US Army Corps of Engineers Engineer Research & Development Center Navigation Channel Design Using Real-Time Marine Simulation Don Wilson Chief – Navigation.

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Presentation transcript:

US Army Corps of Engineers Engineer Research & Development Center Navigation Channel Design Using Real-Time Marine Simulation Don Wilson Chief – Navigation Branch ERDC

US Army Corps of Engineers Engineer Research & Development Center Bringing the real world into a laboratory environment.

US Army Corps of Engineers Engineer Research & Development Center Why do we model navigation projects? Allows end-users a controlled environment to operate ships in their waterway of the future. –Safety check –Gets pilots “onboard” project. Allows comparison between multiple proposals. Allows optimization of channel dimensions. Provides rationalization of project design to competing interests. Because it’s the law.

US Army Corps of Engineers Engineer Research & Development Center ER Engineering and Design: Studies by Corps Hydraulic and Hydrologic Facilities and Others. –Paragraph 6b. Hydraulic design studies associated with the planning, design, construction, operation, and maintenance of of navigation channels will include a ship-simulation investigation unless omission of such an investigation is approved by HQUSACE. This policy does not pertain to the design of commercial small-craft harbor channels.

US Army Corps of Engineers Engineer Research & Development Center ERDC Ship/Tow Simulators Calculate & reproduce vessel response to forces. Real-Time –Movements require the same amount of time as real life. 240 degree field of view Wide variety of configurations. Two simulators –Function independently or couple for two-way traffic Can be reconfigured as tows for shallow draft studies.

US Army Corps of Engineers Engineer Research & Development Center Man In The Loop

US Army Corps of Engineers Engineer Research & Development Center Console Displays Displays commands –Wheel –Throttle Input commands –RPM –Viewing angle and position –Thrusters Display ship info –Speed –Rate of Turn Wind

US Army Corps of Engineers Engineer Research & Development Center ECDIS & Radar –Electronic Chart Display and Information System (ECDIS)

US Army Corps of Engineers Engineer Research & Development Center Operator’s Station Setup and monitor runs. Two stations, one for each simulator.

US Army Corps of Engineers Engineer Research & Development Center Two simulators for 2-way traffic

US Army Corps of Engineers Engineer Research & Development Center Forces Modeled

US Army Corps of Engineers Engineer Research & Development Center Six Degrees of Freedom

US Army Corps of Engineers Engineer Research & Development Center Steps for Conducting a Simulator- Based Navigation Study Reconnaissance Trip Database Preparation Validation Pretesting & Design Testing Result Analysis and Reporting

US Army Corps of Engineers Engineer Research & Development Center Reconnaissance Trip Meet with pilots Evaluate Port Operations Ride as many transits as possible –Clear with pilots, ship master, agent, customs –Severe Navigation Conditions Large ships Currents Two-way traffic Video & Photos

US Army Corps of Engineers Engineer Research & Development Center Database Preparation Visual Databases Environmental Databases

US Army Corps of Engineers Engineer Research & Development Center Visual Databases Represent the simulated world as realistically as possible. Visual Scene –Projected in front of pilot Radar –Radar console on bridge Electronic Chart Display and Information System (ECDIS) –ECDIS console on bridge

US Army Corps of Engineers Engineer Research & Development Center Visual Scene Include basic requirements for navigation. –Ownship bow image. Ownship is the vessel being simulated. –Shoreline –United States Coast Guard maintained Aids-to-Navigation (ATONS) –Informal ATONS Steeples, radio towers, etc. –Bridges. –Important docks and other structures. –Other vessels for two-way traffic. –Local structures to provide feel of realism.

US Army Corps of Engineers Engineer Research & Development Center Visual Scene Development All objects are constructed with three- and four- side polygons. Wire frames are then given a texture or “skin.”

US Army Corps of Engineers Engineer Research & Development Center Visual Scene Development Using digital images as a texture provides additional realism.

US Army Corps of Engineers Engineer Research & Development Center ECDIS Existing condition ECDIS is provided from simulator’s library of navigation charts. Development of future condition ECDIS may be necessary.

US Army Corps of Engineers Engineer Research & Development Center Environmental Databases Channel Definition. –Obtained from COE District Office –Bathymetric Surveys Currents –Usually a separate TABS-MD study Can model existing and proposed conditions –Acoustic Doppler Current Profiler (ADCP) Existing conditions only –Physical model Can model existing and proposed conditions Waves –Usually hindcasting study determines appropriate height/period/direction to be used during simulations Wind –Wind Roses and Pilot Experience

US Army Corps of Engineers Engineer Research & Development Center TABS-MD Model Brewerton / Tolchester Navigation Study Baltimore Tolchester Peninsula

US Army Corps of Engineers Engineer Research & Development Center TABS-MD Model Results

US Army Corps of Engineers Engineer Research & Development Center Simulation Validation Use Experienced Pilots Repeat Existing Condition Simulation Runs Isolate Forces When Possible –Slack Tide –No Wind Examine & Modify Databases as Required DGPS Survey –Vessel Track Plot –Record rudder & engine commands

US Army Corps of Engineers Engineer Research & Development Center Design Mode Operation Assemble Design Team –Corps District Office - Engineers & Planners –Local Mariners –Local Port –U.S. Coast Guard –WES Develop Several Possible Plans Test Plans Analyze, Modify, and Retest

US Army Corps of Engineers Engineer Research & Development Center Testing Procedure Test Various Plans –Existing –Proposed (Several to Optimize) Test "Maximum Credible Worst Case Scenario" Conduct in Random Order

US Army Corps of Engineers Engineer Research & Development Center Savannah Harbor

US Army Corps of Engineers Engineer Research & Development Center Data Recorded Position Heading Rudder Angle Engine Speed Ship Speed Yaw Angle Rate of Turn Tug/Thruster Usage Port and Starboard Clearances Vertical Motion due to Waves (every second)

US Army Corps of Engineers Engineer Research & Development Center Result Analysis Compare Simulation Runs –Existing –Proposed Vessel Track Plots Navigation Parameter Plots –Rudder –Engine Speed Pilot Evaluations

US Army Corps of Engineers Engineer Research & Development Center Track Plot, Houston Ship Channel 2-way run, Spillman’s Island Reach

US Army Corps of Engineers Engineer Research & Development Center Track Plot, Houston Ship Channel Overtaking Zone near Battleship Texas

US Army Corps of Engineers Engineer Research & Development Center Track Plot, Houston Ship Channel 2-way run, Lynchburg turn

US Army Corps of Engineers Engineer Research & Development Center Parameter Plot Houston Ship Channel

US Army Corps of Engineers Engineer Research & Development Center Arthur Kill Channels NY Harbor Deepening from 38 to 50 ft with some channel re- alignment to accommodate S-class containerships.

US Army Corps of Engineers Engineer Research & Development Center Arthur Kill Current Modeling

US Army Corps of Engineers Engineer Research & Development Center Arthur Kill Channel Dredging Contract Analysis Evaluate proposed areas to be buoyed off during construction of 40 ft project.

US Army Corps of Engineers Engineer Research & Development Center Four Dredging Locations Evaluated

US Army Corps of Engineers Engineer Research & Development Center Bridge Evaluation Optimize span widths. Determine proper span location.

US Army Corps of Engineers Engineer Research & Development Center Conclusions WES Operates Corps' marine simulator. –Simulate ship and/or tow traffic. –Operates in real time. –Evaluates proposed changes to federal channels. Existing conditions (base) Proposed conditions (one or more)