Transcript Ship Drawing II

Ship Drawing
Lines Plan of Different Ship Types
Ship Types & Hull Forms

Ships can be Classified by their usage into:
1. Merchant Ships
2. Ferries
3. Service Ships (Tugs)
4. War Ships
5. Luxury and fun Boats
Ship Types & Hull Forms

Marine Vessels can be Classified by their support
into:
1. Aerostatic Support
(Hover Crafts)
2. Hydrodynamic Support
( Hydrofoils – Planning
Hulls)
3. Hydrostatic Support
( SWATH – Catamaran –
Ships – Submarines)
Ship Axis
z



The x-axis is the length of the ship, from which
stations are measured.
The y-axis is the width of the ship, from which
buttocks are measured.
The z-axis is the height of the ship, from which
water planes are measured.
y
The origin is the
intersection of
Keel – C.L. – A.P.
x
Ship Hull Form and Geometry
• Since the ship is a 3-dimensional shape, data in x, y
and z directions is necessary to represent the ship hull.
Table of Offsets
• Lines
- body plan (front View)
- shear plan (side view)
- half breadth plan (top view)
Figure 2.2 - The Projection of Lines onto 3 Orthogonal Planes
Half – Breadth Plan

Intersection of planes (waterlines) parallel to the
baseline (keel).
Figure 2.3 - The Half-Breadth Plan
Shear Plan

Intersection of planes (buttock lines) parallel
to the centerline plan
Figure 2.4 - The Sheer Plan
Body Plan

Intersection of planes to define section line.
Figure 2.6 - The Body Plan
Basic Dimensions and Hull Form Characteristics
AP
FP
Shear
DWL
LBP
LOA
• LOA(length over all ) : overall length of the vessel
• DWL(design waterline) : water line where the ship is designed to
float
• FP(forward perpendicular) : imaginary vertical line where the bow
intersects the DWL
• AP(aft perpendicular) : imaginary vertical line located at either
the rudder stock or intersection of the stern with DWL
Basic Dimensions and Hull Form Characteristics
AP
FP
Shear
DWL
LBP
LOA
• LBP (length between perpendicular) : horizontal distance
from FP and AP
• Amidships : the point midway between FP and AP
• Shear : longitudinal curvature given to deck
View of Mid-Ship section
WL
Beam: B
Camber
Freeboard
Depth: D
Draft: T
K
CL
• Depth(D): vertical distance measured from keel to deck taken at
amidships and deck edge in case the ship is cambered on the deck.
• Draft(T) : vertical distance from keel to the water surface
• Beam(B) : transverse distance across the each section
Breadth(B) : transverse distance measured amidships
View of Mid-Ship section
Beam: B
Camber
Freeboard
WL
Depth: D
Draft: T
K
CL
• Freeboard : distance from depth to draft (reserve buoyancy)
• Keel(K) : locate the bottom of the ship
• Camber : transverse curvature given to deck
Flare
Tumblehome
• Flare : outward curvature of ship’s hull surface above the waterline
• Tumble Home : opposite of flare
Drawing
Ship
Lines
Drawing
Lines
Plan
Non – Dimensional Offset Table
WL 0
A.P.
ST 1
ST 2
ST 3
ST 4
ST 5
ST 6
ST 7
ST 8
ST 9
AMIDSHIP
ST 11
ST 12
ST 13
ST 14
ST 15
ST 16
ST 17
ST 18
ST 19
F.P.
Stern
Bow
0
0.024473
0.047224
0.111401
0.191471
0.255004
0.374238
0.501305
0.62074
0.693464
0.672472
0.591819
0.437772
0.308964
0.195822
0.104439
0.055614
0.038033
0.010009
0
0
WL 0.5
WL 1
WL 2
WL 3
WL 4
0
0.065013
0.134639
0.217755
0.312359
0.436815
0.56745
0.708181
0.820366
0.876545
0.852742
0.785292
0.683464
0.553351
0.433159
0.316536
0.204352
0.129591
0.066144
0
0
0
0.072933
0.16275
0.27537
0.403046
0.549608
0.696084
0.82376
0.915057
0.949521
0.939164
0.897737
0.827763
0.720453
0.601218
0.46423
0.325587
0.206876
0.112533
0.037598
0
0
0.072933
0.191558
0.342994
0.519321
0.681114
0.814534
0.920017
0.97624
1
0.991558
0.97537
0.919234
0.83342
0.720104
0.596345
0.450653
0.311488
0.180592
0.075022
0
0
0.086684
0.242907
0.429417
0.609748
0.762663
0.875631
0.952654
0.987728
1
1
0.990513
0.947433
0.871105
0.76832
0.640383
0.498433
0.35074
0.214708
0.095997
0
0
0.170409
0.369017
0.556049
0.712359
0.836466
0.916884
0.971192
1
1
1
0.990513
0.949695
0.889817
0.788686
0.664926
0.526458
0.379634
0.237337
0.110966
0
WL 0
WL 0.5
WL 1
WL 2
WL 3
WL 4
0.015936 0.01753 0.019124 0.021514 0.019124 0.010359
0.900398 0.938247 0.959363 0.98008 0.988048 0.994024
WL 5
0.143777
0.367972
0.548477
0.694691
0.807746
0.895387
0.948564
0.990513
1
1
1
0.992602
0.958747
0.898782
0.804439
0.687119
0.549608
0.405831
0.25866
0.130722
0
WL 6
0.328895
0.545692
0.700261
0.807137
0.88503
0.941253
0.974326
1
1
1
1
0.992602
0.963795
0.907137
0.827937
0.708007
0.582855
0.440905
0.296258
0.156658
0.030983
WL 7
0.461358
0.667276
0.798085
0.884769
0.944299
0.975457
0.988773
1
1
1
1
0.992602
0.975283
0.927154
0.859182
0.759617
0.633507
0.502872
0.35074
0.203481
0.060226
WL 8
0.55718
0.735683
0.853612
0.928111
0.975022
0.993037
1
1
1
1
1
1
0.989121
0.956397
0.905657
0.827676
0.714186
0.589382
0.436466
0.267624
0.104961
WL 9
0.620801
0.763795
0.881984
0.950653
0.989991
1
1
1
1
1
1
1
1
1
0.973281
0.925587
0.840209
0.707659
0.561793
0.364839
0.164839
WL 5
WL 6
WL 7
WL 8
WL 9
-0.0247 -0.03904 -0.04303 -0.04701 -0.04861
1 1.005976 1.011315 1.018327 1.026295