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Structures and Safety Reliability

Probabilistic Presentation of the Still Water Loads of Tankers. Which Way Ahead?

[+] Author and Article Information
Lyuben D. Ivanov, Ge Wang

Corporate Technology, American Bureau of Shipping, Houston, TX 77060

J. Offshore Mech. Arct. Eng 133(3), 031604 (Apr 01, 2011) (10 pages) doi:10.1115/1.4001959 History: Received August 05, 2009; Revised April 29, 2010; Published April 01, 2011; Online April 01, 2011

This paper analyzes the state-of-the-art concerning this subject. The objectives are (1) to provide data of still water bending moments and shear forces that were collected from loading manuals of dozens of tankers, (2) to conduct statistical analysis of the loading cases, and (3) to discuss possible ways for further improvement of knowledge about the variability of still water loads during real ships’ operation.

Copyright © 2011 by American Society of Mechanical Engineers
Topics: Stress , Ships , Water , Tankers
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References

Figures

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Figure 1

Positive shear forces for 121 full load conditions of tankers with DW<150 K DWT

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Figure 2

Negative shear forces for 114 full load conditions of tankers with DW<150 K DWT

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Figure 3

Hogging bending moments for 42 full load conditions of tankers with DW<150 K DWT

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Figure 4

Sagging bending moments for 105 full load conditions of tankers with DW<150 K DWT

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Figure 5

Positive shear forces for 145 ballast conditions of tankers with DW<150 K DWT

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Figure 6

Negative shear forces for 41 ballast conditions of tankers with DW<150 K DWT

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Figure 7

Hogging bending moments for 39 ballast conditions of tankers with DW<150 K DWT

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Figure 8

Sagging bending moments for 8 ballast conditions of tankers with DW<150 K DWT

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Figure 10

Negative shear forces for 321 partial load conditions of tankers with DW<150 K DWT

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Figure 11

Hogging bending moments for 232 partial load conditions of tankers with DW<150 K DWT

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Figure 12

Sagging bending moments for 129 partial load conditions of tankers with DW<150 K DWT

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Figure 13

Positive shear forces for 89 full load conditions of tankers with DW=150–300 K DWT

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Figure 14

Negative shear forces for 89 full load conditions of tankers with DW=150–300 K DWT

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Figure 15

Hogging bending moments for 35 full load conditions of tankers with DW=150–300 K DWT

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Figure 16

Sagging bending moments for 56 full load conditions of tankers with deadweight 150–300K DWT

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Figure 17

Positive shear forces for 28 ballast conditions of tankers with deadweight 150–300K DWT

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Figure 18

Negative shear forces for 28 ballast conditions of tankers with deadweight 150–300K DWT

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Figure 19

Hogging bending moments for 19 ballast conditions of tankers with deadweight 150–300K DWT

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Figure 21

Positive shear forces for 142 partial load conditions of tankers with deadweight 150–300K DWT

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Figure 22

Negative shear forces for 142 partial load conditions of tankers with deadweight 150–300K DWT

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Figure 25

Positive shear forces for 32 full load conditions of tankers with DW>300 K DWT

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Figure 26

Negative shear forces for 32 full load conditions of tankers with DW>300 K DWT

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Figure 27

Sagging bending moments for 32 full load conditions of tankers with DW>300 K DWT

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Figure 28

Positive shear forces for 13 ballast conditions of tankers with DW>300 K DWT

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Figure 29

Negative shear forces for 13 ballast conditions of tankers with DW>300 K DWT

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Figure 30

Hogging bending moments for 13 ballast conditions of tankers with DW>300 K DWT

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Figure 34

Sagging bending moments for 44 partial load conditions of tankers with DW>300 K DWT

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Figure 33

Hogging bending moments for 58 partial load conditions of tankers with DW>300 K DWT

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Figure 32

Negative shear forces for 102 partial load conditions of tankers with DW>300 K DWT

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Figure 24

Sagging bending moments for 61 partial load conditions of tankers with deadweight 150–300K DWT

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Figure 23

Hogging bending moments for 101 partial load conditions of tankers with deadweight 150–300K DWT

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Figure 31

Positive shear forces for 101 partial load conditions of tankers with DW>300 K DWT

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Figure 20

Sagging bending moments for 13 ballast conditions of tankers with deadweight 150–300K DWT

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Figure 9

Positive shear forces for 291 partial load conditions of tankers with DW<150 K DWT

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