I. Introduction
Guangzhou Shipyard International Company Limited is a subsidiary of China Shipbuilding Industry Corporation, one of the eight shipyards, its stock in 1993 while in Hong Kong and Shanghai listing, the domestic shipping industry is the only one listed company. Guangzhou Shipyard International in Southern China's largest modern integrated shipbuilding enterprise products include ships, container, steel, pressure vessels, mechanical engineering, etc., output value of more than 20 billion per year, effective at the forefront of the industry. With the continuous development of business situation, the annual shipbuilding capacity of the continuous improvement of the design, manufacture, set higher requirements. To effectively reduce the ship design and construction cycle and improve product quality, it is necessary to use modern technology to update the existing design and construction methods. To this end, the company decided to establish Guangzhou Shipyard International Ship CAD / CAM Systems (GSI-CAD/CAM), and as Guangzhou Shipyard International CIMS (GSI-SCIMS) of the first projects to implement.
From 1992 to 1993 period, GSI-CAD/CAM project has just been set up, Guangzhou Shipyard International on CAD / CAM software and hardware for a wide range of research and demonstration, and finally decided to DEC hardware platform used by the U.S. company ALPHA models, application support platform with Sweden KCS's TRIBON system. The following hardware and software platform on GSI-CAD/CAM, applications, make a brief introduction.
2, Guangzhou Shipyard International CAD / CAM system
I was in July 1994 the company introduced a CAD / CAM software ─ ─ TRIBON support system, the software from Sweden KCS (KockumComputerSystemAB) develops, is a set of design and construction of ships for the aid of computer software integrated systems, but also a more advanced and practical expert system. GSI-CAD/CAM this as a platform, developed with GSI characteristics of CAD / CAM system. In early 1994, according to GSI-CAD/CAM development needs, we have set up a number of issues the development team, such as the development team, cabin layout of the system development team, development team pipe system, cable system development team, development team and other graphical interface system. Division of labor between the various groups to coordinate the development, establishment of a number of basic database, such as cabin components library, pipe components library, pipe electrical symbol library, equipment, libraries, etc. Most of the establishment is completed, but also the actual situation of our company, related to the development of various components coding principle, to establish a set of coding system. Now the discussion group have achieved good results, hull design systems, computer-aided systems of information cabin layout, graphics and character conversion interface system, tube data interface system, cable applications, etc., have been successfully developed.
GSI-CAD/CAM system consists of four sub components:
(1) hull design subsystem
By the ship hull design subsystem preliminary design, linear smoothing, hull modeling, lofting the hull of four modules, including preliminary design, performance calculations start to linear smoothing the hull structure modeling, parts production, nesting, Finally generate cutting instructions. Can calculate the components of weight, center of gravity and area, and can interfere with inspection, can accurately check whether there is collision between parts.
(2) cabin layout design subsystem
Cabin layout system is mainly based on the computer as a tool to assist professionals in the cabin layout, and can count the number of parts to calculate the weight of parts, the focus of a variety of floor plan drawn by computer, install the maps, making maps and print a variety of schedule list, material list statistics.
(3) tube design subsystem
Pipe design system, including schematic design and drawing of tube, tube modeling, production information generating and outputting the main module. Schematic design and drawing of tube, mainly through human-computer interaction module to draw the tube diagram, the module provides a number of professional drawing tools, can greatly improve the efficiency of drawing. Not only the output tube diagram, pipe production plans, pipe installation drawings, and the list can provide data, such as valve parts list, bill of materials and other tubes.
(4) cable design subsystem
Cable design subsystem can be divided into cable schematic design and cable lofting two modules. Schematic design is similar to tube schematic design, by way of human-computer interaction design, the system can output cable schematic diagram and the list. Cable Layout is conducted on three-dimensional graphical environment and provide the relevant block, pipe and other specialized equipment transferred, electrical equipment and its support arrangement, composition cable path, brackets and through, check the cable connection path case , cable laying, check the cable path and so on.
