Worked example 1: Deadweight carrier Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Worked example 1: Deadweight carrier Using the data in Figures (optimum block coefficient and general range of principal dimensions) and in Table (typical mass group percentage) provided in the following slides, estimate the principal dimensions of a general cargo ship of 14,500 tonnes deadweight and 14 knots service speed.
Figure A: Optimum block coefficient Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Figure A: Optimum block coefficient
Figure C: General Ranges of principal dimensions Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Figure C: General Ranges of principal dimensions
Table A: Typical mass group percentage Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Table A: Typical mass group percentage
Solution Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Solution
Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Solution (contd.)
Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Comments on solution If you are not so fortunate with your first choice then select two further values of CB and corresponding Fn from the figures; then find the dimensions and displacement of your two additional trial ships as above. Then plot displacement against Length and pick off the Length which gives the desired displacement. and so the correct CB can be read from Figure A and a check made on displacement. Alternatively, displacement may be plotted against CB, in a similar way to the plot against Length shown above, and the design value found.
Worked example 2: Deadweight carrier Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Worked example 2: Deadweight carrier Estimate the dimensions of a dry cargo ship of 13,000 tonnes deadweight at a maximum draught of 8 metres and with a service speed of 15 knots.
Solution Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Solution
Department of Naval Architecture & Marine Engineering Bangladesh University of Engineering & Technology, Dhaka-1000 Solution (contd.)