os-c102_2012-10 DNV海洋结构物设计规范 Structural Design of Offshore Ships

• Sec.5 Hull Strength — C400: Design loading conditions for the hull girder longitudinal strength for the survival condition. Table D1 moved from Sec.11 and Sec.12. — E: Local detail stress analysis. Tables modified and moved from Sec.11 and Sec.12. — F: fatigue strength moved to Sec.8. • — — — Sec.6 Strength of Topside Structures F: Global dynamic loads for topside structure is modified and combination tables moved to Sec.4 C800. H: Table H1 modified. Coefficient for global strength for topside load bearing set to 1.0. Old G “Hull Deformation” moved to F200 and item F205 regarding sliding supports has been added.
OFFSHORE STANDARD
DNV-OS-C102
Structural Design of Offshore Ships
OCTOBER 2012
The electronic pdf version of this document found through is the officially binding version
Main Changes
• — — — • — — — — — • — — — — — • — — — General LRFD method is moved from App.B to a new section, Sec.13. New App.B for life time extension of FPSOs. Editorial modifications and some figures included. Sec.2 Material Selection and Inspection Principles B105: Guidance note regarding doubling plates added. B203: Service temperature. Changed distance from 0.5 to 0.6 m for interference from external structure. Table B1: Foundation attached to decks included. B405: regarding steel grade above minimum required added. C305: A guidance note for definition of critical details added. Sec.3 Design Principles Table B2 “Design basis for wave load analysis for ultimate strength” (old B1) modified. Table B3 “Design basis for wave load analysis for fatigue strength” (old B2) modified. B600: New benign water requirement included and moved from Sec.11 and Sec.12. Old B500: Extreme condition removed and requirements changed. See B403. C400: Usage factor for fine mesh FE analysis moved from Sec.5. Sec.4 Design Loads C300: Wind loads modified. C800: Combination of loads for topside and topside interface modified and moved from Sec.6. C900: Minimum tank densities for the strength and fatigue analysis included.
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• Sec.7 Topside Interface to hull structure — B400: (old C.) Combination of loads modified. • Sec.8 Fatigue Capacity Assessment — F: Fatigue sensitive details in the hull and topside supporting structures moved from Sec.11 and Sec.12. — G: FMS notation requirements included. • — — — Sec.12 Additional Provisions for Floating Production, Storage and Offloading Units C200: Green sea load. Hs min changed from 8.m to 10 m. D200: Quay requirement deviation given. Table H2 modified. Design fatigue factors (DFFs).
Offshore Standard DNV-OS-C102, October 2012 Changes – Page 4
• App.A Conversion of Tanllation — A200 Benign waters. Reduction of the rule wave loads in benign waters by reducing the rule wave coefficient (Cw). • App.B Longitudinal Strength according to the LRFD Method — New. Life time extension of FPSOs.
• Sec.13 LRFD Method — New section - LRFD format moved from old App.B. — C: Global strength analysis of the topside structure included.
DET NORSKE VERITAS AS
Offshore Standard DNV-OS-C102, October 2012 Changes – Page 3
CHANGES
General
This document supersedes DNV-OS-C102, October 2011. Text affected by the main changes in this edition is highlighted in red colour. However, if the changes involve a whole chapter, section or sub-section, normally only the title will be in red colour.
DET NORSKE VERITAS AS
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