A Method for Automatic Nesting of Ship Plates

2005 ◽  
Vol 21 (01) ◽  
pp. 14-27
Author(s):  
J. Vitória ◽  
C. Guedes Soares
Keyword(s):  
Model Data ◽  
Product Model

This work describes a method that provides an automatic nesting method and an optional simple interactive nesting tool for final adjustments. This approach has been incorporated in a system that has been developed for small shipyards and has been connected with a Standard for the Exchange of Product Model Data (STEP) interface that produces the data in a neutral format. In this paper a review is provided of methods for plate nesting and the method adopted is described. Examples of applications are given demonstrating the performance of the system with academic examples and with realistic examples with ships parts. It is demonstrated that a good performance is achieved.

scholarly journals Feature-based translation of CAD models with macro-parametric approach: issues of feature mapping, persistent naming, and constraint translation

2020 ◽  
Vol 7 (5) ◽  
pp. 603-614 ◽  
Author(s):  
Mutahar Safdar ◽  
Tahir Abbas Jauhar ◽  
Youngki Kim ◽  
Hanra Lee ◽  
Chiho Noh ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Parametric Approach ◽  
Model Data ◽  
Feature Mapping ◽  
Product Model ◽  
Cad Systems ◽  
Cad System ◽  
Cad Models ◽  
Feature Based ◽  
Aided Design

Abstract Feature-based translation of computer-aided design (CAD) models allows designers to preserve the modeling history as a series of modeling operations. Modeling operations or features contain information that is required to modify CAD models to create different variants. Conventional formats, including the standard for the exchange of product model data or the initial graphics exchange specification, cannot preserve design intent and only geometric models can be exchanged. As a result, it is not possible to modify these models after their exchange. Macro-parametric approach (MPA) is a method for exchanging feature-based CAD models among heterogeneous CAD systems. TransCAD, a CAD system for inter-CAD translation, is based on this approach. Translators based on MPA were implemented and tested for exchange between two commercial CAD systems. The issues found during the test rallies are reported and analyzed in this work. MPA can be further extended to remaining features and constraints for exchange between commercial CAD systems.

scholarly journals A STEP to Improved CAD

1998 ◽  
Vol 120 (02) ◽  
pp. 84-85 ◽  
Author(s):  
Henry Baumgartner
Keyword(s):  
Product Information ◽  
Open Systems ◽  
Two Dimensional ◽  
Model Data ◽  
Product Model ◽  
Complete Product ◽  
Product Models ◽  
The World ◽  
Cad Cam ◽  
A Company

This article highlights that by using a standard that enables complete product model data to be transmitted digitally, a company can build open systems to make information available on many platforms throughout its operations. The world of CAD/CAM has viewed the International Graphics Exchange Standard (IGES) as its translation standard for years, using the system to move two-dimensional models from one program to another. While IGES does, in fact, do a good job of transmitting basic geometry, another translator—the Standard for the Exchange of Product Data (STEP) —has been gaining on IGES in popularity. STEP goes considerably further than just transmitting geometry; it provides users with the ability to express and exchange digitally useful product information throughout a product's life cycle, including design, analysis, manufacturing, and support. In short, IGES transmits two-dimensional drawings, while STEP transmits complete product models. The updated schema, consisting of an ASCII file written in EXPRESS, is simply run through a utility that merges the extensions that have been added by Unigraphics with the standard ST-Developer libraries. Updating the translator to incorporate an upgraded version of the libraries is just as easy.

System Independent Product Models in Computer Aided Elastomeric Compact Seal Design

1988 ◽  
Author(s):  
H. L. Johannesson
Keyword(s):  
Data Base ◽  
Data Storage ◽  
Product Information ◽  
Data Retrieval ◽  
Model Data ◽  
Product Model ◽  
Cad System ◽  
Seal Design ◽  
Computer Aided ◽  
Independent Product

Abstract In this work the problem of designing a CAD-system independent product model data base, to be used in computer aided elastomeric seal design, is treated. It is shown how a general purpose turn-key CAD-system can be used together with an external product model data base and external calculation programs. The importance of storing product information in a CAD-system independent data base instead of on drawings in one particular CAD-system is pointed out. This is of special interest from long time storage point of view, as product related information is expected to live longer in a manufacturing company than one particular CAD-system. In order to be able to transmit data between the CAD-system and the external product model data base, and between the data base and the external calculation programs, special interfaces must be designed. Here it is demonstrated how such interface programs can be designed using FORTRAN 77 and a particular graphic application program language available in the CAD-system CDM 300. For the creation of the data base and for the data storage and data retrieval, the data base management system TORNADO is used. Finally the simultaneous use of the CAD-system, the external data base and the calculation program, when designing an elastomeric seal cross section, is demonstrated with a test example.

An Alternate Approach to the Exchange of Ship Product Model Data

2008 ◽  
Vol 24 (02) ◽  
pp. 92-98 ◽  
Author(s):  
Ben Kassel ◽  
Ted Briggs
Keyword(s):  
Reference Data ◽  
General Purpose ◽  
Model Data ◽  
Product Model ◽  
Data Libraries ◽  
Application Protocols

This paper considers an alternate approach to the exchange of ship product model data based on general-purpose STEP application protocols. The vision is to provide the functionality defined in the shipbuilding application protocols using a combination of STEP AP239, AP214, and reference data libraries. It is expected that AP239 translators will soon be available, thus enabling the exchange of significant portions of ship product model data.

Application of Rules for Quality Control of Product Model Data

2009 ◽  
Author(s):  
R Brosnart ◽  
◽  
A Geitmann ◽  
K Stenzel ◽  
◽  
...  
Keyword(s):  
Quality Control ◽  
Model Data ◽  
Product Model

Development of Product Model Data Exchange Between Different 3D CAD Systems in Japanese Shipyards

2015 ◽  
Author(s):  
T Hiraki ◽  
◽  
T Hirayama ◽  
Y Ohtsuki ◽  
K Maeda ◽  
...  
Keyword(s):  
Data Exchange ◽  
Model Data ◽  
Product Model ◽  
Cad Systems ◽  
3D Cad

STEP (Standard for the Exchange of Product Model Data) resource integration:

1991 ◽  
Author(s):  
William F Danner ◽  
David T Sanford ◽  
Yuhwei Yang
Keyword(s):  
Resource Integration ◽  
Model Data ◽  
Product Model ◽  
Data Resource ◽  
Step Standard
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