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.
Results
Showing 1 to 11 of 11 for “"Estruturas offshore"”.
-
Transporte de estruturas offshore sobre balsa
This work deals with the structural behaviour of offshore structures like jacket and deck during transportation on deck barges. Initially, a theoretical basis related to this kind of problem is presented. The analyses, founded in a probabilistic theory, were performed considering 5 sets of …
-
Alguns aspectos da análise dinâmica de estruturas offshore
… deals with the Deterministic Dynamic Analysis of Offshore Structures, by the: - Frequency Response Method; - Direct Integration Method. A study was done trying to identify the basic problems in order to make certain simplifications. These producted a better computacional efficiency. A …
-
Análise da resposta de estruturas offshore submetidas à ação do mar
In the present work, the offshore structures response is analyzed using different theories and techniques for wave action. The aspects relative to the soil-foundation interaction problem, including their non linear characteristics, are discussed. A computational procedure, taking into account the …
-
Modelo simplificado para análise de lançamento de estruturas offshore tipo jaqueta
ln the analysis of Fixed Offshore Platforms, usually the study of the launching process is performed on the final pass of the project. The standards do not stablish the conditions for this analysis. Thus the designer should proceed is based on his own experience and/or in model test results. The …
-
Geração automática de dados para análise de juntas tubulares de estruturas "offshore"
The evaluation of localized stress in offshore structure tubular joints is of great importance and interest. The Finite Element Method is used to stress analysis but the non-automatic mesh generation of relatively complex configurations is extremely hard and subject to errors. The automatic …
-
Legado de riqueza: um ensaio sobre governança familiar e organização patrimonial
… ao longo das gerações. A análise se inicia pelas estruturas históricas — morgados, fideicomissos e fee tails — evidenciando como diferentes famílias, em distintos períodos, protegeram seus bens diante de conflitos internos e pressões externas de natureza fiscal, política e econômica. Em seguida, …
-
Análise crítica de um modelo fenomenológico de vibrações induzidas por vórtices via análise de sensibilidade global e quantificação de incertezas
… and its external flow, being undesirable in the offshore industry. Therefore, phenomenological models continue to be developed and popularised to the prediction of VIV, allowing its low computational time to be explored via global sensitivity analysis (GSA) and uncertainty analysis, which could …
-
Análise de zeros atrasados em unidades offshore
… nearby electric generators buses. In the case of offshore production platforms, the so called asymmetry, along with other specific conditions, may give rise to the so called “delayed current zeros” phenomenon in the short circuit current wave, which in turn, can produce thermal stress in the …
-
Equilíbrio e vibrações induzidas por vórtices de "risers" de perfuração
Presents a study about drilling risers used by semisubmersible platforms in order to drill wells in deep waters. Firstly, a study about static equilibrium is presented. This allows to select adequate risers for places with usual natural conditions. The selection takes into account the riser …
-
Sistemas de proteção para redes de distribuição elétrica submarinas não aterradas
In the offshore world, the need for pumping expansion and subsea processing has been increasing in recent years mainly due to the search for optimization of resources and space in the platforms, in addition, a lot of cases, the subsea pumping is the only feasible of production projects. Thus, in …
-
Interação solo-estaca de plataformas offshore
… to represent soil in the Structural Analysis of Offshore Platforms. The soil characteristics for the non-linear soil behaviour are obtained from laboratory tests or using full scale loaded piles. The API Code through the "P-Y" curves, defines the stress-strain soil characteristics for laterally …