Product Data Exchange to Support Modeling and Simulation

2005 ◽  
Vol 21 (03) ◽  
pp. 160-169
Author(s):  
T. Briggs ◽  
B. Gischner ◽  
P. Lazo ◽  
P. Lazo ◽  
A. Royal ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Electrical Heating ◽  
Model Data ◽  
Product Model ◽  
Shipbuilding Industry ◽  
Product Data ◽  
Computer Aided ◽  
Aided Design

Successful and efficient exchange of product model data has been a major challenge in the shipbuilding industry for the past two decades. The Standard for the Exchange of Product Model Data (STEP) has been developed to enable this capability. Four STEP application protocols (APs) to facilitate the exchange of structural and distributed systems models in shipbuilding were completed in 2003 and were adopted by the International Organization for Standardization (ISO) by mid-2004. In August 2003, ISO 10303–216: Ship Moulded Forms (AP216) became the first shipbuilding STEP AP to be published as an international standard. Participants involved in these efforts represent several major US shipyards, the Navy, and their computer-aided design/ engineering (CAD/CAE) vendors. The thrust of shipbuilding data exchange efforts has now shifted from development to implementation. This paper will report on efforts to develop and use translators for this AP to exchange hull form product data in the ship modeling and simulation arena. In addition, process simulation is becoming common in the design of new ships to validate that the design meets the customer's specifications. Current technology requires that the ship be modeled both in the computer-aided design (CAD) environment and then repeated in the simulation workbench. Not only is this effort inefficient, but it is inherently error prone. Through the National Shipbuilding Research Program (NSRP)-sponsored Integrated Shipbuilding Environment (ISE) projects, we have developed tool sets that use AP227: Plant Spatial Configuration to permit the design to flow smoothly from the CAD workbench to the simulation workbench. This paper summarizes the efforts to develop and use a suite of tools that enables US shipyards to become more productive. It details the specific successes in using AP216 and AP227 for modeling and simulation, as well as efforts to exchange design data electronically between CAD systems. The report also outlines efforts that are underway to use other APs to successfully exchange data describing ship electrical; heating, ventilation, and air-conditioning (HVAC); and controls systems.

STEP for Shipbuilding: A Solution for Product Model Data Exchange

2003 ◽  
Vol 19 (01) ◽  
pp. 44-52
Author(s):  
L. Benthall ◽  
T. Briggs ◽  
B. Downie ◽  
B. Gischner ◽  
B. Kassel ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
International Standards ◽  
Model Data ◽  
Product Model ◽  
Shipbuilding Industry ◽  
Product Models ◽  
Transfer Of Information ◽  
Aided Design ◽  
Step Standard

An international standard (ISO 10303) has been created to facilitate the exchange of product models between diverse computer-aided design (CAD) systems. Informally known as STEP (standard for the exchange of product model data), this specification has been under development since the mid 1980s, and parts of it were approved as international standards beginning in 1994. Efforts to expand STEP to meet the needs of the shipbuilding industry have been in work for many years and are nearing completion. By early 2003, it is expected that four application protocols to facilitate the transfer of information relating to ship structures, piping, and heating, ventilation, and air-conditioning will have been approved as international standards and become part of the overall STEP standard. This article discusses the successful efforts to expand STEP to meet the needs of the shipbuilding industry, as well as outlining the various implementation and testing projects that have been undertaken to ensure the validity and success of these new standards.

Status, Comparison, and Issues of Computer-Aided Design Model Data Exchange Methods Based on Standardized Neutral Files and Web Ontology Language File

2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Yuchu Qin ◽  
Wenlong Lu ◽  
Qunfen Qi ◽  
Xiaojun Liu ◽  
Yanru Zhong ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
Cad Model ◽  
Web Ontology Language ◽  
Model Data ◽  
Cad Systems ◽  
Ontology Language ◽  
Depth Analysis ◽  
Computer Aided ◽  
Aided Design

Exchanging computer-aided design (CAD) model data among heterogeneous CAD systems is indispensable for collaborative product development. Currently, the industry mainly uses the standardized neutral files-based methods to implement such exchange. While at the same time, the application of web ontology language (OWL) file and underlying semantic web technologies in CAD model data exchange is gaining importance and popularity within the academia. The coexistence of different types of methods has generated a series of controversies and questions within the industry and the academia. Yet, can the neutral files-based exchange methods completely implement model data exchange among heterogeneous CAD systems? What challenges have been addressed to date by the developed CAD model data exchange standards? Why OWL has been introduced to CAD model data exchange? Does CAD model data exchange really need OWL? Are there any issues in existing neutral files-based exchange methods and OWL file-based exchange methods need to be addressed in future studies? This paper proposes to conduct a study of the standardized neutral files-based exchange methods and OWL file-based exchange methods. An in-depth analysis of the widely used standard for the exchange of product model data (STEP) method and the newly emerging OWL methods is first provided. Then, the paper makes a detailed comparison between these two types of methods based on this analysis. Finally, some issues in the two types of methods that need to be addressed in the future are discussed.

