Organization:
Mechanical Engineering (ME)

orgunit.page.dateEstablished

1952

orgunit.page.dateDissolved

2005

Description

The mission of the Mechanical and Aerospace Engineering department is to provide defense-relevant, advanced education and research programs to meet Naval unique needs, and increase the warfighting effectiveness of the U.S. Naval Forces, DoD and allied armed forces.

Type

Department

Full item page

Publication Search Results

Now showing 1 - 10 of 44

A critical review of the intrinsic nature of vortex induced vibrations
(Monterey, California. Naval Postgraduate School, 2003-06-16) Sarpkaya, Turgut; Mechanical Engineering (ME); Research and Sponsored Programs Office (RSPO); Mechanical Engineering
This is a concise and comprehensive review of the progress made during the past two decades on vortex induced vibration (VIV) of mostly circular cylindrical structures subjected to steady uniform flow. The critical elements of the evolution of the ideas, theoretical insights, experimental methods, and numerical models are traced systematically; the strengths and weaknesses of the current state of the understanding of the complex fluid/structure interaction are discussed in some detail. Finally, some suggestions are made for further research on VIV. The organization of the paper is given at the end of the next section.
Design and evaluation of a Differential Global Positioning System (DGPS) for the NPS Autonomous Underwater Vehicle (AUV)
(Monterey, California. Naval Postgraduate School, 1999-08) Piton, Gwladys; Mechanical Engineering (ME); Research and Sponsored Programs Office (RSPO); Mechanical Engineering
Accurate underwater positioning remains an important challenge to AUV researchers. Recent development of Differential Global Positioning System (DGPS) embedded in an AUV proved the capability of DGPS fixes to reduce the position error. By surfacing regularly, the AUV takes DGPS fixes and integrates them for position estimation. The purpose of this study is to develop a low-cost DGPS for the NPS AUV. To match mission requirements, the system is designed such that the differential receiver and the GPS receiver are two independent stations using radio modems to communicate. Local experimental testing showed that this system can yield positions within one to five meters accuracy.
Submarine-installed machinery monitoring and diagnostics: A state-of-the-art review
(Monterey, California. Naval Postgraduate School, 1990) Robinson, John D.; Rossano, Graham W.; Shin, Y. S.; Mechanical Engineering (ME); Research and Sponsored Programs Office (RSPO); Mechanical Engineering
This state-of-the-art review identifies and discusses existing methods and techniques of machinery monitoring and diagnostics applicable to submarine-installed machineries, their limitations, and base-technology needs. Also included are discussions of machinery monitoring and its concept, condition monitoring and diagnostics techniques, machinery maintenance programs, vibration monitoring techniques and the current practice in U.S. Navy machinery vibration monitoring programs. The main objective is to provide the basis for research and development of future needs in this area.
A computer subroutine for stress analysis of rotating, heated disks
(Monterey, California. Naval Postgraduate School, 1978-05) Brock, John E.; Brown, Robert E.; Mechanical Engineering (ME); Mechanical Engineering
This report gives listing and instructions for using a digital computer subroutine for finding stress distribution in a thin rotating disk with nonuniform heating; the problem is axisymmetric. An iterative method is used. Theoretical background is given.
COPES - A FORTRAN Control Program for Engineering Synthesis
(Monterey, California. Naval Postgraduate School, 1982-03) Madsen, Leroy E.; Vanderplaats, Garret N.; Mechanical Engineering (ME); Mechanical Engineering (ME)
A FORTRAN COntrol Program for Engineering Synthesis (COPES) has been developed for solving engineering design problems. The program maximizes or minimizes a numerically defined objective function subject to a set of inequality constraint functions. COPES uses the optimization program, C0NMIN, which includes the conjugate direction method of Fletcher and Reeves for unconstrained function minimization and a modification of Zoutendijk's method of feasible directions for constrained function minimization. Additionally, approximation techniques are available for use in optimization, and trade-off studies may be performed. A simple design example demonstrates the program capabilities. Programming guidelines are presented followed by sample input data and output for each program option.
Rule Based Design Optimization of Cradle Structures Using Frequency Domain Structural Synthesis
(Monterey, California. Naval Postgraduate School, 1993-12-31) Gordis, Joshua H.; Healy, Anthony J.; Cook, Ronald E.; Mechanical Engineering (ME); Mechanical Engineering
This work investigates the use of frequency domain structural synthesis and an expert system rule based design methodology for automating the design of the submarine machinery cradle. The expert system provides 'intelligent' automated executive control of the design process. Frequency domain structural synthesis provides the means to rapidly alter the structural configuration of the cradle design and calculate dynamic response. The goal is the minimization of structural dynamic transmissibility.
Stress analysis of thermowells
(Monterey, California : Naval Postgraduate School, 1974-11-11) Brock, John E.; Mechanical Engineering (ME); Mechanical Engineering
This monograph examineB the mechanical-structural integrity of thermowells to sustain pressurization and excitaticn:s due to fluid flow. Suggested design criteria, which ~re shown to be conservative, are more inclusive than currently employed criteria, and in one tmportant aspect, namely with respect to pressurization, are more liberal.
AMPHIB: a users manual
(Monterey, California. Naval Postgraduate School, 1993) Mukutmoni, Devadatta; Kelleher, Matthew D.; Joshi, Yogendra.; Mechanical Engineering (ME); Mechanical Engineering
A general purpose three-dimensional code (AMPHIB) that solves electronic cooling problems is documented. In its present structure, the code is set up for computations in liquid immersion cooling of an m by n array of chips embedded in a substrate in a three-dimensional rectangular enclosure. Nevertheless, it can be modified to solve problems in forced, mixed and natural convection for a wide range of boundary conditions. The subroutines and the input are described in detail. A listing of the code and sample example problems are also included.
Modal analysis of the 72 Inch TAC-4 Ruggedized Rack (CLIN 0003AA)
(Monterey, CA; Naval Postgraduate School, 1997-09) Oesterreich, Mark H.; Shin, Y. S.; Mechanical Engineering (ME); Naval Postgraduate School (U.S.); Mechanical Engineering
The finite element modeling and subsequent static and modal analyses of the 72 inch TAC-4 Rugged Rack computer system (CLIN 0003AA), as designed by Science Applications International Corporation (SAIC), has been performed to determine the natural frequencies and corresponding mode shapes for subsequent transient shock analysis. This rack is designed to allow incorporation of commercial-off-the-shelf (COTS) computer systems for naval tactical computing requirements while still meeting applicable shock and vibration mil-specs
Modal Analysis of a GA Superconducting Magnet Subsystem for ALISS
(Monterey, California. Naval Postgraduate School, 1997-04) Lee, M.; Mechanical Engineering (ME); Mechanical Engineering
The modal analysis of a superconducting magnet subsystem designed by General Atomics (GA) has been performed to determine the natural frequencies and corresponding mode shapes. GA subsystem is a part of ALISS (Advanced Lightweight Influence Sweep System), which uses a superconducting magnet for magnetic mine sweeping. Any resonance condition must be avoided in an operational environment to ensure the no-quenching in the subsystem.