This paper presents an integrated approach to computer-Aided Ship Design for U.S. Navy preliminary and contract design. An integrated Hull Design System (HDS), currently under development by the Hull Group of the Nava...
This paper presents an integrated approach to computer-Aided Ship Design for U.S. Navy preliminary and contract design. An integrated Hull Design System (HDS), currently under development by the Hull Group of the Naval Sea Systems Command (NAVSEA 32). is the vehicle for the discussion. This paper is directed toward practicing ship design professionals and the managers of the ship design process. Primary emphasis of this paper, and of the development effort currently under way, is on aiding ship design professionals in their work. Focus is on integration and management control of the extremely complex set of processes which make up naval ship design. The terminology of the Ship Designer and Design Manager is used. The reader needs no familiarity with the technologies of computer science.
Since the signing of the Contract Design Plane for the CVN 68 (the U.S. Navy's latest Class of Aircraft Carriers) In 1963, considerable technological advances have been made in Naval Ship Design. This paper provid...
Since the signing of the Contract Design Plane for the CVN 68 (the U.S. Navy's latest Class of Aircraft Carriers) In 1963, considerable technological advances have been made in Naval Ship Design. This paper provides specific examples of how new technology has affected traditional Carrier design practices and techniques, and also indicates areas where future advanced technology will be needed. It is divided into four sections: 1) computer Design Application; 2) Total Ship Energy Conservation Analysis; 3) Advances in Structural Design; and 4) Impact of V/STOL Aircraft. The increased use of the computer to define ship characteristics in the initial stage of ship design is discussed, followed by a report on efforts to include energy conservation as an integral part of the design process. The energy conservation approach uses traditional analytical techniques to develop innovative design configurations that will achieve energy savings. Of the many advances in Carrier structural design, two specific examples are given: 1) Elimination of the infamous “knee-knockers” (high sills in passageway openings) common to Gallery Deck structure, and 2) Successful attempts at reducing the thickness of aircraft elevator platforms. The paper concludes by pointing out some possible challenges facing the ship designer and some of the technology already created by the expected introduction of advanced design Vertical/Short Takeoff and Landing (V/STOL) aircraft.
作者：
RAWAT, Pwho began his education in his native India
received a Bachelor of Technology degree with honors from the Indian Institute of Technology in 1957. His subsequent education includes S. M.‘s in Industrial Management and Naval Architecture & Marine Engineering from M. I. T. in 1961 and a professional degree in Naval Architecture from the same institution in 1965. Rawat's career began as a Naval Architect in preliminary design with the Hamburg firm of Howladtswerke in 1958. A year later he performed as a research assistant in M. I. T.'s School of Industrial Management for a Ford Foundation Project for a top management training program for India. After this two-year period he acted as the head of the Department Head of Engineering at the Ghana Nautical College in West Africa until 1963. He returned to M. I. T. afterwards to work as a research assistant in Naval Architecture on structural optimization programs. From 1965 to 1966 he filled the capacity of Naval Architecture with M. Rosenblatt & Son in the area of structural design on such projects as MOHOLE AGOR 14 and Catamaran Hull. Since 1966 Rawat has been working in various capacities with Litton Industries: Senior Naval Architect on the FDL Project Section Manager of Hull Structures for the LHA and DD Projects
and his present position as Section Manager for Computer Aided Ship Design.
Many useful conclusions can be drawn if hull structural design is considered as a system. Proper definition of system objectives enables setting up of meaningful long range and intermediate goals. Current state-of-art...
Many useful conclusions can be drawn if hull structural design is considered as a system. Proper definition of system objectives enables setting up of meaningful long range and intermediate goals. Current state-of-art in systems engineering is such that the system objectives can be denned in mathematical form. This provides meaningful scales for progress measurement. The engineering function is to meet the goals set by systems engineering. The state-of-art in engineering has a considerable impact on the definition of system objectives. In recent times we have made considerable progress in developing analytical techniques. Many interesting conclusions result from our experience in using the analytical tools in an iterative manner for design. By using relatively simple algorithms for iteration the analytical processes can be sequenced in such a manner that optimum solution is guaranteed even under a large and complex set of design constraints. Use of computers makes it possible to generate the scantlings using iterative approach with such speed that many important structural configuration decisions can be made by means of thorough parametric analyses. The system objectives therefore are very different in scope today and they should be further modified as technology advances. There are several problems that can be recognized and solved in the systems context. Smooth man-machine operation is an example of this.
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