1、BRITISH STANDARDBS EN ISO 12215-5:2008Small craft Hull construction and scantlings Part 5: Design pressures for monohulls, design stresses, scantlings determinationICS 47.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g
2、51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 12215-5:2008This British Standard was publishe
3、d under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 53212 2National forewordThis British Standard is the UK implementation of EN ISO 12215-5:2008. The UK participation in its preparation was entrusted to Technical Committee GME/33, Small craft.A
4、 list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from l
5、egal obligations.Amendments/corrigenda issued since publicationDate CommentsCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO
6、12215-5April 2008ICS 47.020.10; 47.080English VersionSmall craft - Hull construction and scantlings - Part 5: Designpressures for monohulls, design stresses, scantlingsdetermination (ISO 12215-5:2008)Petits navires - Construction de la coque et chantillonnage- Partie 5: Pressions de conception pour
7、monocoques,contraintes de conception, dtermination delchantillonnage (ISO 12215-5:2008)Kleine Wasserfahrzeuge - Rumpfbauweise undDimensionierung - Teil 5: Entwurfsdrcke frEinrumpffahrzeuge, Entwurfsspannungen, Ermittlung derDimensionierung (ISO 12215-5:2008)This European Standard was approved by CEN
8、 on 28 December 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards m
9、ay be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CE
10、N Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
11、 Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any for
12、m and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 12215-5:2008: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Foreword This document (EN ISO 12215-
13、5:2008) has been prepared by Technical Committee ISO/TC 188 “Small craft“ in collaboration with Technical Committee CEN/SS T01 “Shipbuilding and maritime structures” the secretariat of which is held by CMC. This European Standard shall be given the status of a national standard, either by publicatio
14、n of an identical text or by endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall
15、 not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive, see inf
16、ormative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finla
17、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 12215-5:2008 has been approved by CEN as a EN
18、 ISO 12215-5:2008 without any modification. BS EN ISO 12215-5:2008Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiContents Page Introduction . vi 1 Scope . 1 2 Normative refer
19、ences . 1 3 Terms and definitions. 2 4 Symbols . 4 5 General. 6 6 Dimensions, data and areas 7 6.1 Dimensions and data 7 6.2 Areas 7 7 Pressure adjusting factors 9 7.1 General. 9 7.2 Design category factor kDC9 7.3 Dynamic load factor nCG9 7.4 Longitudinal pressure distribution factor kL10 7.5 Area
20、pressure reduction factor kAR. 11 7.6 Hull side pressure reduction factor kZ12 7.7 Superstructure and deckhouse pressure reduction factor kSUP. 13 7.8 Light and stable sailing craft pressure correcting factor for slamming kSLS. 13 8 Design pressures 14 8.1 Motor craft design pressure 14 8.2 Sailing
21、craft design pressure 16 8.3 Watertight bulkheads and integral tank boundaries design pressure 16 8.4 Design pressures for structural components where kARwould be u 0,25 . 18 9 Dimensions of panels and stiffeners 19 9.1 Dimensions of plating panels 19 9.2 Dimensions of stiffeners 23 10 Plating Scant
22、ling equations 25 10.1 Thickness adjustment factors for plating 25 10.2 FRP single-skin plating 28 10.3 Metal plating Aluminium alloy and steel 29 10.4 Laminated wood or plywood single-skin plating 30 10.5 FRP sandwich plating. 31 10.6 Single-skin plating minimum thickness .35 11 Stiffening members
23、requirements 36 11.1 General. 36 11.2 Properties adjustment factors for stiffeners37 11.3 Design stresses for stiffeners . 37 11.4 Requirements for stiffeners made with similar materials. 38 11.5 Requirements for stiffeners made with dissimilar materials . 39 11.6 Effective plating 40 11.7 Overall d
24、imensions of stiffeners . 41 11.8 Structural bulkheads 43 11.9 Structural support for sailing craft ballast keel.44 BS EN ISO 12215-5:2008Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from
25、IHS-,-,-iv 12 Owners manual. 44 12.1 General . 44 12.2 Normal mode of operation . 44 12.3 Possibility of outer skin damage. 44 Annex A (normative) Simplified method for scantling determination 45 Annex B (normative) Drop test for boats of 0,07(mLDC)2/3where ASis the total profile area of all sails t
26、hat may be set at one time when sailing close hauled, as defined in ISO 8666 and expressed in square metres NOTE In the rest of this part of ISO 12215, non-sailing craft are considered as motor craft. 3.4 second moment of area I for a homogeneous material, it is the sum of the component areas multip
27、lied by the square of the distance from centre of area of each component area to the neutral axis, plus the second moment of area of each component area about an axis passing through its own centroid, and is expressed in centimetres to the fourth or millimetres to the fourth NOTE The second moment o
28、f area is also referred to in other documentation as the moment of inertia and for brevity as “second moment” within this part of ISO 12215. 3.5 section modulus SM for a homogeneous material, it is the second moment of area divided by the distance to any point from the neutral axis at which the stre
29、ss is to be calculated and is expressed in cubic centimetres or cubic millimetres NOTE The minimum section modulus is calculated to the furthest point from the neutral axis. 3.6 displacement craft craft whose maximum speed in flat water and mLDCconditions, declared by its manufacturer, is such that
