Power Rail Track

7/28/2019 Power Rail Track

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Date

Bentley Power Rail Track SELECTseries 2

Richard W. Bradshaw - Development


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Geometry EnhancementsHorizontal and vertical alignment enhancements for rail design


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The .lck is no longer used, the who is persisted to the.alg In SELECTseries 2 Refresh 2!

Why? So that we can now manage the .alg within aProjectWise environment without exporting to a folder Well you can still export to a folder, if you want

But, if you set a variable then the software will always get andput to the ProjectWise server!

In SELECTseries 2 Refresh 3!

Geometry Projects & Multi-user Access


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An important change in workflow In SELECTseries 2 Refresh 3!

When you open the file from ProjectWise, check on theread-only check box!

Opening a .alg from ProjectWise


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Additional Cubic Parabola Definitions

Supported cubic parabolas Czech

Along tangent (Czech)

Along arc (Italian)

New South Wales Western Australia

MX cubic Along tangent

Along arc



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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 ofspecific 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

Quickhorizontal regression A first pass automatic regression

Includes lines, circular arcs and spirals

Resolves long straights into multiple straights

Quickvertical 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 RegressionPointslist-view

Automatically occurs with Select & Regress option


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Sometimes in light rail the transition spirals are replacedwith A series of compound curves with fixed length segments

Matching up with bending machine capabilities

We could use a standard set of elements in Multi-ElementRegression Analysis, but it was too limiting!

Added Add Free Horizontal Curve


Light Rail & Compound Curves


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Profile Annotation of Multiple Alignments


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Cant / Superelevation DesignSpecialized geometry for track cant / superelevation


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Cant / Superelevation

Standard internationalrailwayterminology Equilibrium cant, applied cant,

cant deficiency, etc.

Imperial or metric units

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 Mix transitions types


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Cant Alignment Editor

Creation based upon Equilibrium equations

Alternate speed

User defined tables

S-type transitions (i.e. cosine)


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TurnoutsSpecialized geometry that conforms to well defined bending rules


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Turnouts

Single, doubles and slips Tangential

Non-tangential turnouts

Multiple bending methods tosatisfy various industry standards!


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Create Turnouts Create Connection

Connection Editor

Create Verticals

Create Shunt Limit

Display in Plan / Display in Profile

Turnout Library

Turnout Reports

Turnouts


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Create turnouts either In Alignment

As defined on dialog

Interactively

In Space Create by .1, .0or.2

Honor point snap with an offset from snapped point

Extend mainline by length (Interactive)

Oriented to LeftorRight

Oriented as LeadingorTrailing

Create Turnout


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Simpler than Connection Editor Create a crossover

As defined on dialog

Interactively Identify beginning turnout

Identify ending alignment

Ending turnout is the same style as the starting turnout

The software determines the connecting geometry!

Connection length / radius are primarily for UK users! Length / radius are table lookups by user

May not create collinear geometry at .3

Create Connection


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Used to create / edit complex geometries involvingturnouts! Maintains rules

Maintains relationships

Recalls previous fixities Edit just about anything

Style

Geometry

Connection Editor


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Maintains mainline track plane through turnout Alternate Solver

Creates best solution, especially when in adverse cant!

Use View Rails to push the rails into a model forRoadway Designer

Create Vertical Through a Crossover


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Plan View Profile View

Display Turnouts


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XML / XSL Civil Report Browser

Turnout Reports


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You need to understand the settings and you need toget this right!

Create / edit standard turnouts

Single

Double

Single / Double Slips

Crossings

Bending by Swiss orGerman rules Rf= ( Rm x Rb ) / ( Rm +/- Rb )

Rf= ( Rm x Rb - T2 ) / ( Rm +/- Rb )

Turnout Library


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Length along mainline Triangle length

Ratio

Branch geometry It should be obvious that the

geometry is over-determined!

Turnout Library Fundamental Geometry


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Optional Linear

Rf= Rm

Circular Rf= ( Rm x Rb ) / ( Rm +/- Rb )

Rf= ( Rm x Rb - T2 ) / ( Rm +/- Rb )

Last Long Sleeper Adds a point to a turnout

Display and Reporting

Turnout Library Standard Sleeper Sets


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Maintains Length along mainline held

Can be applied to inner or outer rail

Coordinate Positions .1, .2, .0 and .3 held

Tangential Directions .1 tangential compromised

.2 tangential held

.3 tangential held

Radii Rf= ( Rm x Rb ) / ( Rm +/- Rb )

Swiss Bending Methodology


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Maintains Length along mainline held, but it is interpreted as the sub-

tangentlength not the centerline length!

