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Ship Design

Ship Design. Ship Life Cycle. Definition of Requirement Determination of Data and Constraints Concept Design Preliminary Design Contract Design Detail Design Production Tests and Trials Service Scrapping. Definition of Requirements. Length. Definition of Requirements. Breadth Depth

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Ship Design

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  1. Ship Design

  2. Ship Life Cycle • Definition of Requirement • Determination of Data and Constraints • Concept Design • Preliminary Design • Contract Design • Detail Design • Production • Tests and Trials • Service • Scrapping

  3. Definition of Requirements Length Definition of Requirements Breadth Depth Draught Economic Analysis Choice Ship Life Empirical Calculations Strength Constraints (Design) Longitudinal Strength Form Seakeeping Manouvrability Form Selection Preliminary Control Constraints (Design Process) Calculationsr Machinery Selection Power Range Weather Deck Arrangement COnstraints (Design Environment) Ship Type Type Ship Area/ Weight General Arrangement Area Displacement Weight Next Design Step Design Spiral

  4. Design Through Selection

  5. Basic Ship Types • Weight Critical Ships • Volume Critical Ships • Unit Cargo Ships

  6. The Weight Equations (1) s : displacement due to shell, appendages L: LBP or LWL B: Breadth T: Draught

  7. The Weight Equations (2)

  8. DW/D Ratio

  9. DW/D Ratio

  10. Volume

  11. Volume

  12. Length Beam Relation

  13. Ship Length

  14. Critical Factors Effecting Ship Length • Construction limitations of the shipyard (Length of slipway, port limitations, canal limitations etc) • Structural-Regulative limitations (number of bulkheads, • Interference of bow waves and stern waves • L/D limitations of class societies

  15. Breadth • Resistance (L/B) considerations suggests minimum breadth • Stability (B/T, B/D) considerations suggests maximum breadth

  16. Length-Breadth Relation

  17. Length-Breadth Relation

  18. Beam-Depth Relation

  19. Beam-Draught Relation

  20. Draught-Depth Relation

  21. Length-Depth Relation

  22. Block Coefficient (CB)Alexander Formula K varies between 1.03 for high speed ships to 1.12 for slow ships • Lf: Ship length in feet • Vk : Ship speed in knots

  23. Block Coefficient (CB)

  24. Hull Weight (WH)

  25. Outfit Weight (WH)

  26. Outfit Weight (WO)

  27. Main Engine Weight

  28. Main Engine Weight

  29. Remainder Machinery Weight

  30. Total MachineryWeight for Diesel-Electric Ships

  31. Scrap Weight

  32. Nmber of Containers

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