Trans RINA, Vol 153, Part A4, Intl J Maritime Eng, Oct-Dec 2011
Table 5 Double Bottom Height – Spacing of floors and girders of the “as designed” bulk carrier compared to the values produced by the FEA, “IACS CSR” and “Proposed Formulation”.
Items considered DB Height Values of
“As Designed” (mm)
Values as calculated by FE (mm)
IACS CSR
1680 >>1900 whichever is lesser B/20 or 2 m
Spacing of DB Floors
Spacing of DB Girders
2580 2580 (Frame Sp. 860) 4050 3240 (Sp.of longs 810) 10. ACKNOWLEDGEMENTS
This work was performed under the direction of and with the assistance of Mr D. J. Fafalios of Fafalios Shipping S.A., and supported by Intercargo.
11. 1.
REFERENCES IACS UR Z11.2.2, “Unified Requirements concerning Survey and Certification”.
2. IACS CSR (Common Structural Rules) For Bulk Carriers.
3. ABS Rules For Building And Classing Steel Vessels, 1991 (pre-SafeHull).
4. DNV Rules For The Construction Classification Of Steel Ships, 1973.
5. ABS Rules For Building And Classing Steel Vessels - 2000 – Part 5 (Special Vessels Type), Safehull.
6. HADI K.K. AMLASHI, TORGEIR MOAN – “Ultimate Strength analysis of bulk carrier hull under alternate hold loading – Part 1: Nonlinear finite element modeling and ultimate hull girder strength capacity”.
7. CHITOSHI MIKI, Tokyo University, “Local (structure) stress based fatigue Design”.
8. UK Health And Safety Executive, “Offshore Installation: Guidance on Design Construction and certification”
9. SOLAS Ch. II-1 Reg 3-6, “Performance Standard of Protective Coatings for Ballast Tanks”
10. PETER D. CONTRAROS, ABS Paper on: Domino
Effect – Coating Breakdown -
Corrosion Structural Failure Leading to Possible Design Ramifications.– Lloyds List Event –
And
whichever is lesser 3.5 m
or 4 frames spacing
whichever is lesser 4.6 m
or 5 spacing of longs Prevention 4050
IACS CSR Requirements (mm)
1610
Proposed Formulations
dDB = 45BDB+80√d + (L+240)
3240
whichever is lesser 3.0 m
or 3 frames spacing
whichever is lesser 3.0 m
or 4 spacing of longs
and Management Corrosion - April 2003
11. ABS Guidance Notes (Peter D. Contraros Consultant to ABS - contributor) on “Inspection Maintenance and Application of Marine Coating Systems”. 2007 (Chapter 13)
12. PETER D. CONTRAROS, ABS Paper on “Diagnostics of Coating Breakdown in Ballast Tanks – Testing Assessment Prevention (TAP)”, Protective Coatings Conference in November 2004
Oslo,
13. SMITH CS., “Influence of local compressive failure on ultimate longitudinal strength of a ship’s hull”, Trans. PRADS 1977:73-9
14. A KAWAMURA, D SAKAI, K HASHIMOTO, M SONDA, Y OHIYAMA, Y KURAMOTO. "Full scale measurements and strength analysis of 60000 DWT bulk carrier” (in Japanese), Journal
of Seibu (West) Society of Naval Architects of Japan, 1974, pp. 159-172
15. K HAGIWARA, T NAWATA, S WATANABE, H MATSUMAE, “Structural strength of large bulk carriers”, Mitsubishi Heavy Industry, vol. 7, No. 1, 1970, pp. 43-51
16. Marine Accident Investigation Branch (MAIB) of UK Report No. 9/2008 – April 2008 – Report on the Investigation of Structural Failure of “MSC Napoli” English Channel – i.e. Page 18 of the report states “A report on the “3-D Stress Analysis of the hold Structure .. The analysis covers the central cargo hold region (frames 156 to 202) in No. 4 and 5 hold; it did not consider the structure in way of the engine room….”
3000
Proposed Formulation (mm)
1772
2580
of Marine
©2011: The Royal Institution of Naval Architects
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