The National Shipbuilding Research Program. 1997 Ship Production Symposium, Paper Number 19: A Computer-Aided Process for Assessing the Ability of Shipyards to Use Technological Innovation PDF Download
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Languages : en
Pages : 14
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Book Description
This paper details a prototype personal computer based organizational evaluation system that allows a shipyard to evaluate its potential for technological innovation against a composite innovative organization. The system was developed by a combination of metaanalysis of available literature, interviews, and survey of shipbuilding industry personnel. The system is designed for self use by organizational members, and produces output that serves as basis for dialogue about changes necessary to increase the innovative capacity of a shipbuilding organization. Development and use of the system is explained, and examples of output from 2 field tests is presented. Further system development plans are examined.
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Category :
Languages : en
Pages : 14
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Book Description
This paper details a prototype personal computer based organizational evaluation system that allows a shipyard to evaluate its potential for technological innovation against a composite innovative organization. The system was developed by a combination of metaanalysis of available literature, interviews, and survey of shipbuilding industry personnel. The system is designed for self use by organizational members, and produces output that serves as basis for dialogue about changes necessary to increase the innovative capacity of a shipbuilding organization. Development and use of the system is explained, and examples of output from 2 field tests is presented. Further system development plans are examined.
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Languages : en
Pages : 12
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This paper reports on the on-going development of an object-oriented CAD system at the Advanced Computer Laboratory for Shipbuilding at the University of New Orleans. It describes: the reasons for object-oriented (yard specific) development; the computer-aided software development environment; the developing class structure of the ship structures design application; and the planned developments within the CAD system and integration of packages to support visualization, planning and enterprise management and electronic data interchange.
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Languages : en
Pages : 10
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This paper describes a unique software program that simulates the dynamic complexities of the ship construction process. The program called ShipBuild, was developed by Decision Dynamics, Inc. (DDI) under a Small Business Innovation Research (SBIR) contract sponsored by NAVSEA. The program greatly simplifies the planning and replanning process, making it easy to create a good production plan and keep it current. This simulation model of the shipyard production process captures both the essential physical shipbuilding activities and the essential management decision-making activities that support the physical production processes. The application consists of two independent submodels, a simulation capability and results viewer component. The first submodel identifies the overall shipyard facility and manpower resources and the second identifies the construction tasks required to build a ship. the submodels interact to calculate the specific allocation of resources over time necessary to produce the ship. The output generated from the program provides the durations and manhour loadings of elements of the ship construction process based upon dynamic resource availability. The output (unlike other scheduling programs for which durations are typically input and resource allocations an output) provides both schedule and resource use. Task durations are calculated based upon the manhour requirements, the number of people assigned and their productivity. Output generated by the application can assist Program Managers and Design Engineers in analyzing the manhour cost and schedule impacts of alternative designs and construction sequences. The program can also help to quantify the cost and schedule impact of delay and disruption as well as assist in identifying the most effective management actions to overcome such problems.
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Languages : en
Pages : 25
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This paper provides an introduction to the application of commercial off the shelf (COTS) and PC based simulation and visualization software in the ship production and maritime environment. It is intended to assist the shipyard manager, production engineer, naval architect and marine engineer in identifying simulation and visualization opportunities in the areas of production, project management, training, design, and port evaluation for vessel loading/unloading times. the desired features of simulation and visualization software for maritime applications are discussed, and a sample listing of both maritime and non-maritime simulation efforts is provided. In addition to this general discussion, two projects which utilize these technologies are described.
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Languages : en
Pages : 30
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The paper discusses a number of facets of Computer-Aided Ship Design and Construction (CASDAC) in which the writer has been involved. A brief history of computers in the Navy is given, some notes on the CASDAC project, the flavor of two recent programs, Navy planning and philosophy in detail design. and construction, some notes on the Computer-Aided Piping Design and Construction (CAPDAC) project, and finally some notes on the increasingly important role of computer science. The U.S. Navy has a long history in the use of computers in shipbuilding. In May 1944 the first computer came into operation at Harvard, the Automatic Sequence Controlled Calculator -- the Harvard Mark I. This was designed and constructed by Professor Howard Aiken -- at that time a Commander in the United States Navy. It was the Bureau of Ships which first sponsored the operation of this calculator and some of the first problems attacked originated from the Bureau. In 1952, the Applied Mathematics Laboratory was established at the now David W. Taylor Naval Ship Research and Development Center (DTNSRDC) to initiate computer service to the Navy. For this installation the Univac's 6th computer was installed in 1953. Early work included shaft vibrations, shell stiffening, propeller design, underwater sound intensities, pipe stress analysis, and nuclear reactor design. Within a year, this computer was operating around the clock. By 1958, clients included personnel from the naval shipyards processing programs associated with their ship construction program. By 1960 naval shipyards possessed their own computers and programs were in operation for tank capacity tables, hull deflection, voltage drop, shock mounts, sound isolation, mast calculations, weights and moments, propulsion shaft bearing reactions, pipe bend calculations and pipe stress analysis.
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Languages : en
Pages : 21
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For many years, the U.S. Navy fleet has experienced severe corrosion and erosion problems in copper nickel seawater piping systems. Since titanium is extremely resistant to corrosion and erosion, it has been viewed as a potential solution to these problems. However, certain concerns regarding shipboard use of titanium needed to be addressed: marine fouling, galvanic action with other metals, welding, system fabrication in a normal shipyard environment, testing, and life cycle costs. Over a three year period, Ingalls Shipbuilding division of Litton Industries and the Naval Surface Warfare Center, White Oak, worked with various commercial equipment suppliers to address these concerns. Partially because of the success of this project, it was decided to retrofit titanium systems aboard TARAWA Class LHAs and to specify same for the new LPD 17 Class ships.
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Languages : en
Pages : 11
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A problem in modular shipbuilding is the lack of a reliable, low cost method of obtaining and utilizing dimensional control in 3D. Photogrammetry has been successfully used as a tool for this application, but because of the large number of systematic errors associated with film-based cameras, only very large shipyards are using this. Recently, developments in Charge Coupled Device (CCD) imaging arrays for cameras have allowed some success in applying photogrammetric techniques in dimensional control. Main stream photogrammetric software and hardware configurations have been expensive and complicated. Digital camera systems and computers were purchased and programmed to tie existing inexpensive software packages with Geometric Dilution of Control (GDOP) error propagation analysis, originally designed for topographic mapping, into a tool for production shipyard fabrication dimensional control.
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Languages : en
Pages : 15
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Proceedings of the REAPS Technical Symposium. Paper No. 25: Integrating Shipyard Design and Manufacturing Functions into an Existing CAD/CAM System.
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Languages : en
Pages : 12
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Computer assisted process planning can be a first step toward the integrated use of computers in the design and manufacturing process to improve productivity in batch manufacturing. The key to the process of integration is a part feature recognition method to analyze and retrieve manufacturing processes and arrive at least-cost designs consistently linked to "best" manufacturing processes. Major problems are incompatible computers, software; and people.
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Languages : en
Pages : 15
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In the current severely competitive climate that is challenging shipbuilders everywhere, how information is managed is taking on extraordinary importance. Existing computer aided design (CAD) systems have not been focused on the most critical information needs, for example, information to serve marketing. This limitation is the result of concentrating primarily on aspects of design and manufacturing without regard for impact on an overall manufacturing system. In this paper the need to extend CAD systems is identified so that they would more fully provide critical-data to everyone who has to have understanding of a manufacturing system's capability and availability.
