BANGLADESH UNIVERSITY OF ENGINEERING & TECHNOLOGY NAME 338 SHIP DESIGN PROJECT & PRESENTATION-1 DATE-26 AUG,2010
DESIGN OF WATER TAXI
Khabirul Haque Chowdhury
Department of NAME, BUET.
Hasib Ul Haque (0712014)
Ahmad Shibli Saleheen (0712018)
Our first presentation on this project includes :
Preliminary lightweight, deadweight and displacement
Preliminary lines plan
Preliminary hydrostatic calculation
Ship type: Water Taxi
Capacity: 95 Passenger
Speed: 14 knots
Route: Sadarghat-Ashulia (29.5km)
To take advantage of Dhaka city’s circular waterway
To ease the water way communication with comfortable service
To reduce the pressure on land transport.
To safe people from horrible traffic jam
To establish a modern transport system which is more safe, affordable, technologically dependable, environment friendly, and acceptable to all citizens of the country
Inland Water Transport Network by Category Class Indicated Draft Length in Km. Classification criteria I 3.6 meter 683 at least 3.6 m required to maintain round the year. II 2.1 meter 1000 major inland ports or place of economic importance to class I routes. III 1.5 meter 1885 seasonal in nature IV <1.5 meter 2400 in dry season no navigability Total 5968
Circular Waterways around Dhaka
Total Length-110 km.
Sadarghat to Ashulia (30 km);
Dredging: 17.44 lakh m 3 .
To be Completed:
Ashulia to Kanchpur (40 km);
Dredging: 34.73 lakh m 3 .
Sadarghat Ashulia Kanchpur
GENERAL PARTICULARS 25.79 m WATER TAXI
Classification Society: GL
Type: Small passenger vessel
Information of basis ship MV TURAG & MV BURIGANGA
Displacement 17.7 T
C b 0.60
DETERMINATION OF PRINCIPAL PARTICULARS
LOA/LBP = 1.05
LBP/B = 3.87
B/T = 4.20
D/T = 1.73
C b = 0.6
C d = 0.35
LBP 25.79/LBP =1.05 = 24.4 m Breadth (B) 24.4/B= 3.87 = 6.30 m Draft (T) 6.30/T = 4.20 = 1.5 m Depth (D) D/1.5= 1.73 = 2.6 m
Length Overall 25.79meter
LBP 24.4 meter
Breadth (moulded) 6.3 meter
Depth 2.6 meter
Max. Draught(moulded) 1.5 meter
(at full load)
DEADWEIGHT (DWT) CALCULATION :
No of Person on board: No of passenger = 95 No of crew = 4 Total = 99 Weight Allowance per person: Weight per person = 75 kg Fresh water per person = 1 liter Luggage = 5 kg Total = 81kg Fuel needed per voyage : 500 liter Store + Allowance : 1000 kg Total Weight : (95*81) + (500*.80) + 1000 = 32.495 tonnes Cargo: (95*5)=0.475 tonnes Allowance : 10 tonnes Deadweight : Total weight + Cargo+Allowance = (32.495+.475+10)=42.97tonnes
In our lines plane we take total 11 Station. Multiplying the half ordinate of each station with the multipliers used in simpson’s first rule we find total product for area. Then,
Water plane area = 2 X h L /3 X total Product for area
In our lines plane we take total 4 water lines. After finding different water plane area
we use 5,8,-1 rule, simpson,s first rule & simpson’s second rule to find volume up to different water line. As our ship is an Inland waterways ship so Displacement is equals to volume.
Volume up to water line 1 = 1/12 X h v X Total Product for volume (By using 5,8,-1 rule).
Volume up to water line 2 = 1/3 X h v X Total Product for volume
(Using Simpson’s First rule).
Volume up to water line 3 = 3/8 X h v X Total Product for volume
(Using Simpson’s Second rule).
Volume up to water line 4 = 1/3 X h v X Total Product for volume
Formula Used in Hydrostatic Calculation: Positions of Center of Buoyancy above keel ( KB ) : KB = Moment of Volume Displacement above base / Volume up to corresponding waterline Positions of Longitudinal Metacenter (BM L ) : BM L = Moment of Inertia about center of flotation ( I L ) / Displacement of volume Moment to Change trim 1m ( MCT 1m ) : MCT 1m = (I L X Displacement in ton ) / (L BP X Displacement in volume) Positions of Transverse Metacenter (BM T ) : BM T = Transverse Moment of Inertia / Moment of Volume.
Formula Used in Hydrostatic Calculation: Block Coefficient (C B ): C B = Displacement in Volume / (L BP X B X draught at corresponding water plane.) Midship Area Coefficient (C m ) : C m = Midship Section Area / (B X draught at corresponding water plane.) Prismatic Coefficient (C p ) : C p = C B / C m Water plane Coefficient (C w ) : C w = Water plane Area / (B X L at corresponding water plane.)