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Ship Design PowerPoint PPT Presentation


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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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Ship design l.jpg

Ship Design


Ship life cycle l.jpg

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


Design spiral l.jpg

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


Design through selection l.jpg

Design Through Selection


Basic ship types l.jpg

Basic Ship Types

  • Weight Critical Ships

  • Volume Critical Ships

  • Unit Cargo Ships


The weight equations 1 l.jpg

The Weight Equations (1)

s : displacement due to shell, appendages

L: LBP or LWL

B: Breadth

T: Draught


The weight equations 2 l.jpg

The Weight Equations (2)


Dw d ratio l.jpg

DW/D Ratio


Dw d ratio9 l.jpg

DW/D Ratio


Volume l.jpg

Volume


Volume11 l.jpg

Volume


Length beam relation l.jpg

Length Beam Relation


Ship length l.jpg

Ship Length


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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


Breadth l.jpg

Breadth

  • Resistance (L/B) considerations suggests minimum breadth

  • Stability (B/T, B/D) considerations suggests maximum breadth


Length breadth relation l.jpg

Length-Breadth Relation


Length breadth relation17 l.jpg

Length-Breadth Relation


Beam depth relation l.jpg

Beam-Depth Relation


Beam d raught relation l.jpg

Beam-Draught Relation


Draught depth relation l.jpg

Draught-Depth Relation


Length depth relation l.jpg

Length-Depth Relation


Block coefficient c b alexander formula l.jpg

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


Block coefficient c b l.jpg

Block Coefficient (CB)


Hull weight w h l.jpg

Hull Weight (WH)


Outfit weight w h l.jpg

Outfit Weight (WH)


Outfit weight w o l.jpg

Outfit Weight (WO)


Main engine weight l.jpg

Main Engine Weight


Main engine weight28 l.jpg

Main Engine Weight


Remainder machinery weight l.jpg

Remainder Machinery Weight


Total machineryweight for diesel electric ships l.jpg

Total MachineryWeight for Diesel-Electric Ships


Scrap weight l.jpg

Scrap Weight


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Nmber of Containers


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