Trans RINA, Vol 157, Part C1, Intl J Marine Design, Jan –Dec 2015


The following 7 loading conditions were examined: ba


allast departure; ballast arrive; full load departure; full load arrive; full load mid voyage; full load mid voyage and first launch of M02 vessel; full load mid voyage and fourth launch of M02 vessel. The design was developed with the following constraints:


 


 The The ship must not be tri m by bow


The difference between the immersions of bow and stern should be less than 1% of the length of the ship (1.29m);


The immersion at the stern must be greater than 4 to ensure the complete immersion of the propellers.


still water bending moment 4m, and shear force


calculations are shown in Figure 6 and Table 1, from which the structural scantlings were calculated using Lloyd's Rules calculator. The structural plans are shown in Figure 7.


Longitudinal Strength 0.0a


Weight x 4.0 Pt Load x .2 Buoy. x 4.0 Shear x 20.0 B.M. x 700.0


<---Aft (Meters) Fwd---> 50.0f


100.0f 100.0 18.00 50.0 20.00 0.0 22.00 -50.0 24.00 -100.0


F igure 6: Still water bending moment and shear force calculation


The intact stability righting arm curve is shown in Figure 7 with values in Table 2. Intact stability weather criterion is shown in Table 3 with the righting arm curve in Figure 8.


1674.61 2109.57 1842.07 2320.53 Table 4: Holtrop's power prediction 20846.34 28648.29 1107.57 1218.33 12534.19 711.19 782.31 7243.58 12.00 14.00 16.00 245.76 343.65 491.14 270.34 378.01 540.26 1668.75 2722.30 4446.54


selected, namely two ABB A preliminary electrical load anally


Azipod CO1250. The ysis is shown in Table 5


supported the selection of four 3300kw generators as prime movers for the vessel (Catterpillar C280-12).


V [knots] 6.00 8.00 10.00 Rto [kNt k ] 68.12 115.36 173.47 Rtot S.M.[kN] 74.93 126.90 190.82 Pe S.M.[kW] 231.27 522.21 981.56


Figure 9: Holtrop’s power predic


Navigatio [kW]


Holtrop’s power prediction method was used to estimate the power requirement as shown in Table 4 and Figure 9. To achieve the required hull power requirement for the hull speed of 16Knots a pod propulsion system was


Base Load Max Load


7919.16 9746.31


n


ction method


Operation [kW]


1243.47 4433.69


Emergency [kW]


r


285.1 386.6


Table 5: Preliminary electric load analysis


7 1


C-88


© 2015: The Royal Instittu


ution of Naval Architects


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210