Análise numérica de cravação de estacas torpedo modeladas por integral de pressões

In deep-water offshore oil exploration, the mooring foundations are usually submitted to high loads in a soil that is, usually, extremely soft. To circumvent this problem, torpedo anchor is frequently used to fix the mooring line on seabed. In this context, this paper presents a new numerical approach to represent the soil reaction of torpedo anchor, in a global analysis tool to model its installation procedure, via a numerical integral of soil pressures on its penetrated surface. Therefore, this method is associated to the weak coupling formulation in time domain, in which the torpedo is represented by a rigid body with six degrees of freedom and the mooring and launching lines are represented by finite elements. The method was developed on in-house program SITUA-Prosim and compared to the classic True model. In this numerical procedure, a typical impact velocity and physical data were used to represent a real launching procedure evaluated in Campos Basin-Brazil. The geometric factors (presence of wings and tip) and the variation of the soil drag coefficient were evaluated as parameters of influence in the embedment depth of the anchor.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

2017

Author dc:creator

• Bezerra, Carolina Maria Nunes

Advisor dc:contributor.advisor

• Corrêa, Fabrício Nogueira

• Estacas
• Modelo de true
• Malha de painéis
• Resistência dos materiais
• Cisalhamento

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/5987

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/5987