GB/T 17725-2011Shipbuilding - Shiplines - Numberical repesentation of elements of the hull geometry (English PDF)
造船 船体型线 船体几何元素的数字表示
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2011
Implementation date
June 1, 2012
Scope
GB/T 17725-2011 is the English-translated version of 造船 船体型线 船体几何元素的数字表示.
GB/T 17725-2011 is the Chinese standard "Shipbuilding - Shiplines - Numberical repesentation of elements of the hull geometry". Its scope clause reads: This standard specifies the hull lines represented in digital form approach in order to geometry data between different definitions of hull conversion system.
Data format definitions used by the GB/T 23304-2009. This standard applies to hull lines numerals.
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Document preview — GB/T 17725-2011
National Standard of the People's Republic of China
- ICS
- 47.020.01
- Classification
- U 07
- Replacing
- GB/T 17725-1999
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3.1 Overview
- 3.2 Definition of hull lines
- 3.3 Continuous hull lines representation
1 Scope
This standard specifies the hull lines represented in digital form approach in order to geometry data between different definitions of hull conversion system.
Data format definitions used by the GB/T 23304-2009.
This standard applies to hull lines numerals.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 23304-2009 ship hull lines formats and data structures
Definition 3 type digital line
3.1 Overview
3.1.1
uses a series of interrelated plane curves as the basis for the definition of hull lines. For the non-planar type line with its orthogonal plane
On the projection line is defined.
3.1.2
using the interpolation function to define a set of hull lines. Standard functions are linear and circular interpolation.
3.2 Definition of hull lines
3.2.1
Each line consists of a type (N-1) line segments, each may be a straight line segment or arc, arc central angle alpha corresponding to the small
In pi.
3.2.2
continuous circular and linear hull lines consist of several segments end to end segments.
3.2.3
discontinuous line segments hull lines by a number of segments are not connected end to end, discontinuous information between each profile available -1E-8 and
Additional descriptive information expressed in two ways.
3.3 Continuous hull lines representation
3.3.1 center - Node digital representation
3.3.1.1
center - node number representation in Figure 1.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 17725
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 17725-2011 | Shipbuilding - Shiplines - Numberical repesentation of elements of the hull geometry | current edition | Current |
| GB/T 17725-1999 | Shipbuilding - Shiplines - Numberical repesentation of elements of the hull geometry | previous edition | Superseded |
This page sells the current edition, GB/T 17725-2011. Earlier editions are listed for reference only.
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