Thesis: M.S., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1962 / Includes bibliographical references (leaf 70). / by Donald J. Sabat and Maftoon Ahmed. / M.S. / M.S. Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering

No description available.

Thesis: Nav. E., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1959 / Includes bibliographical references (leaves 94-96). / by Richard B. Brooks, Robert T. Clark, Carols Quiñones Lopez. / Nav. E. / Nav. E. Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering

Thesis: B.S., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1899 / by William Stark Newell. / B.S. / B.S. Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering

This thesis presents the results of a naval architecture analysis of the Civil War Ironclad CSS Virginia, built by the Confederate States Navy to break the Union Blockade of Hampton Roads, and which famously engaged the USS Monitor on the second day of the Battle of Hampton Roads, March 9th, 1862. The purpose of the analysis was to examine the ship from a naval architectural standpoint pertaining to hydrostatics, stability, weight and center of gravity, sea keeping, and basic resistance/powering requirements. The overall objective was to see if the story of the CSS Virginia, destroyed on May 11th, 1862 by its own crew to keep it from falling into Union hands, could have ended differently with an attack on Washington, a northern city such as New York or Boston, or a run to a friendly Southern port such as Savannah or Charleston. Paramarine software was used to build a geometry model based on lines included in a book by Sumner B. Besse for ship modelers. The geometry model provided the basic measures of displacement for the hull form at a draft of 21 ft forward and 22 ft aft which in turn allowed for a weight estimate to be undertaken. The goal of the weight estimate was to obtain, in particular, an estimate for the VCG of the vessel. It also allowed for gyradius calculations based on the resultant weight distribution to be calculated. Historical information coupled with the Paramarine geometry was used for the weight analysis. Paramarine was used to obtain Random Amplitude Operators (RAOs) for a sea keeping analysis and long term effectiveness ratings considering MSI and Deck Wetness criteria were obtained based on statistical wave data from NOAA taken from stations in the Chesapeake Bay and in the Atlantic, 64 miles east of Virginia Beach. A NAVCAD analysis was made for resistance requirements, though any resistance analysis of such an antiquated hull form that is also in its way unique has large uncertainties associated with it. The results of the analysis shed some light on the CSS Virginia and its history. The hydrostatic analysis leads one to speculate that draft reduction efforts made to allow the Virginia to escape Union capture by sailing up the James River were known to be hopeless, but undertaken anyway to save the honor of those involved and shift blame for the loss of the ship elsewhere. The resistance and powering analysis suggests that an upper speed of 6 knots was probably not outside the CSS Virginia's capabilities. Speeds much higher seem unlikely. The only way to know more would be to get better estimates of power provided by the ship's steam engines and do a tow tank test of a ship model. Assuming a speed of 6 knots and based on a coal consumption rate, it was found that range of the CSS Virginia was at best around 614 nautical miles, giving it the distance to attack New York or sail to Charleston or Savannah. However, the sea keeping analysis shows that the Virginia was very much at home on the relatively calm waters of the Chesapeake Bay, but would have run great risks in sailing on the open sea either to attack a Northern city or make a run to the South for safer waters to fight another day. The officers of the Virginia felt that the ship was likely to flounder; based on the deck wetness criteria chosen for the sea keeping analysis their professional judgment was correct. Details of the weight analysis and a full set of RAOs are provided in the Appendices. / Master of Science

The total cost of ownership of a naval ship is largely influenced by decisions made during concept design. In recent years the US Navy has undertaken numerous initiatives to reduce total ownership cost. This has prompted particular interest in reducing manning, as this is the largest single expenditure in total ownership cost. Normally ships are designed and then a study is performed to determine their required manning, but manning has a significant design impact and designs can either be too small to accommodate necessary manning or too large and costly if manning is overestimated. Manpower analysis implemented early in the design process and included in design synthesis could significantly minimize total ownership cost while optimizing ship design performance. The Department of Aerospace and Ocean Engineering at Virginia Tech has developed a Multi-Objective Genetic Optimization process to aid in ship concept exploration. This thesis describes a manning model created to be incorporated into this ship synthesis and optimization. DDG-51 guided missile destroyer manning is used as a baseline for a guided missile destroyer (DDGx) concept exploration. ISMAT (Integrated Simulation Manning Analysis Tool) discrete event manning tool is used to decompose complex ship operations into functions and tasks to build scenarios and assign crewmembers to accomplish maintenance and ship operations and ultimately calculate manning requirements as a function of ship mission, system, size, automation and maintenance strategy. The manning model results are then linked to the ship synthesis model and design optimization to determine an estimated crew number for a particular ship design. This thesis demonstrates that a manning estimation tool can effectively be linked to a naval ship concept exploration process and have a significant impact on selected designs. / Master of Science

This thesis presents a process and tool that generates representative preliminary ship models and arrangements for use in vulnerability analysis in the Concept and Requirements Exploration (CandRE) process used at Virginia Tech. CandRE uses a Multi-Objective Genetic Optimization (MOGO) to explore the design space for non-dominated ship design solutions based on design effectiveness, risk, and cost. Vulnerability is assessed as part of the CandRE using a Preliminary Arrangements and Vulnerability (PAandV) model. Representative ship arrangements for specified combinations of ship system options are created based on operability needs, ship mission needs, and improved vulnerability. These are then analyzed for vulnerability and are used to calculate a representative Overall Measure of Vulnerability (OMOV) which is used to calculate the Overall Measure of Effectiveness (OMOE) in the MOGO. / Master of Science

Thesis: M.S., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1945 / Bibliography: leaf 83. / by Lyle B. Ramsey and John P. Latimer. / M.S. / M.S. Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering

Thesis: M.S., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1936 / Includes bibliographical references (leaves 59-60). / by James Augustus Sweeney. / M.S. / M.S. Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering

Orientador: Francisco Eduardo Alves de Almeida. / Dissertação (mestrado) - Escola de Guerra Naval, Programa de Pós-Graduação em Estudos Marítimos (PPGEM), Rio de Janeiro, 2016. / Graduação em Estudos Marítimos (PPGEM), Rio de Janeiro, 2016. / Bibliografia: f. 185-205 / O objetivo desta dissertação é averiguar se a existência do navio-aeródromo (NAe) e da aviação embarcada é compatível com a Estratégia Naval Brasileira atual. O foco do texto está nos NAe capazes de operar com aeronaves de asa fixa, mas este também mencio / The objective of this thesis is to investigate whether an aircraft carrier and carrier-based aircraft are compatible with the current Brazilian naval strategy. The focus is on carriers capable of fixed-wing aircraft operation, but big-deck amphibious assa / Made available in DSpace on 2018-02-14T18:06:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2016. Added 1 bitstream(s) on 2019-02-13T19:30:13Z : No. of bitstreams: 1 00001567.pdf: 3188533 bytes, checksum: 8d379fae5673b0d6364b31a3b93bc4a6 (MD5)