in 1954 and served with distinction in numerous military assignments during a career that spanned 28 years of commksioned service. He received an M.S. degree in Naval Architecture from Webb Institute of Naval Architecture, an M.S. degree in Financial Management from the George Washington University, and culminated his education at the Catholic University of America from which he received a Doctorate in Ocean Engineering in 1972. A n active member of ASNE since 1966, Capt. Jollgf received the PRESIDENT'S A WARD in 1976and 1978, special recognition from the President of the Society in 1979 for his six years of continuous service as
This paper reviews past and present modular ship concepts with a basic thrust toward detailing the latest advances in the state‐of‐the‐art of modular design techniques which are being considered in future developments. A proposed methodology for the evaluation of ship modularity and module category definitions is provided. The crucial issues affecting the use of modularity are discussed, and the benefits and negative aspects of modularity in ship design are summarized. The impact of the modular concept on the ship design process is analyzed and conclusions are drawn as to the concept's technical and economic feasibility.
High power‐density motors and generators and reliable high power solid state motor speed controls make electric drives an attractive contender for naval propulsion systems. This paper presents several modeling techniques and scaling relationships to assist others in estimating the volumes and weights of propulsion generators and motors, solid state power conditioners, electrical switchgear, and associated electrical propulsion system components as functions of propeller shaft power. These modeling and scaling relationships are applied to a specific watercooled conceptual design propulsion plant to demonstrate the scaling method and to present the sizes and weights of “state‐of‐the‐art” components for propulsion systems in the 22 to 52 megawatt (30,000 to 70,000 horsepower) per propeller shaft range. Although the conceptual design discussed reflects watercooled technology, the provided relationships can be used for any given machine or machinery system configuration as long baseline data is available. For the purposes of this paper, some aircooled data is presented and the results compared to a specific watercooled Advanced Integrated Electric Propulsion Plant (AIEPP) design which was presented at ASNE DAY 1982 and published in the April 1982 issue of the Naval Engineers Journal. This paper permits application of the previously published AIEPP technology to a wide range of shaft horsepowers and propulsion plant configurations and thus serves as a major extension of the basic concepts set forth in the April 1982 paper for advanced alternating current electric drive machinery.
Since the advent of the modern combat system and use of sophisticated avionics test equipment, there has evolved an ever increasing problem in interfacing these loads to the normal Type I/Type II shipboard power system. This paper addresses past initiatives which led to a proliferation of motor‐generators in the fleet; the current major interface problems which have led to degraded performance of the ship service power system as well as the systems serviced, and makes recommendations to reverse the incompatibility. In order to ensure that the interface problem is understood, several specific current system problems are described and impending future potential problems assessed. The by‐product of this dialogue should be a better understanding of the interface problems which can occur in electrical and electronic systems and subsystems when early attention is not given to overall ship system design of both the power generation system and mission‐oriented payload systems and subsystems.
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