30、WL5VL30, in degrees, V, for motor craft, the maximum speed in calm water declared by the manufacturer, with the craft in mLDCconditions. This speed shall not be taken as 3,0, that value or the value from Equation (2) shall be used. CG0,17LDC0,5 Vnm= (2) In any case, nCGneed not be taken 7. NOTE 2 Th
31、e limitation on nCGin this paragraph is due to the limitation of speed by the crew to keep the slamming accelerations within acceptable comfort and safety limits. The crew of “super sports” or racing boats accept a harder ride than a family cruiser, but need special body support, shock damping seats
32、 or equipment to prevent injury from high gs. 7.3.3 Dynamic load factor nCGfor sailing craft and displacement motor craft For sailing craft, nCGis not used for pressure determination. It is only used in the calculation of kLfor which purpose the value of nCGshall be taken as 3. For motor craft where
33、 nCG, determined using Equation (1), is 1 for WL0,6xLu (3) L1k = for WL0,6xL where nCGis determined in accordance with 7.3, but for the purposes of determination of kL, nCGshall not be taken 6; WLxLis the position of the centre of the panel or middle of stiffener analysed proportional to LWL, where
34、WLxL= 0 and 1 are respectively the aft end and fore end of LWL. where x is the longitudinal position of the centre of the panel or middle of stiffener forward of aft end of LWLin mLDCconditions, in metres. The overhangs fore and aft shall have the same value of kLas their respective end of the water
35、line. BS EN ISO 12215-5:2008Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11NOTE In the graph the only represented intermediate value of nCGbetween 3 and 6 is 4,5; for other in
36、termediate values, kLshall be determined either by calculation according to Equation (3) or by interpolation in the graph. Figure 3 Longitudinal pressure distribution factor kL7.5 Area pressure reduction factor kAR7.5.1 General The area pressure reduction factor kARtakes into account the variation o
37、f pressure loads due to panel or stiffener size. 0,15RLDCAR0,3D0,1kmkA= (4) where kRis the structural component and boat type factor: kR= 1,0 for bottom side and deck panels and stiffeners of planing motor craft operating in planing mode; kR= 1,5 3 104 b for bottom side and deck panels of sailing cr
38、aft, displacement motor craft and planing motor craft operating in displacement mode; 4Ru1210kl= for bottom side and deck stiffeners of sailing craft, displacement motor craft and planing motor craft operating in displacement mode; mLDCis the loaded displacement mass defined in 3.2, in kilograms; BS
39、 EN ISO 12215-5:2008Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12 ADis the design area, in square metres: ()6D10Alb= for plating, but shall not be taken 262,5 10b ; ()6Du10A
40、ls= for stiffeners but need not be taken 1. 7.5.3 Minimum values of kARkARshall not be taken at less than the values given in Table 3. Table 3 Minimum values of kARSide and bottom sandwich panels aDesign category Side and bottom single-skin panels and stiffeners Deck and superstructures sandwich and
41、 single-skin panels and stiffeners WL0, 4xLu WL0, 4 0,6xL800 mm above deck and upper tiers 0,35 Walking area Upper tiers aMinimum deck pressure 5 kN/m3Non-walking area aElements not exposed to weather shall be considered as upper tiers. 7.8 Light and stable sailing craft pressure correcting factor f
42、or slamming kSLSThe light and stable sailing craft pressure correcting factor kSLStakes into account higher slamming pressures encountered on light and stable sailing craft when sailing upwind (i.e at an angle of up to 90 off true wind). It is defined below. In design category C and D: kSLS= 1 In de
43、sign category A and B: kSLS= 1 if 3WLLDC5mL 0,50,5MAX 60 WLSLS0,33LDC10 GZ Lkm60, with all stability-increasing devices such as canting keels or water ballast at their most effective position, in fully loaded condition, measured in metres. If the maximum righting lever occurs at a heel angle 60, the
44、 value at 60 shall be taken. The crew shall be considered in upwind hiking position in the calculation of the above GZMAX 60. BS EN ISO 12215-5:2008Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without lic
45、ense from IHS-,-,-14 8 Design pressures 8.1 Motor craft design pressure 8.1.1 General The bottom pressure of motorcraft shall be the greater of (see NOTE 1) the displacement mode bottom pressure PBMDdefined in 8.1.2 or the planing mode bottom pressure PBMPdefined in 8.1.3. For motorcraft of design c
46、ategories A and B, the side pressure shall be the greater of (see NOTE 3) the displacement mode side pressure PSMDdefined in 8.1.4 or the planing mode side pressure PSMPdefined in 8.1.5. For motorcraft of design categories C and D, the side pressure shall be the one corresponding to planing or displ
47、acement mode: the “mode” to consider is the one where the bottom pressure, planing or displacement is the greater (see NOTE 4). NOTE 1 The reason behind this double requirement is that, in rough seas, craft that usually plane in flat water must progress at a slower speed in the same manner as a disp
48、lacement craft. NOTE 2 Craft well into the planing mode,WL5,VLW will usually experience PBMPvalues higher than PBMD. NOTE 3 In planing mode, the side pressure may be smaller than in displacement mode as, in the former case, the side pressure is interpolated between 0,25 PBMPand deck pressure, whereas, in the latter case, the side pressure is interpolated between bottom pressure and deck pressure. NOTE 4 In design category D there is little risk on having to slow down because of rough sea, and this risk is limited in category C. 8.1.2 Motor craft bottom pressure in displacement mo
