Introduction Single Lift Dock Gantry Twin Lift Dock Gantry Offshore Lattice Dock Pedestal Ship Pedesatal Tower Crane Truck-Mounted Telescopic Truck-Mounted Lattice Ship Gantry Rubber Tire Gantry Stationary Configuration Rover Configuration MidSize Configuration Portable Configuration Crane Customization

Twin Lift Dock Gantry Simulator

This module simulates a Dock Gantry Twin-Lift Container Crane. The crane simulated is capable of loading 20-foot containers in tandem or singularly from a ship to the shore and vice versa. The specifications on this crane include variable hoist speed, trolley speed, and hoisting capacity.

General Characteristics:

• Realistic control stand, control panel, and operator's chair
  
• 3-axis hydraulic motion base that provides sensation of movement and motion, jolts from collisions, crane depression as a heavy load is lifted, bumps from uneven rail gaps, and the many other jolts and vibrations of normal crane operations.
  
• Instructor's station with display of student view
  
• Surround sound effects including engine/motor engaging and disengaging, radio communications with foreman (instructor), wind, collision, and miscellaneous environmental sounds
  
• Variable weather conditions including wind (variable speed, direction, and interval), sunny conditions where sun is fixed and shadows are cast realistically, and cloudy conditions with no shadows for depth cueing
  
• Real-time photo-textured 3-dimensional graphics
  
• Accurate representations of the ship, hatches, dock and water from the operator's field of view

Operating Procedures and Characteristics:

• Loading and unloading 40 foot containers (to and from deck, hold, or chassis)
• Removing and replacing the hatch cover
• Maneuvering into the hold
• Landing into the hold (monitoring slack cable)
• Flipper operation (all four, landside, seaside)
• Use of flipper bypass
• Twistlock operation
• Use of twistlock bypass
• Setting trim and skew adjustments
• Landing on a chassis
• Simultaneous hoist and trolley
• Placing container into hold or on to chassis by placing one end first and then sliding in the other end
• Loading and unloading containers where stackers are installed on or removed from the deck
• Returning to the washrack
•  

Optional Procedures and Features:

• Loading and unloading 20 foot containers - "Russian Stow" version
• Single lift capability
• Lock/Unlock lights included on head frame

Visual Effects and Graphics Display:

• A forward field of view with approximately 50 degrees of horizontal view
• Realistic representations of crane structural members
• Load swing as a result of collisions with buildings, equipment, or other loads
• Main wire swing as a result of load swing

Problem Conditions:

• Avoiding twisting (helicopter motion)
• Monitoring bologna cable during heavy wind conditions
• Container or spreader stuck in hold
• Hoist overtorque
• Avoiding damage to containers and vehicles
• Bouncing off vehicle, dock, or ship
• Avoiding excessive swing
• Avoiding collisions
• Loading or unloading container on raked chassis
• Hanging up on rails in hold
• Unbalanced container loads
• Traffic in lanes
• Blocked container locking holes
• Container hung on chassis (vehicle is lifted)
• Container hung on deck
• Twistlock operation failure
• Twistlocks operate by no connection (right or left end)
• Flipper activation failure
• Bypassable flipper activation failure
• Trolley limit switch failure
• Loading and unloading containers with a gap between containers
• Loading and unloading where operator is unable to use flippers and there are no cell guides

Summary Reports:

• Date
• Start time of simulation
• End time of simulation
• Elapsed time of simulation
• Number and type of loads moved
• Average moves per hour
• Number of major collisions
• Number of minor collisions
• Total number of collisions
• Performance plots

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