Página 19 dos resultados de 1134 itens digitais encontrados em 0.008 segundos

‣ Estudo de um absorvedor de ondas ativo para tanque didático.; Study of an active wave absorber for didactic wave tank.

Michima, Paula Suemy dos Santos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 10/10/2007 Português
Relevância na Pesquisa
47.18944%
Este projeto trata do estudo para implementação de um sistema de absorção/geração de ondas no Tanque de Provas Didático I do Departamento de Engenharia Naval e Oceânica da Universidade de São Paulo (PNV-EPUSP). As instalações já existentes incluem o tanque de provas, sensores de ondas resistivos e batedor de ondas do tipo cunha. Para a parte física do absorvedor, o sistema do servomotor foi disponibilizado pela MOOG do Brasil Controles Ltda. Dado que as propriedades desses equipamentos foram pré-definidas, os demais componentes foram escolhidos e projetados de acordo com esses parâmetros, levando-se em conta a compatibilidade com as características das instalações e a factibilidade de se adaptar e modificar os componentes para a realização de futuros ensaios com diferentes tipos de ondas. Tais componentes foram construídos com o suporte financeiro da Agência Nacional do Petróleo (ANP). O dimensionamento da placa basculante e a geometria do suporte do pistão são apresentados, bem como as caracterizações de cada item das instalações já existentes e do novo batedor de ondas destinado à absorção. Um algoritmo preliminar de controle é proposto e testado. Como houve a impossibilidade de se encaminhar o teste empírico do controlador no tanque do PNV...

‣ A survey of the generation of ocean waves in a test basin

Nohara,Ben T.
Fonte: The Brazilian Society of Mechanical Sciences Publicador: The Brazilian Society of Mechanical Sciences
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2000 Português
Relevância na Pesquisa
47.235225%
At present stage the analytical design of wave tolerance for floating structures and vessels is still imperfect due to the mutually complex and nonlinear phenomena between structures and waves. Wave tolerance design is usually carried out through iterative evaluations of results from model tests in a wave basin, and this is done in order to reach a final structural design. The wave generation has then become an important technology in the field of the coastal and ocean engineering. This paper summarizes the facilities of a test basin and a wave maker in Japan and also surveys the methodology of the generation of ocean waves in a test basin.

‣ Naval Engineering A National Naval Obligation

Chryssostomidis, Chryssostomos; Bernitsas, Michael; Burke, David
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
Formato: 726191 bytes; application/pdf
Português
Relevância na Pesquisa
47.255996%
As part of its national obligations, ONR must ensure US world leadership in those unique technology areas that insure naval superiority. ONR accomplishes this mission through research, recruitment and education, maintaining an adequate base of talent, and sustaining critical infrastructure for research and experimentation. One critical area requiring support by ONR is the "knowledge infrastructure" in Naval Architecture and Marine Engineering. An innovative knowledge infrastructure in NA & ME consists of two main elements: • People who have the knowledge, skills and experience to perform innovative design and engineering applied to in Naval Architecture and Marine Engineering; and • An industry that employs these people and allows this innovative knowledge to be applied in the ships it designs and builds for the Navy. The universities along with industry develop the technology and educate the people who are employed by industry. In turn, the research supported primarily by the government provides direct support for the conduct of research and the education of the future faculty who perform their doctoral research in this discipline. This study examined the current situation in navy related Naval Architecture and Marine Engineering. The need for ONR support in this area is identified and recommendations made to establish long term support that will provide for the introduction of innovative technology in naval ships. The following are documented in this report to establish this need: (1) The uniqueness of "Engineering for the Marine Environment" is explained. Naval Architecture and Marine Engineering...

‣ A process-based cost estimating tool for ship structural designs

Barentine, John (John Murry)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 229 p.; 19424936 bytes; 19424694 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by John M. Barentine.; Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996.; Includes bibliographical references.

‣ Satellite-derived sea surface temperature, mesoscale variability, and foraminiferal production in the North Atlantic

Wolfteich, Carl Martin
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 91 leaves; 3771649 bytes; 3771454 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Carl Martin Wolfteich.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.; Includes bibliographical references (leaves 67-71).

‣ A combined high-order spectral and boundary integral equation method for modelling wave interactions with submerged bodies

Thomas, Gregory Robert
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 121 leaves; 3283005 bytes; 3282813 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Gregory Robert Thomas.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.; Includes bibliographical references (leaves 116-121).

‣ Development and analysis of panel methods for propellers in unsteady flow

Hsin, Ching-Yeh
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 156 leaves; 7659551 bytes; 7659310 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Ching-Yeh Hsin.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.; Includes bibliographical references (leaves 137-144).

‣ Ship wave patterns and motions by a three dimensional Rankine panel method

Nakos, Dimitris E
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 172 leaves; 12555056 bytes; 12554812 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Dimitris E. Nakos.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.; Includes bibliographical references (leaves 166-172).

‣ Algorithms for rational spline surface intersections

Kriezis, George Anthony
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 263 leaves; 20385115 bytes; 20384872 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by George Anthony Kriezis.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.; Includes bibliographical references (leaves 255-263).

‣ Hybrid Galerkin boundary element-wavenumber integration method for acoustic propagation in laterally inhomogeneous media

Seong, Woojae
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 143 leaves; 9205856 bytes; 9205616 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Woojae Seong.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991.; Includes bibliographical references (leaves 139-143).

‣ Drillstring axial vibration and wave propagation in boreholes

Lee, Hyun Yup
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 167 leaves; 12480527 bytes; 12480288 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Hyun Yup Lee.; Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991.; Includes bibliographical references (leaves 164-167).

