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Published byCody Cunningham Modified over 11 years ago
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A Data-Driven Monte Carlo Simulation Model of Vessel Movement in Harbors David Moser, Keith Hofseth, Shana Heisey, Richard Males, Cory Rogers HarborSym HarborSym
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Flood Damage Reduction Navigation Ecosystem Restoration Hurricane Protection CORPS OF ENGINEERS
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Coastal Navigation Benefit-cost analysis requiredBenefit-cost analysis required Navigation project benefits:Navigation project benefits: –Reduction in congestion (transportation cost) –Compare future conditions –50 year analysis Standardized, transparent toolsStandardized, transparent tools
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Photo credit: Containerisation International/Lloyds List/Informa UK Ltd Need for Navigation Modeling Complex Problem Channel width & depth constraintsChannel width & depth constraints Multi-port issuesMulti-port issues Conflicts from random interactionsConflicts from random interactions
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Navigation Modeling –Single port –Focus on channel improvements
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HarborSym Model Planning-Level ModelPlanning-Level Model Data InputData Input –Port layout –Vessel Calls –Rules Model CalculationModel Calculation –Vessel interactions within harbor OutputOutput –Time in system –Delay times
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HarborSym Modeling Objectives PORTABILITY –Port specific information provided in data EASE OF USE –Discrete Event Monte Carlo Simulation Model –C++ / Microsoft Access / Visual Basic TRANSPARENCY –Windows into delay calculations
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HarborSym Architecture Computational Engine (Simulation Kernel) Database User Interface RUN Report Graphics Output Data Files
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HarborSym Application Sabine-Neches Waterway Study Area TEXAS MEXICO
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NODES DocksDocks –133 actual docks –11 virtual docks 10 Turning Basins10 Turning Basins Channel DimensionsChannel Dimensions Proposed ImprovementsProposed Improvements REACHES Single route connecting nodes Uniform dimensions TOTAL: 47 LEG Contiguous reaches Sabine Network
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Network builder Data entry tables Data explorer Network Graphical User Interface
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Sabine Transit Rules No sailing (single vessel) –by DWT, length, beam No meeting (multi-vessel) –by DWT, length, breadth, draft, combination No overtaking (multi-vessel) –by vessel type
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Generic Transit Rules
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1.Vessel Arrival (departure) Event –Must pass all transit rules in leg to proceed 2.Conflict Checking –Store projected arrival/departure time of vessels in system (by reach) –Test rules in all leg reaches –Vessels already moving have priority 3.If conflict occurs: –Wait, try again –Proceed to anchorage Model Processing Logic
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Testing Conflicts in Reach
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Additional HarborSym Features Tidal Influence –Height of water –Strength of current Priority Vessels –Move unrestricted through harbor Cruise Ships, Gaseous TankersCruise Ships, Gaseous Tankers –Others anticipate arrival & face delays
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tide/current Vessel status Time of day Commodity movements Additional HarborSym Features Within Simulation Animation
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HarborSym Output Capturing Widening Benefits Time in hours, results from 100 iteration simulation.
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HarborSym Output Capturing Widening Benefits
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HarborSym Output Post Process Animation
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Discussion Discussion
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