RULES DET NORSKE VERITAS (DNV) = STRUCTURES = - Boat Design Net

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Amended July 2011, see page 3 Rules for High Speed, Light Craft and Naval Surface Craft, January 2011Pt.3 Ch.3 Contents – Page 5D 300 Fibre Reinforced Plastic (FRP)........................................................................................................................... 19Sec. 3 Manufacturing.................................................................................................................................. 20A. General......................................................................................................................................................................... 20A 100 Basic requirements.............................................................................................................................................. 20B. Inspection..................................................................................................................................................................... 20B 100 General................................................................................................................................................................ 20B 200 Penetrant testing.................................................................................................................................................. 20B 300 Radiographic testing ........................................................................................................................................... 20B 400 Ultrasonic examination ....................................................................................................................................... 20C. Extent of Examination ................................................................................................................................................ 20C 100 General................................................................................................................................................................ 20D. Acceptance Criteria for NDT..................................................................................................................................... 20D 100 Acceptance criteria.............................................................................................................................................. 20E. Testing .......................................................................................................................................................................... 21E 100 Tanks................................................................................................................................................................... 21E 200 Closing appliances .............................................................................................................................................. 21Sec. 4 Hull Girder Strength........................................................................................................................ 22A. General......................................................................................................................................................................... 22A 100 Introduction......................................................................................................................................................... 22A 200 Definitions .......................................................................................................................................................... 22B. Vertical Bending Strength.......................................................................................................................................... 22B 100 Hull section modulus requirement...................................................................................................................... 22B 200 Effective section modulus................................................................................................................................... 22B 300 Hydrofoil on foils................................................................................................................................................ 23B 400 Longitudinal structural continuity ...................................................................................................................... 23B 500 Openings ............................................................................................................................................................. 23C. Shear Strength............................................................................................................................................................. 24C 100 Cases to be investigated...................................................................................................................................... 24D. Cases to be Investigated.............................................................................................................................................. 24D 100 Inertia induced loads........................................................................................................................................... 24E. Transverse Strength of Twin Hull Craft................................................................................................................... 24E 100 Transverse strength ............................................................................................................................................. 24E 200 Allowable stresses .............................................................................................................................................. 25Sec. 5 Plating and Stiffeners....................................................................................................................... 26A. General......................................................................................................................................................................... 26A 100 Introduction......................................................................................................................................................... 26A 200 Definitions .......................................................................................................................................................... 26A 300 Allowable stresses............................................................................................................................................... 26B. Plating .......................................................................................................................................................................... 26B 100 Minimum thicknesses ......................................................................................................................................... 26B 200 Bending............................................................................................................................................................... 27B 300 Slamming ............................................................................................................................................................ 27C. Stiffeners ...................................................................................................................................................................... 28C 100 Bending............................................................................................................................................................... 28C 200 Slamming ............................................................................................................................................................ 29Sec. 6 Web Frames and Girder Systems ................................................................................................... 30A. General......................................................................................................................................................................... 30A 100 Introduction......................................................................................................................................................... 30A 200 Definitions .......................................................................................................................................................... 30A 300 Minimum thicknesses ......................................................................................................................................... 30A 400 Allowable stresses............................................................................................................................................... 31A 500 Continuity of strength members ......................................................................................................................... 31B. Web Frames and Girders ........................................................................................................................................... 31B 100 General................................................................................................................................................................ 31B 200 Effective flange................................................................................................................................................... 31B 300 Effective web ...................................................................................................................................................... 32B 400 Strength requirements ......................................................................................................................................... 32DET NORSKE VERITAS AS
Rules for High Speed, Light Craft and Naval Surface Craft, January 2011 Amended July 2011, see page 3Pt.3 Ch.3 Contents – Page 6B 500 Girder tripping brackets ...................................................................................................................................... 33B 600 Girder web stiffeners........................................................................................................................................... 34Sec. 7 Pillars and Pillar Bulkheads............................................................................................................ 35A. General......................................................................................................................................................................... 35A 100 Introduction......................................................................................................................................................... 35A 200 Definitions .......................................................................................................................................................... 35B. Pillars............................................................................................................................................................................ 35B 100 Arrangement of pillars ........................................................................................................................................ 35B 200 Cross-section particulars..................................................................................................................................... 35B 300 Pillar scantlings................................................................................................................................................... 35B 400 Pillars in tanks..................................................................................................................................................... 36C. Supporting Bulkheads ................................................................................................................................................ 37C 100 General................................................................................................................................................................ 37Sec. 8 Weld Connections............................................................................................................................. 38A. General......................................................................................................................................................................... 38A 100 Introduction......................................................................................................................................................... 38A 200 Welding particulars............................................................................................................................................. 38B. Types of Welded Joints............................................................................................................................................... 38B 100 Butt joints............................................................................................................................................................ 38B 200 Tee or cross joints ............................................................................................................................................... 38C. Size of Connections ..................................................................................................................................................... 39C 100 Fillet welds, general............................................................................................................................................ 39C 200 Fillet welds and penetration welds subject to high tensile stresses .................................................................... 39C 300 End connections of girders, pillars and cross ties............................................................................................... 40C 400 End connections of stiffeners.............................................................................................................................. 40Sec. 9 Direct Strength Calculations ........................................................................................................... 43A. General......................................................................................................................................................................... 43A 100 Introduction......................................................................................................................................................... 43A 200 Application.......................................................................................................................................................... 43B. Plating .......................................................................................................................................................................... 43B 100 General................................................................................................................................................................ 43B 200 Calculation procedure ......................................................................................................................................... 43B 300 Allowable stresses............................................................................................................................................... 43C. Stiffeners ...................................................................................................................................................................... 43C 100 General................................................................................................................................................................ 43C 200 Calculation procedure ......................................................................................................................................... 44C 300 Loads................................................................................................................................................................... 44C 400 Allowable stresses............................................................................................................................................... 44D. Girders ......................................................................................................................................................................... 44D 100 General................................................................................................................................................................ 44D 200 Calculation methods ........................................................................................................................................... 44D 300 Design load conditions........................................................................................................................................ 44D 400 Allowable stresses............................................................................................................................................... 45Sec. 10 Buckling Control .............................................................................................................................. 46A. General......................................................................................................................................................................... 46A 100 Definitions .......................................................................................................................................................... 46B. Longitudinal Buckling Load ...................................................................................................................................... 47B 100 Longitudinal stresses........................................................................................................................................... 47C. Transverse Buckling Load ......................................................................................................................................... 47C 100 Transverse stresses.............................................................................................................................................. 47D. Plating .......................................................................................................................................................................... 47D 100 Plate panel in uni-axial compression .................................................................................................................. 47D 200 Plate panel in shear ............................................................................................................................................. 49D 300 Plate panel in bi-axial compression and shear .................................................................................................... 49E. Stiffeners in Direction of Compression ..................................................................................................................... 50E 100 Lateral buckling mode ........................................................................................................................................ 50E 200 Torsional buckling mode .................................................................................................................................... 51DET NORSKE VERITAS AS
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