Offshore Mechanics
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. 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
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2. 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
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3. Estudo comparativo entre modelos na análise local de tubos flexíveis. / Comparative study between modles in local analysis of flexible pipes.
Este trabalho apresenta um estudo comparativo entre resultados obtidos através de um modelo analítico-numérico, um modelo em elementos finitos e resultados experimentais na análise estrutural local de tubos flexíveis utilizados na explotação de petróleo. Em particular, o modelo em elementos finitos proposto considera efeitos de não-linearidade decor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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4. Numerical Simulation of Accidental Explosions in Offshore Production Plant
The production of oil and gas is an inherently hazardous task. Therefore it is crucial to provide reliable estimates of the risks involved. The major contributors to the risk level of an offshore installation, for example, arise from accidents involving explosion and fire. Computational Fluid Dynamics (CFD) can be a powerful tool to help with the calculation
Publicado em: 2009
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5. The Lagrange equations for systems with mass varying explicitly with position: some applications to offshore engineering
The usual Lagrange equations of motion cannot be directly applied to systems with mass varying explicitly with position. In this particular context, a naive application, without any special consideration on non-conservative generalized forces, leads to equations of motions which lack (or exceed) terms of the form 1/2(¶m/
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-12
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6. ESTUDO EXPERIMENTAL DA INTERAÇÃO FOLHELHO-FLUIDO ATRAVÉS DE ENSAIOS DE IMERSÃO / EXPERIMENTAL STUDY OF INTERACTION SHALE-FLUID THROUGH IMMERSION TESTS
Most of borehole instability problems occur when argillaceous rocks such as shales are drilled and the drilling fluid interacts with the rock. The rock-fluid interaction is materialized through the exchange of ions and water molecules between the drilling fluid and the rock, generating pore pressure variation inside the shale and changes in minerals structur
Publicado em: 2003
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7. NOVA METODOLOGIA DE ENSAIOS TRIAXIAIS DE FOLHELHO / NEW METHODOLOGY FOR TESTING SHALES UNDER TRIAXIAL STRESSES / NUEVAS METODOLOGÍAS DE ENSAYOS TRIAXIALES DE
Shales constitute more than 75% of the drilled rocks in the search for hydrocarbons and an estimated high 90% of wellbore instability problems are credited to their presence. According to Steiger &Leung (1991), more than 600 Million US dollars are spent annually by the oil industry just to corrent the problems due to instabilities. This work presents a new m
Publicado em: 1998