‣ An integral turbulent boundary-layer method and the residuary resistance of ships

Martinot-Lagarde, Vincent
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 79 leaves; 4197252 bytes; 4197012 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Vincent Martinot-Lagarde.; Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991.; Includes bibliographical references (leaves 78-79).

‣ Numerical study of fully nonlinear water waves in three dimensions

Xü, Hongbo
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 211 leaves; 14608730 bytes; 14608487 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.18944%
by Hongbo Xü.; Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1992.; Title as it appears in the M.I.T. Graduate List, Feb. 1992: Numerical simulations of fully-nonlinear water waves in three dimensions.; Includes bibliographical references (leaves 203-211).

‣ Residual stresses in weldments in high-strength steels.

Hwang, Jye-Suan
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 122 leaves; 3436984 bytes; 3443698 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.319805%
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Ocean Engineering.; Microfiche copy available in Archives and Engineering.; Includes bibliographical references.

‣ Stresses around neighbouring elliptical holes in flat plates.

Alexandrakis, Alkibiades
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 77, [2] leaves
Português
Relevância na Pesquisa
47.319805%
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Ocean Engineering.; Microfiche copy available in Archives and Engineering.; Includes bibliographical references.

‣ Normalized mechanical properties of resedimented Gulf of Mexico clay from Integrated Ocean Drilling Program Expedition Leg 308

Mazzei, David P. C. (David Peter Clark)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 137 leaves
Português
Relevância na Pesquisa
47.319805%
During Integrated Ocean Drilling Program (IODP) Expedition Leg 308, many Whole Core Samples were recovered from the Ursa Basin in the Gulf of Mexico. Post-cruise geotechnical testing found these samples to be highly disturbed due to the sampling process. This research will determine mechanical properties of laboratory Resedimented samples created using recovered Leg 308 sediment. A seven triaxial compression tests, Ko consolidated, were performed to ascertain these mechanical properties as a function of consolidation stress. Consolidation stress for these specimen ranges from 150 kPa up to 1,200 kPa. Axial strain induced on the soil during laboratory consolidation was approximately 60%. Results show that with an increase in Ko values there is a decrease in undrained shear strength, which is in accord with research completed on resedimented Boston Blue clay (RBBC) at MIT and also intact material that was recovered from this expedition. Undrained shear strength of the material is between 0.24 and 0.27, which is weaker than what is expected, according to SHANSEP. Friction angle of the material ranges from approximately 220 to 260. There is not any apparent relationship between Ko and modulus, friction angle or consolidation stress. Reaching end of primary proved to be a difficult task...

‣ Estimation of sea surface wave spectra using acoustic tomography

Miller, James Henry, 1957-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 172 p.
Português
Relevância na Pesquisa
47.319805%
by James Henry Miller.; Thesis (Sc. D.)--Joint Program in Oceanographic Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 1987.; Bibliography: p. 164-171.; Vita.

‣ Study of the transient heave oscillation of a floating cylinder.

Itō, Sōichi
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 81 leaves
Português
Relevância na Pesquisa
47.319805%
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1977.; Microfiche copy available in Archives and Engineering.; Includes bibliographical references.

‣ Scattering of acoustic energy from rough deep ocean seafloor: A numerical modeling approach

Robertsson, Johan Olof Anders
Fonte: Universidade Rice Publicador: Universidade Rice
Português
Relevância na Pesquisa
47.311265%
The highly heterogeneous and anelastic nature of deep ocean seafloor results in complex reverberation as acoustic energy incident from the overlaying water column interacts and scatters from it. To gain a deeper understanding of the mechanisms causing the reverberation in sonar and seafloor scattering experiments, we have developed numerical simulation techniques that are capable of modeling the principal physical properties of complex seafloor structures. A new viscoelastic finite-difference technique for modeling anelastic wave propagation in 2-D and 3-D heterogeneous media, as well as a computationally optimally efficient method for quantifying the anelastic properties in terms of viscoelastic mechanics are presented. A method for reducing numerical dispersion using a Galerkin-wavelet formulation that enables large computational savings is also presented. The widely different regimes of wave propagation occurring in ocean acoustic problems motivate the use of hybrid simulation techniques. HARVEST (Hybrid Adaptive Regime Visco-Elastic Simulation Technique) combines solutions from Gaussian beams, viscoelastic finite-differences, and Kirchhoff extrapolation, to simulate large offset scattering problems. Several scattering hypotheses based on finite-difference simulations of short-range acoustic scattering from realistic seafloor models are presented. Anelastic sediments on the seafloor are found to have a significant impact on the backscattered field from low grazing angle scattering experiments. In addition...

‣ Optimizing the selection and implementation of assembly line equipment at a large automobile original equipment manufacturer

Holman, Cale M. (Cale Matthew)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 97 p.; 6372789 bytes; 6376854 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
47.319805%
Toyota Motor Manufacturing North America (TMMNA) is continuing to face an increasingly competitive automobile market. To meet these evolving market conditions, TMMNA has experienced rapid growth in demand for its automobiles in North America. To meet this demand, Toyota has rapidly grown from three assembly plants in the mid- 1990's to its current total of six assembly plants (five in operation with one being built). This has led to many management challenges, including communication, knowledge sharing, and knowledge retention that many companies experience when faced with rapid growth. In order to respond to these challenges, Vehicle Production Engineering (VPE) Assembly, a department within TMMNA, has attempted to develop a process through which it can standardize its processes and capitalize on best practices across the many North American plants. This thesis studied the process through which VPE Assembly develops and installs assembly line equipment for major automobile model changes. This study included observation of the Toyota product development process and how this process is carried out within VPE Assembly. This research revealed that the assembly line equipment process employed by Toyota is well suited for this organization. However...