Coordinate Positions .1, .2, .0 and .3 held

Tangential Directions .1 tangential held

.2 tangential held

.3 tangential held

Radii Rf= ( Rm x Rb - T

2 ) / ( Rm +/- Rb )

Introduces T2 into the equation

German Bending Methodology


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Tuned to UK practice Creates line-strings only, no real geometry!

Ultimately, this methodology will be replaced with Swiss orGerman rules and methods

Switch & Crossing Library


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And how it will be build!

Lets Remember What We Are Building


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Design CheckingDetailed design checking based upon simple built-in rules to specific / comprehensiverailway rules


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Built in Design Checking

Cant Alignment Editorincludes basic parameters fordesign checking

Visual checking with Display Turnouts


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More Comprehensive Design Checks

Includes CEN Standards Austrian Rail

Danish Rail

Dutch Rail

German Rail

Italian Rail

Russian

Transrapid (maglev)

Written to match a railways requirements


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Light Rail ManufacturingSpecialized functionality for the light rail systems


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Light Rail Design & Manufacturing

Specialized functionality for light rail systems Switches and crossings are generally unique geometry

Jointed rail

Pre-bent rails

Pre-drilled rails

Distance keepers


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Rails

Build with horizontal, vertical & cant Also, remember Add Free Horizontal

Curve in SELECTseries 2 Refresh 3 as anoption to transition spirals

Multiple rails per track Dual gauge systems

2D or 3D

Apply rail profile / cross section Apply widening / bending corrections


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Key Points, Switches, Crossings & Joints

Key points are special points at switches and crossings Joints

Placed between key points

Specific rules Outside rail

Minimum length


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Distance Keepers

Maintain track gauge Placed between joints

Specific rules Outside rail

Distance from start and end Distance between


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Rails Joints, crossings & key-points

Distance keepers

Light Rail Model


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The model is used for fabrication and


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a week-ends construction project!

Last train late Friday, first train early Monday


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Swept Envelope AnalysisFunctionality for the creation of vehicle swept envelopes


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Before Going Any Further, A Definition

From the British Railways Track, Volume 9, Track Terminology book:

Swept Path The plan area occupied by a rail vehicle as it moves along atrack. The width of the swept path at any point is the same as the width ofthe swept envelope at that point.

Swept Envelope The kinematic envelope enlarged to allow for theeffects of vertical and horizontal curvature, including end throw and

centre throw of vehicles and cant applied to the track. Kinematic Envelope The cross-sectional profile if a rail vehicle enlarged

to include the effects of dynamic sway and vertical movement caused byspeed, track curvature and cant, track position tolerances, rail wear, railhead/wheel flange clearances, tilt, vehicle wear and suspension

performance at the particular location under consideration. Abbreviated toKE.


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Swept Envelope Analysis

Functionality for the creation of swept path / sweptenvelopes Results can be

Horizontal projection only or

Interactive or

3D mesh

Up to 3 vehicles in tandem

Uses horizontal, vertical and cant geometries You can also load a .nwm (i.e. Overhead Line Network Model) file and use

the user defined paths for Swept Envelope Analysis! Use a copy of the.nwm!


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Vehicle Library

Manages an XML based file of vehicles ..\Bentley\PowerRailTrack V8i (SELECTSeries 2)\..

\data\metric\swept envelope vehicles.xml

A selective / interactive import from .dgn

Bogie points Optional articulation points

Front, middle & rear sections


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2D / 3D Results


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Roadway Designer for TrackUtilizing Roadway Designer for modeling track and earthwork (and this will be verybrief!)


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Earthwork Modeling & Templates

Components Closed shapes that represent manmade materials

Ballast

Subballast

Sleepers / ties Other materials

End conditions Ditches

Cut / fill slopes Similar to roads!


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Earthwork Modeling & Roadway Designer

Utilize alignment model Horizontal

Vertical

Cant

Define model specifics Typical sections

Point controls Cant

Shoulder widening Minimum ballast depth

Etc.


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A 3D Model

C ti i t E h d C t


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Continuing to Enhance and CreateGlobal Rail Solutions!

Questions?

Documents

Power Rail Track