Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Engineering--Mathematical models"”.
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Pré e pós-processamento gráfico para análise global de risers e linhas de ancoragem
… is the result of the combination of Offshore Engineering and Computational Engineering knowledge ainnning to produce a group of pratical and efficient tools for the analysis of structural components used offshore by the petroleum industry. The engineering mathematical models used in this work, …
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EFFICIENT SOLUTION METHODS FOR NONLINEAR FINITE ELEMENT ANALYSIS (DESIGN, GEOMETRIC MATERIAL, POST-BUCKLING, STRUCTURAL, MECHANICS, NUMERICAL).
Solution algorithms are developed for the nonlinear finite element equations, resulting from the discretization of governing incremental equations of equilibrium. The equations of equilibrium in the total Lagrangian formation are derived, based on continuum mechanics principles and by invoking the …
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Mathematical modeling of urban water management strategies
The rapid expansion of many western urban centers has nearly outstripped available stream, flow and groundwater re-sources requiring municipal water departments to initiate exhaustive searches for new water supplies. Among the most feasible alternatives being investigated to date are acquisition …
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Closed form solution of the wave equation for piles
This thesis details the research into the one-dimensional wave equation as applied to piles used in the support of structures for civil works and driven using impact equipment. Since the 1950's, numerical methods, both finite difference and finite element, have been used extensively for the …
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Developments in the Extended Finite Element Method and Algebraic Multigrid for Solid Mechanics Problems Involving Discontinuities
In this dissertation, some contributions related to computational modeling and solution of solid mechanics problems involving discontinuities are discussed. The main tool employed for discrete modeling of discontinuities is the extended finite element method and the primary solution method …
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Quantifying uncertainty in reliability block diagrams
Reliability analysis yields statistically derived technical system performance estimates. Traditional reliability analysis employs classical statistical techniques predicated upon asymptotic properties of large data sets. Not uncommonly, however, medium to small data sets constrain analysis efforts …
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Three-dimensional finite element modeling of two-phase fluid flow in deformable naturally fractured reservoirs.
The developed theoretical formulation and numerical model are validated against several cases where the analytical solutions or other model results are readily available. The performance of the numerical code is tested first by a couple of decoupled cases: elasticity and steady-state flow. The …
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Finite difference modeling of oil recovery by waterflooding using horizontal well injectors
Waterflooding is the most commonly used injection method for secondary recovery of oil reservoirs. The selection of a horizontal well or a vertical well as an injector is an important issue in waterflooding because these two types of wells can behave differently due to their orientation in the …
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Comparison of asset pricing models using Icelandic stock data
… follows a compound Poisson process. These two models were compared and their accuracy in simulating real world data was assessed through graphs and numbers. The main tools of the comparison were the density function outcome, and the skewness and kurtosis, according to the models. The outcome of …
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Development of First-Year Engineering Teams' Mathematical Models through Linked Modeling and Simulation Projects
<p>The development and use of mathematical models and simulations underlies much of the work of engineers. Mathematical models describe a situation or system through mathematics, quantification, and pattern identification. Simulations enable users to interact with models through manipulation of …