Offshore Structures
Mostrando 1-12 de 40 artigos, teses e dissertações.
-
1. EVALUATION OF THE CHEMICAL COMPOSITION AND STRUCTURE OF ASPHALTENES FROM THREE OFFSHORE BRAZILIAN BIODEGRADED HEAVY OILS
Asphaltenes fractions were extracted and purified from three heavy Brazilian oils. Their mass compositions of C, H, N, Ni and V were obtained from elemental analysis and S and O atomic percentages from EDS. The H/C ratios showed high degree of unsaturation, while the O atomic percentages indicated more pronounced biodegradation effects on two samples. Quanti
Quím. Nova. Publicado em: 2021-04
-
2. Ultimate bending capacity of aged fixed platform by considering the effect of marine fouling
Abstract For offshore structures, especially jacket supported structure such as fixed platform and offshore wind turbine, the underwater area provides an ideal site for corrosion formation and marine fouling. In this marine environment, the structures are exposed to particularly aggressive corrosion and colonized by marine organisms involving a diversity of
Lat. Am. j. solids struct.. Publicado em: 27/06/2019
-
3. Protección antiincrustante de estructuras sumergidas mediante recubrimientos formulados con 7-hidroxi-4-metilcumarina
ABSTRACT Biofouling settlement on submerged structures such as ships, buoys, farms, off-shore platforms and meteorological stations induces economic losses as a consequence of material deterioration and withdraw from service. Environmental regulations focus on the use of environmental friendly products to replace metallic biocides included in antifouling pai
Matéria (Rio J.). Publicado em: 19/07/2018
-
4. Numerical Investigation of Structural Response of Corrugated Blast Wall Depending on Blast Load Pulse Shapes
Abstract Hydrocarbon explosions are one of most hazardous events for workers on offshore platforms. To protect structures against explosion loads, corrugated blast walls are typically installed. However, the profiles of real explosion loads are quite different depending on the congestion and confinement of Topside structures. As the level of congestion and c
Lat. Am. j. solids struct.. Publicado em: 2017-09
-
5. Correlation of Stress Concentration Factors for T-Welded Connections – Finite Element Simulations and Fatigue Behavior
Abstract The stress concentration factors (SCFs) in welded connections usually occur at zones with high stress levels. Stress concentrations reduce the fatigue behavior of welded connections in offshore structures and cracking can develop. By using the grinding technique, cracking can be eliminated. Stress concentration factors are defined as a ratio of maxi
Soldag. insp.. Publicado em: 2017-06
-
6. Effect of an Opening on Reinforced Concrete Hollow Beam Web Under Torsional, Flexural, and Cyclic Loadings
Abstract Hollow sections have been increasingly applied in the construction of buildings, bridges, offshore structures, and towers for passing electrical and mechanical pipes or other utilities. Torsion caused by external force is a weakness of hollow sections that is rarely investigated. In particular, the behavior of hollow sections with high-strength conc
Lat. Am. j. solids struct.. Publicado em: 2016-08
-
7. Probabilistic analysis of stress intensity factor (SIF) and degree of bending (DoB) in axially loaded tubular K-joints of offshore structures
Abstract The stress intensity factor (SIF) and the degree of bending (DoB) are among the crucial parameters in evaluating the fatigue reliability of offshore tubular joints based on the fracture mechanics (FM) approach. The value of SIF is a function of the crack size, nominal stress, and two modifying coefficients known as the crack shape factor (Yc) and ge
Lat. Am. j. solids struct.. Publicado em: 2015-11
-
8. Fluidização de solo arenoso associada à injeção de agente cimentante para ancoragem de estruturas offshore / Fluidisation of sandy soils associated to the injection of cementing agent for applying in offshore structures
A instalação de estruturas offshore em grandes profundidades demanda avanços na área da Engenharia, principalmente quanto ao desenvolvimento de novas tecnologias associadas à ancoragem destas estruturas. O objetivo deste trabalho é analisar os mecanismos e conceitos associados à fluidização de solos arenosos com jatos de água, associando a técnica
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
9. Investigação experimental e analítica do escoamento ao redor de cilindro circular com supressores de VIV. / Experimental and analytical investigation of the flow around circular cylinder with VIV suppressors.
The fluid flow around bluff bodies is one of the main problems in fluid mechanics. The investigations of this phenomenon are based on analytical, numerical and experimental techniques. Each technique presents advantages and disadvantages, being impossible the comprehensive characterization of the flow though only one technique for the majority of body geomet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
-
10. Análise da interação solo-estrutura aplicada a riser rígido em catenária através da formulação co-rotacional / Analysis of the soil-structure interaction applied to steel catenary riser using corotational formulation
A explotação de petróleo em ambientes off-shore possui inúmeras dificuldades, dentre as quais lâminas d águas cada vez mais profundas. Neste contexto, as linhas submarinas são componentes de grande importância nesta atividade, pois estabelecem a comunicação entre as unidades de produção e os equipamentos submarinos. Este trabalho estuda a intera�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2011
-
11. Nonlinear dynamic analysis of a slender beam under bending and axial force with unilateral contact in elastic winkler support: an application to the study of vibrations of risers in catenary. / Análise dinâmica não-linear de viga esbelta semi-infinita sob flexão composta com contato unilateral em apoio elástico: uma aplicação ao estudo de vibrações de risers em catenária.
Este trabalho visa a avaliar os efeitos dinâmicos em vigas esbeltas semi-infinitas com contato unilateral em apoio elástico sob flexão composta, e sua possível aplicação a dutos flexíveis de extração de petróleo offshore em configuração de catenária (Steel Catenary Risers) provocados por esforços de movimento da plataforma. O estudo se desenvol
Publicado em: 2011
-
12. Estudo dos principais parâmetros da confiabilidade de falha a fadiga de um riser marítimo de produção / Study of main parameters of reliability of faillure due to fatigue of a offshore riser
O presente trabalho propõe um procedimento para calcular a probabilidade de falha por fadiga em um SCR (Steel Catenary Riser), identificando os principais parâmetros e avaliando a influência destes na probabilidade desse tipo de falha. São consideradas nesse procedimento as condições oceanográficas, tais como esforços de ondas, correntezas e moviment
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2010