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Ship as object

This app asks for a JSON file and gives back the pretty form of the JSON element. It also plots a 3D image of the ship. Sample data is loaded at startup.

Developed by: Elias Hasle, Vicente Alejandro Iváñez Encinas and Henrique M. Gaspar. Visualization made using three.js.

Input

Contents of the file:


				

			


			

				
3D orbit view of hull and parts

			

			

			


			

				
Whole ship

				
Ship specifications

				

					
						

							Variable
							Value
						

					

					
						

							Lenght Overall
							 m
						

						

							Breadth Overall
							 m
						

						

							Depth
							 m
						

						

							Design Draft
							 m
						

						

							Design speed
							 knots
						

						

							Lightweight
							 kg
						


					


				

				
Calculations

				

					
						

							Variable
							Hand value
							Calculated on Hidromax 
							Calculated value
							% diff
						


					

					
						

							Draft Amidships (m)
							
							
							
							
						

						

							Displacement (t)
							
							
							
							
						

						

							Waterline Lenght (m)
							
							
							
							
						

						

							Maximum Waterline Breath (m)
							
							
							
							
						

						

							Wetted area (m2)
							
							
							
							
						

						

							Waterplane Area (m2)
							
							
							
							
						

						

							Cb
							
							
							
							
						

						

							LCB (m)
							
							
							
							
						

						

							LCF (m)
							
							
							
							
						

						

							KB (m)
							
							
							
							
						

						

							KG (m)
							
							
							
							
						

						

							BM (m)
							
							
							
							
						

						

							GM (m)
							
							
							
							
						

						

							Trim (m)
							
							
							
							
						

						

							Trim (º)
							
							
							
							
						

						

							Draft at FP (m)
							
							
							
							
						

						

							Draft AP (m)
							
							
							
							
						

						

							Heel (m)
							
							
							
							
						


					

				

				
General arrangement

				
Specification

				

					
						

							ID
							Lenght
							Breadth
							Height
							Deadweight
						

					

					
						

							Block0
							 m
							 m
							 m
							 kg
						

						

							Block0
							 m
							 m
							 m
							 kg
						

						

							Block2
							 m
							 m
							 m
							 kg
						


					

				

				
Calculations

				

					
						
Variable
						Hand value
						Calculated value
					


					
						

							Deadweight (kg)
							
							
							
							
						

						

							Total area (m2)
							
							
							
							
						

						

							Total Volume (m3)
							
							
							
							
						

					

				

				

				

			

			




			

				

					
The method above aims to validate the calculation method
						presented by vessel.js file. The main idea is to use a simple hull
						geometry (presented here by a triangular hull) and compare it with two
						other calculation methods: analical formulation and numerical method
						using maxsurf/hidromax software. The hand and Hidromax calculation
						is specifical for the triangular geometry described in blockCase.json
						and it may not work fine for other types of geometry. The explanation
						of the steps followed by the 
							open code are presented bellow.

					

					

				

				
    
					
    
						
  1. Use the library and vessel.js to calculate hydrostatics
    2. 
					
    
					
      
						
      
							
    • Get all compartments informations and calculate centers of gravity
      • 
						
      
						
      THREE.FileLoader().load("data/ship_specifications/blockCase.json", useFileData);
      
						
      let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[0]];
      
						
      let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[1]];
      
						
      let block0 = ship.baseObjects[Object.keys(ship.baseObjects)[2]];
      
						
      
							
    • Calculate draft from deadweight
      • 
						
      
						
      let a = ship.calculateStability();
      
						
      let draftc = a.T.toFixed(3);
      
						
      
							
    • Use the draft to calculate hydrostatics
      • 
						
      
						
      let ha = ship.structure.hull.calculateAttributesAtDraft(draftc);
      
						
      
							
    • List all the calculated values under "Calculated value" column
      • 
						
      
					
    
					
    
					
    
						
  2. Reproduce all values by analytical calculations method
    3. 
					
    
					
      
						
      
							
    • Get the same draft outputed from the vessel.js
      • 
						
      
						
      let draftms = a.T;
      
						
      
							
    • Calculate hidrostatics and list values under "Hand value" column
      • 
						
      
					
    
					
    
					
    
						
  3. Insert data in the maxsurf program
    4. 
					
    
					
      
						
      
							
    • Calculate hidrostatics and list values under " Calculated on Hidromax" column
      •