7461 International Standard (Iso INTE RNATIONAL ORGANIZATION FOR STANDARDIZATIONMEKAYHAPOAHAR OPFAHW3ALMA NO CTAHAAPTW3ALWWORGANISATION INTERNATIONALE DE NORMALISATION Shipbuilding - Shiplines - Numerical representation of elements of the hull geometry Construction navale - Formes et lignes de navires -Représentation numerique des élements de la forme geometrique delacarene First edition - 1984-09-15 UDC 621.12.011.1 : 681.3.041 07461-1984 (E) Ref.No.ISO7461-1984 (E) Descriptors : shipbuilding, ship hulls, geometric characteristics, numeric representations, information interchange. Price hased nn2nar Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Every member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7461 was prepared by Technical Committee ISO/TC 8, Shipbuilding and marine structures. International Organization for Standardization,1984 Printed in Switzerland Coovriaht Intemational Oraanization for Standardization INTERNATIONALSTANDARD ISO 7461-1984 (E) Shipbuilding - Shiplines - Numerical representation of elements of the hull geometry Scope and field of application 3 Numerical definition of lines This International Standard establishes a method of represent- A plane chain curve is adopted as the standardized basis to ing the geometry of ship hull lines in numerical form, to allow define ship hull lines. Those lines which do not lie in a plane are exchange of geometrical data between different systems of defined as projections on orthogonal planes. ship hull definition. The data formats to be used are specified in ISO 7838. 3.1 Interpolating functions The ship hull lines are defined by means of a set of interpolating functions. The standard interpolating functions are straight line 2References and circular arc. Iso 7460,Shipbuilding- Shiplines - Identification of 3.2 Definition of the ship hull line geometric data. The ship hull line is composed of (N-1) segments. Each seg- ISo7838,Shipbuilding-Shiplines- Formats and data ment may be a straight line or a circular arc. The angle α of a organization. circulararc is less thanπ(see the figure). [P(1+1),V(1+1)] ({P(1), V(1) V(I+ 1) v(I) [PS(I+1), VS(1+1)] vs( I+1) p P(1) PS(I+1) P(1+1) Figure Coovriaht Intermational Oraanization for Standardization