Download - RO-PAX FERRY
RO-PAX FERRY
Gabriel, Shaun, Timothy
April 28th, 2016
Introduction
ROPAX Ferry Concept Design for WFSA competition
Low-cost vessel for service between the islands of Indonesia
All others42%
Bangladesh25%
Indonesia16%
Philippines11%
China6%
Causes and Circumstances of Major Ferry Accidents, 2000-2014, by Abigail Golden, Worldwide Ferry Safety Association.
Ferry Accidents
Pelni - Wikipedia, the free encyclopedia. (n.d.). Retrieved January 22, 2016, from https://en.wikipedia.org/wiki/Pelni
Location
Basic Requirements
• 14 to 18 knots
• Maximum 185 passengers
• Maximize car and truck payload
• 20 Cabins
• Range of 1000 Nm
• Affordable to construct and operate
ROPAX ferry 2007http://indahnesia.com/indonesia/event/45/ferry_sinks_off_java_coast.php
Safety• Overloading• Fire Safety
Affordability
Indonesian Ferries | Paul's Travel Blog. (n.d.). Retrieved from http://www.paulstravelblog.com/wp/?p=260
Challenges:
Overloading
Fire
Affordability
• Catamaran design
• Limited number of trucks
• Well ventilated car deck
• Engines on deck
• Fire zones
• Catamaran (more deck area)
• Steel construction
• Ease of maintenance
• Built in Indonesia
Problems: Solutions:
Parent Ship: North Island Princess
Hull Form
• Waterline Length: 52.5 m
• Displacement: 1025 tonnes
• Based on NPL, VWS 89
• Design speed of 15 knots
VWS 89
NPL
Savu Ferry
Catamaran Hull Form
• L/V^(1/3) = 6.67
• Cp = 0.6
• Cb = 0.5
• BOA = 23.5m
• LOA = 55m
• LCB = -6.5% midships
• Single Chine
Stability
• SOLAS
• IS 2008
• General Criteria for 4 conditions:• Fully loaded arrival/departure
• Unloaded arrival/departure
• Wind Criteria
Intact Stability Results
Stability Criteria - IS 2008, Open Water Criteria for Fully loaded departure
Name Angle 1 Angle 2 Required Actual Pass / Fail
GM At 0 > 0.15 meters 0 0.15 39.4 Pass
GZ At 30 >= 0.2 meters 30 0.2 6.3 Pass
Angle At GZmax > 25 deg 14.5 25 14.5 Fail
Area Between 0 and 30 > 3.15 meters-
deg
0 30 3.15 175.3 Pass
Area Between 0 and Flood > 5.15
meters-deg
0 22.7 5.15 126.3 Pass
Area Between 30 and 40 > 1.72 meters-
deg
30 40 1.72 57.8 Pass
-8.0
-6.0
-4.0
-2.0
0.0
2.0
4.0
6.0
8.0
-20 -15 -10 -5 0 5 10 15 20 25 30 35 40
GZ
(m)
Angle of Heel (Degrees)
Righting Arm Curve
Damaged Stability
• Lost Buoyancy Method
Damaged Stability Results
Freeboard At FreeEquil >= 0.076 meters 3.3 0.1 1.8 Pass
Angle At FreeEquil <= 12 deg 3.3 12.0 3.3 Pass
GZ At GZmax >= 0.29 meters 21.6 0.3 6.1 Pass
Area Between FreeEquil and 27 >= 0.86
meters-deg3.3 27 0.9 107.3 Pass
Angle Between FreeEquil and GZ0 >=
15 deg3.3 74.9 15.0 71.5 Pass
Name Angle 1 Angle 2 Required Actual Pass / Fail
Stability Criteria - SOLAS 2004, After Damage, compartments C and D flooded
Resistance and Powering
• NPL• Model testing• Round bilge, displacement
• VWS 89• Model testing• Chined, planing
• Pham and Sahoo• Regression Analysis• Chined
• Engines selected based on:• 1500 kW Effective Power
Transport Factor: Reality Check
0
10
20
30
40
50
60
5 10 15 20 25 30 35 40
Tran
spo
rtat
ion
Fac
tor
Speed (kn)
Transportation Factor for Similar Ferries (ROPAX Catamarans)
Ship Arrangement
• Capacity, flow, and passenger safety
• Mission requirements for each deck• Cars/trucks
• Stairwells, access
• Accommodations
• Service spaces
• Seating
• WC’s
Profile
Inboard Profile
Midship
Main Deck
Deck 2
Deck 3
Machinery Arrangement
Structure: Design Methodology
Hydrostatic, Hydrodynamicpressure etc.
