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FULL SCALE MEASUREMENT RESULTS FOR A CAPEZIZE BULK CARRIER

Ship data:

Length overall: Loa = 290.000 m Length between perp,: Lpp = 282.400 m Breadth mld.: B = 45.400 m Depth mld.: D = 23.800 m Draught (max.): T = 17.552 m Deadweight: DWT = 170700 tonnes Height double bottom: hdb = 2.7 m Section modulus deck: ZDL = 42.358 m3 Section modulus 0.1 m below inner btm.: Z2.6 = 63.115 m3 Section modulus 0.2 m abv. bottom: Z0,2 = 49.236 m3 Section modulus bottom: ZBL = 48.350 m3

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Location of sensors:

3

4

5

6

7

Recording made 20 min per hour and date processed/recorded.

Standard deviation of measured longitudinal strain range in deck #192, 22.45 m off CL (P), sensor no. 29. Below is shown time series for period no. 2162 and frequency for this 20 min period.

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Strain measurements

Location Standard deviation, μS Period no.

921 Partly loaded

(Coal)

Period no. ~1870

Ballasted

Period no. 2162

Fully loaded (Coal)

Longitudinal strain - deck line, #192 (P), Pos. 29 42 (40) 83 (85) 91 (90) Longitudinal strain - deck line, #192 (S), Pos. 30 37 (40) 87 (85) 90 (90) Longitudinal strain btm.– DB gir. No 5, #180 (P), Pos. 9 22 (34) 60 (73) 54 (77) Longitudinal strain inner btm.– DB gir. No 5, #180 (P), Pos. 10

19 (27) 45 (57) 46 (60)

Longitudinal strain btm. DB gir. No 20, #180 (P), Pos. 12 27 (34) 81 (73) 77 (77) Longitudinal strain btm.– DB gir. No 20, #180 (S), Pos. 13

31 (34) 54 (73) 60 (77)

Longitudinal strain btm.– DB gir. No 5, #192 (P), Pos. 16 27 (34) 69 (73) 63 (77) Longitudinal strain btm.– DB gir. No 5, #162 (P), Pos. 1 21 (34) 60 (73) 57 (77) Longitudinal strain inner btm.– DB gir. No 5, #162 (P), Pos. 2

18 (27) 44 (57) 41 (60)

Transverse strain inner btm.– DB floor at BL 5, #192 (P), Pos. 18

3.1 7 8.4

Note: Values in brackets are estimated hull girder strain range based on average results at upper deck, average of Pos. 29 and 30.

Conclusion:

• Little DB bending. Except for margin girder all longitudinal strain ranges (typical strain range will be 4-5 timed the standard deviation) are well below the estimated hull girder strain range based on measurements at upper deck. Please also note that the strain ranges at DB floor is very low.

• The difference between P and S margin girder indicate that it is some warping effect present. • From these measurements it might be considered to reduce the dynamic loads from dry bulk

cargo, e.g. use the 50% reduction factor not only for fatigue as adopted by CSR-H but also for the 10-8 dynamic loads used in the yield and buckling assessment, e.g. local strength, prescriptive requirements and FE assessment.