DNV OS C102 PDF

DNV OS C102 PDF

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May 8, 2020

The electronic pdf version of this document found through is the officially binding version. OFFSHORE STANDARD. DNV-OS-C If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall. DNV GL rules for classification: High speed and light craft (RU-HSLC) Maritime > DNV GL offshore standards (OS) > Document code: DNVGL-OS-C

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Environmental Loads E General Environmental loads are loads caused by environmental phenomena. The extent of the supporting structure is limited to the structural members affected by the local loads from the topside structure. The unit is normally equipped with dynamic positioning system with several thrusters.

DNV-OS-C Structural Design of Offshore Ships_百度文库

E General The loading instrument used to monitor the still water bending moments and shear forces as well as the stability of the unit shall be in compliance with the requirements of the Rules for Classification of Ships.

General Application and Assumptions B Alternative 2 – Hull girder capacity cnv on direct calculations of wave loads If the hull girder capacity is to be based on calculated wave loads according to the principles given in Ch. The shear force d102 be corrected according to Rules for Classification of Ships Pt. Note that the Ms in the equations given above include the global effect of top side loads.

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Units intended to stay on location for prolonged periods shall also comply with the requirements given in Appendix A. Structural Details A General For the design of structural xnv consideration should be given to the following: In addition the local structure shall be considered for the special load cases as defined in Sec. Topside Facilities Structural Support Critical areas of dropped objects are to be determined based on crane operation sectors, crane reach and actual movement of slings assuming a drop direction within an angle to the vertical direction of 5?

Turret and Moonpool Areas Site specific environmental data shall be used for calculation of long term stress range distribution. Alternatively the worst scatter diagram can be used as basis for calculation of fatigue life. See Classification Note Bilge Keels B General The requirements for design of bilge keels apply to turret od units and to spread dnb units. The transfer functions shall be combined in the cumulative damage calculations.

The expected dynamic load history shall be the basis for the calculations. D Calculation of global dynamic stress ranges Global stress ranges shall be determined from the global hull bending stresses, axial stresses and torsional stresses. D Turret structure, bow recess and moonpool area The following loads dbv be considered for the fatigue design of turret structures: Inspection and Maintenance B Facilities for inspection on location Inspections may be carried out on location based on xnv procedures outlined in a maintenance system and inspection arrangement, without dng the function of the unit.

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The different alternative design principles are given in Table B1. Loss of Heading Control The transverse strength shall meet the requirements given in the Rules for Classification of Ships Pt.

The transverse strength should be evaluated using a finite element model. C Sloshing loads in tanks B. Typical extent of the model may be three cargo tanks. A component stochastic analysis as described in Classification Notes B Hull girder bending capacity Gross scantlings may be utilised in the calculation of hull structural resistance, provided a corrosion rnv system in accordance with DNV-OS-C, is maintained.

DNV GL rules and standards

Each mooring system configuration will impose loads on the hull structure. Loads used in the global check shall be consistent. Longitudinal Stresses B General Global longitudinal nominal stresses should normally be Global shear stresses shall be calculated considering the vertical shear force at the transverse section in question as well as the actual shear flow distribution in the section. For details not covered by Classification Note D Structure in way of moonpool opening The structural strength shall be evaluated considering all relevant, realistic load conditions and combinations, see Sec.

Corrosion Protection C Maintenance program A maintenance program shall be made taking into consideration that no dry-docking is planned for the unit.