Third, characteristics of the hardware platform
As the large volume of ship design drawings, one-ton ship drawing capacity of as many as tens of thousands of copies, so shipbuilding CAD / CAM system on the host speed, network bandwidth, high speed workstation requirements, but also the price for business are affordable. Through the program more than a computer company, product and service cost performance comparison, the final choice of the DEC's AlphaAXP products. The reasons are:
TRIBON system was only running on DEC's OPENVMS platform;
AlphaAXP is open 64-DEC-date for the RISC structure, has good scalability and high reliability;
DEC's computer chip technology is the world's leading, high performance of its machines;
DEC's new architecture consists of a single chip, it has a better price performance ratio.
GSI-CAD/CAM existing system hardware configuration is: a server (model ALAPHSERVER41005/533), the memory capacity of 1024MB, external memory capacity of 56GB. Product design data disk using disk mirroring, data reliability for the product to provide a full guarantee. The entire system is equipped with 45 sets of graphics workstations (model ALAPHSTATION2004/233 and DEC3000/300, ALPHASTATION2004/266, 5 / 533), each configuration memory 64M or 128M, external memory 1GB, 2GB or 4.3GB. In order to facilitate graphics processing, each workstation is equipped with a 21 inch, 19 inch, 17-inch large screen display, and with a graphics accelerator card. The operating system OPENVMAXP7.2, CLUSTER cluster machine way to construct the whole system.
DECNet Ethernet network solution also uses the program, when the popular Ethernet network technologies 10M, Fast Ethernet (100M), ATM three, but considering the limited bandwidth of Ethernet technology support, ATM technologies are not mature Therefore, we chose a more mature and has a good-bandwidth (100MBPS) Fast Ethernet solutions. In this way, a lot of design to ensure the rapid exchange of graphical data, but also to the system operation of high reliability. Computer either DOS or WINDOWS environment, can be easily networked through PATHWORS and workstation group, a partial list of such documents can be sent to the computer processing, to reduce the burden of the workstation task is busy.
4, application
Our company was established in early 1994 GSI-CAD/CAM systems engineering, through the development, popularization and application of a period of time, by the end of 1994 was officially put into use in product design 25600t. So far, the design of products using the system are:
Czech 25600t dry cargo ships;
Germany 44000t bulk carrier;
COSCO 27000t bulk carrier;
Sinotrans 27000t bulk cargo / transport vessel;
Denmark 35000t Oil Tanker;
Iran 21000t multi-purpose vessels (type);
Denmark RO-RO (Ro) ships;
28000t multi-purpose container ship COSCO;
Military 922 life-saving salvage boat;
Sweden ROPAX ship.
In recent years, GSI-CAD/CAM development and application of the system has made gratifying achievements in order to shorten the design cycle to make a contribution to the design capability of 1.7 products in 1996 increased nearly three in 1997 about products, GSI-CAD / CAM system, promote the use of power can not be destroyed, from the following data can be reflected.
Design drawings amounted to more than 20 million copies;
Design of electronic document data capacity more than 8,500 megabytes;
All around the GSI-CAD/CAM system applications for the training of 23 times, training GSI-CAD/CAM
Professional applications and developer of more than 120 people;
Secondary development of the professional subsystem up to 6 months, part of the company's scientific and technological progress awards received;
Establishment and improvement of adaptation GSI-CAD/CAM Category 5 new coding system for the system;
Graphics created tens of thousands of parts and attributes database;
Developed the GSI-CAD/CAM application, maintenance and management systems supporting the standard 7.
5, system application efficiency
By using GSI-CAD/CAM system, successfully design and manufacture of the vessels ton ship products, and achieve significant economic benefits. Mainly reflected as follows:
(1) through the application of the system design of the ship, professional (ship, aircraft equipment, electrical equipment) of the design cycle has been shortened to varying degrees, the fastest hull design can shorten the one-month period, which labor-intensive, capital-intensive shipbuilding industry is a very great progress, greatly reducing the capital stock turnover cycles and cycle parts, thus improving the company's market competitiveness.
(2) through the application of the system design drawing quality has improved greatly reduced quality caused by drawing the material waste, product quality and therefore be improved.
(3) through the application of the system, the company has established a set of coding system and the huge ship standard parts database, make the design more standardized. Species in the application process, but also trained to understand computers and professional group of technical personnel, technology itself is an accumulation of wealth.
(4) System designed to raise the level of the company as a whole provides a basis. Thus, GSI-CAD/CAM system also achieved a wide range of indirect benefits.