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Quick Regression
• Quick horizontal regression– A first pass – automatic regression
• Includes lines, circular arcs and spirals• Resolves long straights into multiple straights
• Quick vertical regression– Similar to horizontal– Includes a standard lift & a lines only option
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Single Element Regression Enhancement
• Single element regression with multiple alignments– Single element regress 2 or more alignments at once– Regressed elements will be parallel / concentric to
each other– Different offsets for each set of elements
• Enabled by right-clicking in Edit / Review Regression Points list-view
• Automatically occurs with Select & Regress option
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Cant / Superelevation DesignSpecialized geometry for track cant / superelevation
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Cant / Superelevation
• Standard international railway terminology– Equilibrium cant, applied
cant, cant deficiency, etc.
• Units– Millimeters, millimeters /
second– Inches, inches / second
• Calculations– Standard equilibrium
equations that can be found in well known literature
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Integrated into Horizontal Design
• Radius & spiral lengths based upon cant– Cant & Speed are persisted with the horizontal
elements– Suggests spiral lengths
• Imperial & metric are slightly different
– Enables design optimization
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Cant Alignment Editor
• Creation based upon– Equilibrium equations– Alternate speed– User defined tables
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TurnoutsSpecialized geometry that conforms to well defined bending rules
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View Options
• Single, double and slips– Tangential and non-tangential
turnouts
• Multiple bending / flexing methods to satisfy various industry standards!– Germany / Austrian– Swiss– UK
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Turnout Library
• Typical Turnout Library Editor– Creation of typical turnouts (standards)
• The software delivers various country standards– German (heavy & light rail)– UK (113A’s & RT60’s)– Indian Railways– Dutch Railways / ProRail– Spanish (heavy & light rail)– Or we will help you to create them
• AREMA Alternative (US + Canada)– Familiar terminology
• Matches AREMA Track Manuals• Delivered with the product
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Create Turnout
• Consolidated and minimized functionality differences• Interface changes based upon library• Create from the interface or interactively
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Create Turnout Connection
• Start with a single turnout and create a connection to a new turnout– A simplification to minimize using the Turnout
Connection Editor for simple crossovers– Ending turnout may match the beginning turnout– Connection is linear or circular, software makes the
determination!
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Turnout Connection Editor
• Used for more advanced geometric constructions– Crossovers– Sidings
• Editing an existing construction
• Maintains rules and relationships!
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Design CheckingDetailed design checking based upon simple built-in rules to specific comprehensive railway rules.
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Built in Design Checking
• Cant Alignment Editor includes basic parameters for design checking
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Turnout Design Checking
• Check for overlapping turnouts, turnouts in vertical curves, etc.
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More Comprehensive Design Checks
• Includes– CEN Standards– Austrian Rail– Danish Rail– ProRail / Dutch Rail– German Rail– Italian Rail– Transrapid
• Execute as you design– Interactive + passive
• Execute as a post-design process– Ideal for checking a consultant’s design
• Written to match the railway’s requirements
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User InterfaceAlong with changes discussed in the Geometry Update, lets look at rail specific changes.
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Additional Command Consistency
• View Horizontal & Vertical Regression Points– Additional content
• Other points of interest• Combined horizontal & vertical slews
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Additional Command Consistency
• Switch Height Plan
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Additional Command Consistency
• Turnouts
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Additional Interface Changes
• Smaller Dialogs
• Moved buttons to right-click popup menus
• And to avoid user panic, an Alert has been added!
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Configurable List View & Dialog Resizing
• Right click in title and select data of interest– Cant Alignment Editor– Edit / Review Regression Points– Check Integrity
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Less Clutter
• Eliminated tabbed dialogs
• Moved buttons to right click context sensitive pop-up menus
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Localizations Country specific enhancements to increase productivity
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Network Rail Localizations
• Display and annotation of S&C in accordance with Network Rail requirements– Unlikely scalable to others!
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ProRail Localizations
• Display and annotation in accordance with ProRail requirements– View Plan is specific to ProRail– View Track Centers is scalable to others!
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Italian Railway Localizations
• Display and annotation in accordance with Italian Railway requirements– Unlikely scalable to others, but tabling sparks future
development requirements!
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Other Cant Rules
• Integrating other rules into the system
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Austrian Railway
• Reading data from Plasser & Theurer’s EM-SAT geometry measurement system– Advanced long chord measuring resolved to real
world coordinates!
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Swept Path AnalysisNew functionality for the creation of vehicle swept paths
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Swept Path Analysis
• New functionality for the creation of swept path / vehicle envelopes– Results can be
• Horizontal projection only• Interactive or• 3D mesh
– Up to 3 vehicles in tandem– Uses horizontal, vertical and cant geometries
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Vehicle Library
• Manages an XML based file of vehicles– ..\Bentley Rail Track V8.11\data\metric\swept path
vehicles.xml
• Original data is 3D graphics
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Vehicle Definition
• A selective / interactive import from .dgn– Bogie points– Optional articulation points– Front, middle & rear sections
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Horizontal Project Only
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Interactive
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3D Mesh or Surface
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Bentley Rail Overhead LineA new product for the creation of overhead line equipment for electrified railways
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Overhead Line Design Process
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Starting with Bentley Rail Track
• Create a network model from– Bentley Rail Track geometry– LandXML
• System settings– System settings & design rules
• Create– Reference lines– Wire runs– Foundations, Masts & cantilevers and other
equipment– Perform engineering calculations based upon design
rules
• Resulting in a Rail Information Model
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Resulting in
• Textual data
• Graphical data– Plan View– Cross Section View
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And more details
• Graphical data and
• Non-graphic data
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Questions?