Material Selection
Local Design Pressure
Local Members(plating&stiffener)
Global LoadsHull Girder
Strength
• Lloyd’s Register Rules and Regulations for Classification of Special Service Craft
Structure: Local Design Pressures
Design Pressure kPa
bottom shell plating 113.23bottom shell stiffening 56.61side shell plating, outboard 113.23side shell stiffening, outboard 56.61side shell plating, inboard 113.23side shell stiffening, inboard 56.61cross-deck plating 83.68cross-deck stiffening 41.84weather deck plating 25.16weather deck stiffening 25.16interior deck plating 25.16interior deck stiffening 25.16inner bottom plating 88.68inner bottom stiffening 56.61superstructure plating 7.39superstructure stiffening 3.69bulkhead plating 28.25bulkhead stiffener 35.21
hydrostatic pressure 28.14
hydrodynamic pressure 57.66
pitching pressure 79.70
Impact pressure 64.74
deckhouse, superstructure pressure 7.04
shell envelope pressure 107.84
forebody impact pressure 64.74
Impact pressure on cross-deck 22.76
pressure on weather deck 12.40
deck pressure for cargo 25.16
watertight bulkhead, plating 28.25
watertight bulkhead, stiffener 35.21
Wave Pressure/Impact Pressure Local Member Design Pressure
Structure: Local Plating ThicknessMinimum thickness Design selection
Shell envelopebottom shell plating 9.9 10side shell plating 9.9 10wet-deck plating 8.5 10
Single Bottom structurecentre girder web 6.7 8.0floor webs 5.1 8.0side girder webs 6.1 8.0
Bulkheadswatertight bulkhead plating 4.8 5
Deck platingstrength/main deck plating 8.5 10
lower deck/inside deckhouse 5.2 10
Superstructures and deckhouses
superstructure side plating 3.1 5
superstructure top plating 3.0 5
machinery casing side plating 3.0 5Pillars
rectangular pillars 5.0 5
Structure: Global Loads
Twin-hull Transverse Bending Moment Twin-hull Torsional Moment
Twin hull
transverse
bending moment
26,184 kNm
Twin hull torsional
connecting
moment
40,389 kNm
Vertical Wave Bending Moment
Head sea
Beam sea
Quartering sea
total directbending stress 32.8 50.6 61.6total shear stress 2.5 8.2 21.4
Structure: Hull Girder Strength
Hull Longitudinal Bending Strength Hull Shear Strength
Hull Girder Bending Stress
Deck Keel
24.1 51.9
max permissible hull vertical bending
stress, MPa
169
Demand Capacity
max permissible mean shear stress,
MPa
98
Hull Girder Shear stress, MPa
5.7
Strength of Cross-deck StructureCross-deck
max permissible vertical bending stress 169max permissible mean shear stress 98
< <
<
Structure: Midship Section
Frame
spacing 550 mm
Max. web
frame
spacing
3.3m
Propulsion: Pairwise Comparison
Propulsion: Selection
Propulsion: Unit
4 X Schottel Outboard units
CAT ACERT 32746 kW each
Weight Engineering
Light Ship Summary Weight
(MT) LCG VCG TCG L.Mom V.Mom T.Mom
100 - Structure 434.1 30.1 5.6 0.0 13072678 2418781 0
200 - Propulsion 74.3 52.9 7.9 0.0 3929600 588100 0
300 - Electrical 31.0 34.2 6.8 0.0 1059600 209223 0
400 - Command 3.4 21.9 13.9 0.0 74325 47275 0
500 - Aux Equipment 44.8 24.5 8.4 0.0 1097640 374820 0
600 - Outfit 52.2 32.0 7.1 0.2 1668768 370710 9944
MARGIN (5%) 32.0
671.7 31.1 6.0 0.0 20903 4009 9.944
Outfitting estimatesOutfitting weights QTY Length, m height, m kg/U t/m2 Weight, t
Cabin floor 0.0335 6.85
ceilings 0.007 1.43
Corridor floor 0.0335 4.22
ceilings 0.007 0.88
Bathroom floor 0.0335 1.00
ceilings 0.007 0.21
Balcony floor weight 0.0335 0.89
Non structural bulkheads 193.5 2.75 0.01 5.32
Interior Stairs 12 50 0.60
Interior Railings 30.8 10 0.31
Interior doors 20 50 1.00
Exterior doors (to balconies) 8 130 1.04
Bunk Beds 56 50 2.80
Vanity unit 20 25 0.50
Chair + desk 20 20 0.40
Toilet Stalls 4 40 0.16
Bathroom washbasin 4 25 0.10
Showers 4 25 0.10
Total PAX accomodation outfit weight TONNES: 27.8
Full Load SummaryFull Load Displacement Summary Weight
(MT) LCG VCG TCG L.Mom V.Mom T.Mom
Consumables
Fuel (98%) 39 32 2 0 1258 64 0
Potable Water (98%) 20 26 2 8 500 32 162
Passengers, Crew, and Stores
Passengers + Crew 12 25 11 0 300 131 0
Crew Stores (15 crew) 1 23 4 -7 17 3 -5
Passenger stores (185 pax) 3 31 10 0 85 26 0
Misc. Liquids
Grey Water (10%) 2 24 2 0 37 3 0
Black Water (10%) 1 23 2 10 14 1 6
Lube Oil (98%) 2 38 2 0 69 4 0
Used Oil (10%) 0 38 2 0 2 0 0
Sludge (10%) 0 39 2 0 4 0 0
Oily Water (10%) 1 38 2 0 19 1 0
Mission Load
Cars, x 34 58 25 7 0 1457 376 0
Trucks (Fully loaded) x 10 200 28 7 0 5560 1320 0
Total Deadweight 337 28 6 0 9321 1962 163
Lightship Weight 671.7 31.1 6.0 0.0 20902.6 4008.9 9.9
LCG VCG TCG
Estimated FULL LOAD DISPLACEMENT 1008.3 30.0 5.9 0.2 30223 5971 173
Cost: Shipyard’s Perspective
Is it affordable?
Cost: Cash Flow Analysis
Appendix