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

Amended July 2011, see page 3 Rules for High Speed, Light Craft and Naval Surface Craft, January 2011Pt.3 Ch.1 Sec.3 – Page 250.5B WL=0.5B MAX0.5B WL0.5B WL0.5B MAX0.5B MAXL B MAXFig. 5Definition of parameters in case of different sectional shapes203 The vertical shear force in centreline between twin hull may be assumed to be:S=Δ a------------- cg(kN)qq = factor given in Table B1.Table B1 Factors s and qService restriction s qR4-R6R3R2R1R08.07.56.55.54.06.05.55.04.03.0204 For craft with length L ≥ 50 m the twin hull still water transverse bending moment shall be assumed to be:M S0 = 4.91 Δ ( y b – 0.4 B 0.88 ) (kNm)M S0 = still water transverse bending momentD = displacement in tonnesy b = distance in m from centre line to local centre line of one hull (see Fig.6 for definition)B = width over all in m.y bFig. 6Definition of local geometry for one hull on twin hull craftDET NORSKE VERITAS AS