This standard specifies a method for representing hull lines in digital form to facilitate the conversion of geometric data between different hull definition systems. The data format used is defined by ISO 7838. GB/T 17725-1999 Shipbuilding Hull Lines Digital Representation of Hull Geometric Elements GB/T17725-1999 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T 17725—1995
eqy1so7461.1984
Hull lines
Digital representation of hull geometrical elements
Shipbuilding-Shiplines Numerical representationatiorofelementsoftlehullgeomelry
Published on April 15, 1999
Implementation on December 1, 1999
Published by State Quality and Technical Supervision BureauwwW.bzxz.Net
GR/T17725—1999
This standard uses TS 1741:181 to represent the digital representation of hull lines and geometrical elements of a ship. Recently, the shipbuilding industry in my country has generally used computers to assist in the design and construction of ships. The formulation of this standard will play a role in unifying the engineering management of computer-aided design and construction in China and promoting scientific and technological exchanges at home and abroad. This standard is issued by China Shipbuilding Industry Corporation from the date of its issuance. This standard is from the Comprehensive Technical and Economic Research Institute of China Shipbuilding Industry Corporation. The drafting unit of this standard is the 11th ... The draft of an international standard approved by the technical committee shall be sent to the member groups for approval before being approved as an international standard by the departmental board of directors. According to the departmental standard procedure, the draft of an international standard needs to be approved by at least 7% of the member groups voting to become an international standard. International standard J5(150)/T.8 Shipbuilding and offshore structure technical qualification meeting: 1 Standard
National Standard of the People's Republic of China
Hull lines
Digital representation of hull geometric elements
Shlpbulldlng Shipllnes Nurmerlcal represeutationor elenveutg or the hull geometryCR/T 17725—:999
en+ 1$0 7461:1984
This standard specifies a method of representing the type of ship in digital form, so that data can be easily converted between different ship definition systems. The data format used is as follows: S3
2 Referenced Standards
The standard documents are listed in the standard, which are referenced in this standard to form a semi-standard document. When the version is marked, the capital indicated is valid. All parties to this standard should refer to the latest version of the following documents. 1507835:1954 Shipbuilding Engineering 4 Linear Format Data Structure 3 Numerical Definition of Types
A series of related horizontal lines are used as the basis for defining the new type. For non-horizontal types, the projection lines on orthogonal planes are used to define the type.
3.1 Interpolation Functions
The type of line is defined by a set of interpolation functions. The two standard functions are straight line and linear. 3.2 Definition of the type line
The type line consists of a series of line segments, each of which can be a line or a sub-line, and each of which is a concentric "1". The number of the type line is a real array, which is a sequence compiled in the FURTRAV language. This number is defined as: DLMENSION P:N.VSA2,PS(N,VSEN?N is the number of points on the line, and P(,V are the ordinate and the mark of the first point respectively. See 1;SH.VS is divided into the first section and the corresponding longitudinal half and half mark of the center of return: the unit is m. Figure 1;: and: He Huiwen, its use, approved by the State Administration of Quality and Technical Supervision on 1999-[4-15 and implemented on 1999-12-01, Ha+isa, the line can not be sent three times, that is, GB/T7725-1999, Lr(n,vu,ABS,P(>-PU+IH.AES[V() V(I-)e
I=1.&,(N-1)
When PS (MAX) the first segment is a straight line. In this case the first segment has no geometric meaning and can be used for other purposes. When MAX is -1, the first segment is an arc. In this case the virtual exit period is determined by the radius of the first point and the first point, that is,
AESISQRTEFF
Ps 1 --
SQRT[P( - PS - +) -VS+T: E. The range depends on the tolerance of the CNC plotter and (or cutting machine). The standard value of e is c. 1 xm, and the value of
MAX must obviously be the actual value of the hull coordinates. The standard value of MAX is UCJO
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