Ocean Engineering Commons^™

Integration Of Process Parameter Control And Digital Image Correlation Methods In An Investigation Of The Variability Of Marine Polymer Matrix Composite Material Properties, Keith Andrew Berube

Electronic Theses and Dissertations

The very nature of continuous fiber composite materials, with their heterogeneous structure of layered and interwoven fibers bound together by a polymer resin matrix, lead to an inevitable variability in mechanical properties. This is especially true if the fabrication process is not well controlled. Unlike fabricating components with metals, where the properties of the material are known beforehand, the final properties of the composite material are determined during the process of fabricating the composite part. The research described herein was undertaken to better enable the use of polymer matrix composites in the marine construction industry by developing a knowledge base …

Absorber Geometry Optimization For A New Wave Energy Converter, Rachel A. Durren

Masters Theses

Alternative energy technologies are on the forefront of research due to the rising costs of oil and natural gas. One relatively under development source of energy is ocean waves. In order to make the use of ocean waves economically viable, the amount of energy absorbed by wave energy converters (WEC) must be optimized. The research within presents a new conceptual design, "Aqua Fly", for a WEC with emphasis on maximizing the amount of energy absorbed. The energy absorption component of the "Aqua Fly" was isolated and a small scale 2-D study of energy absorption. First, the amount of energy in …

Re-Evaluation Of Resistance Prediction For High-Speed Round Bilge Hull Forms, Jae Won

Theses and Dissertations

Predicting the resistance of a high-speed monohull has been of interest to Naval Architects for several decades. Even though considerable amount of research has been carried out in this area, there remains a degree of uncertainty in the accurate resistance prediction in the early design stage. This research thesis attempts to investigate a method for enhancing the accuracy of resistance prediction methods for high-speed round-bilge monohull form vessels for a wide range of volumetric Froude numbers (Fn). While a number of systematic series are in existence, their data are either not readily available or scattered in various internal reports and …

Numerical Modeling Of Lifting Flows In The Presence Of A Free Surface, Leonardo R. Carmona Vasquez

University of New Orleans Theses and Dissertations

This thesis work started as an attempt to create a computational tool to model hydrodynamics problems involving lifting flows. The method employed to solve the problem is potential flow theory.

Despite the fast evolution of computers and the latest developments in Navier-Stokes solvers, such as the Ranse methods; potential flow theory offers the possibility to create or use existing computational tools, which allow us modeling hydrodynamics problems in a simpler manner. Navier-Stokes solver can be very expensive from the computational point of view, and require a high level of expertise in order to achieve reliable models.

Based on the above, …

Correlation Of Shear Strength Between Longitudial And Transverse Specimens, Erasto A. Fernandez

University of New Orleans Theses and Dissertations

In this thesis, new methods for shear strength are proposed and backed up through extensive experimentation, ABAQUS models and data analysis of Titanium welds of three different alloys. The results are compared with those obtained by using the procedure outlined by AWS B4 for calculating Shear Strength in the transverse and longitudinal directions; this equation is widely used by the American Welding Society (AWS) and all those in search of more efficient designs involving welding.

It is a well-documented issue that the equation provided by AWS yields a large discrepancy between the values for shear strength of longitudinal and transverse …

The Modified Coastal Storm Impulse Parameter, Sayed Gholamreza Mahmoudpour

Civil & Environmental Engineering Theses & Dissertations

The correlation of the morphological changes to the coast and storm characteristics is among interests of coastal engineers. Better understandings of a storm's potential forces ultimately lead engineers to safer designs and minimize the damages. Therefore, a need to quantify the storm potential forces to a storm parameter is evident. The desired storm parameter is to consider all the relative physical factors and is to present realistic results that then can be proven by actual nature response.

The concept of Coastal Storm Impulse (COSI) parameter was first introduced by Basco and Klentzman (2006) and is based on the conservation of …

Evaluation Of Ocean-Energy Conversion Based On Linear Generator Concepts, Michael Allen Stelzer

Electrical & Computer Engineering Theses & Dissertations

A turbine generator is a device that converts mechanical rotation into electrical energy. Unfortunately, the primary driving force that has been used to provide this rotation has, thus far, been fossil fuels. Although fossil fuels have proven to be a reliable resource to continually supply the growing demand for electrical power, they are not without their financial and environmental drawbacks. With the continuously increasing demand for energy, it is hypothesized that the world may, in time, exhaust this precious natural resource and/or inflict permanent environmental damage upon our planet.

However, motions that occur in nature, such as ocean waves, can …