Development of a Welding Protocol for Automated Shipyard Manufacturing Systems

1997 ◽  
Vol 13 (01) ◽  
pp. 48-56
Author(s):  
Joel Milano ◽  
Ben Kassel ◽  
Douglas Mauk
Keyword(s):  
Mass Production ◽  
Computer Aided Design ◽  
Manufacturing Systems ◽  
Computer Integrated Manufacturing ◽  
Production Environment ◽  
Model Data ◽  
Product Model ◽  
Computer Aided ◽  
Close Relationship ◽  
Aided Design

Robotic manufacturing systems have provided improvements in productivity and quality in the automotive and semiconductor industries. Shipbuilding, however, is a one-of-a-kind manufacturing process and as such embodies a completely different set of problems than the mass production environment. The planning for robotics applications in shipbuilding must be done for each unique component and, therefore, must be done efficiently to achieve the benefits of automation. This will require a close relationship between computer-aided design (CAD), computer-aided manufacturing (CAM), computer-integrated manufacturing (CIM), and the manufacturing systems used on the waterfront. One of the major efforts to be performed is the integration of these processes through the timely presentation of information. One of the tools that can be used to integrate these processes is the Standard for the Exchange of Product Model Data (STEP). This paper will identify the relevant components of a STEP applications protocol (AP) for welding which can be applied to shipbuilding and outline the efforts required to bring it into existence.

scholarly journals STEP File Analyzer Software

2017 ◽  
Vol 122 ◽  
Author(s):  
Robert Lipman
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
3D Visualization ◽  
Software Tool ◽  
Smart Manufacturing ◽  
Product Model ◽  
Engineering Software ◽  
Computer Aided ◽  
High Level ◽  
Aided Design

The STEP File Analyzer is a software tool that generates a spreadsheet or a set of CSV (comma-separated value) files from a STEP (ISO 10303 –STandard for Exchange of Product model data) Part 21 file. STEP files are used to represent product and manufacturing information (PMI) and for data exchange and interoperability between Computer-Aided Design (CAD), Manufacturing (CAM), Analysis (CAE), and Inspection (CMM) software related to the smart manufacturing digital thread. STEP is also used for the long-term archiving and retrieval of product data. A spreadsheet simplifies inspecting information from the STEP file at an entity and attribute level. Typical STEP file viewers show a 3D visualization of the part or model represented by the STEP file. The viewers usually have a high-level hierarchical display of the information in the STEP file where the user can drill down to individual attributes of parts. However, there is no way to view all of the actual STEP entities and their attributes at once. The STEP File Analyzer provides this capability by creating a spreadsheet from the STEP file. The STEP File Analyzer also generates reports for PMI Representation, PMI Presentation, and Validation Properties based on Recommended Practices defined by the CAx Implementor Forum (CAx-IF) [5]. The objective of the CAx-IF is to advance CAx (mainly Computer-Aided Design and Engineering) software system STEP translator development and to ensure that user requirements for interoperability are satisfied.

Geometric Modelling and Computer-Aided Design

2009 ◽  
pp. 1-31
Author(s):  
Xun Xu
Keyword(s):  
Computer Aided Design ◽  
Data Exchange ◽  
Geometric Model ◽  
Point Of View ◽  
Geometric Modelling ◽  
Cad Systems ◽  
Cad System ◽  
Wire Frame ◽  
Computer Aided ◽  
Aided Design

One of the key activities in any product design process is to develop a geometric model of the product from the conceptual ideas, which can then be augmented with further engineering information pertaining to the application area. For example, the geometric model of a design may be developed to include material and manufacturing information that can later be used in computer-aided process planning and manufacturing (CAPP/CAM) activities. A geometric model is also a must for any engineering analysis, such as finite elopement analysis (FEA). In mathematic terms, geometric modelling is concerned with defining geometric objects using computational geometry, which is often, represented through computer software or rather a geometric modelling kernel. Geometry may be defined with the help of a wire-frame model, surface model, or solid model. Geometric modelling has now become an integral part of any computer-aided design (CAD) system. In this chapter, various geometric modelling approaches, such as wire-frame, surface, and solid modelling will be discussed. Basic computational geometric methods for defining simple entities such as curves, surfaces, and solids are given. Concepts of parametric, variational, history-based, and history-free CAD systems are explained. These topics are discussed in this opening chapter because (a) CAD was the very first computer-aided technologies developed and (b) its related techniques and methods have been pervasive in the other related subjects like computer-aided manufacturing. This chapter only discusses CAD systems from the application point of view; CAD data formats and data exchange issues are covered in the second chapter.

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.

Sign in / Sign up

Export Citation Format

Share Document