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Lecture 4 – Selection of Main dimensions - Coggle Diagram
Lecture 4 – Selection of Main dimensions
Why the selection of main dimensions
is key?
Load carrying capability (buoyancy)
Hull resistance in still and deep water and in waves
Stability (safety)
Seaworthiness
Longitudinal Strength
Cost efficiency
Length (L)
Required cargo capacity
Hull resistance
Longitudinal strength
Draught (T)
Generally, T should be as large as possible to
Enable a large propeller diameter for high energy efficiency
To minimize slamming in rough seas
Draft-length ratio T/L (≈0,035 - 0,05) affects the bow slamming in rough seas
Breadth (B)
Determined considering
Cargo carrying capacity
Transverse stability
Hull resistance
Physical constraints
Depth (D)
A general volume factor
Freeboard (F)
Sufficient freeboard is essential for stability
Selection methods for main dimensions
Based on a reference ship
Based on statistical data
Based on direct calculations
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