... waves coming from portside and starboard, with 60 catenary shaped flexible risers connected. The roll RAOs calculated with the described procedure have presented a good agreement with the roll motions calculated with a coupled time-domain model in OrcaFlex™. From the hull “point of view”, the effect...

... evaluation. The present work is an extension of the previous one [1] and its main goal is to develop a network that from just one single training it is able to generate accurate predictions of the axial tensions and bending moments time series of flexible risers connected to different platforms and also...

... increases. On the other hand, the yield strain rose as the bending strain increased. bending strain PVDF cavitation flexible risers ENVIRONMENTAL STRESS CRACKING ON PVDF: ISO 22088-3 (PRELIMINARY DATA) Rafael Luis Freitas1, Celio Costa. Programa de Engenharia Metalúrgica e de Materiais...

... are also necessary to help to decide if any action is needed. In both situations, end fittings and bendstiffeners are usually the critical regions. Considering the high number of flexible risers installed in Brazil and the structural complexity of this kind of structure, a robust and fast methodology...

... Abstract A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength...

... Abstract Flexible risers are the main way to connect wells and floaters for petroleum and gas applications on the Brazilian coast. The failure of those risers in operation can generate huge irreversible economic and environmental expenses. Statistics indicate that there is a predominance...

... structural analysis analytical model flexible risers This work presents an analytical model for the structural analysis of flexible risers subjected to combined loads of bending, twisting and tension, as well as internal and external pressures applied to the riser. Flexible risers...

... 09 01 2009 Flexible risers are complex structures used in offshore oil exploitation activities. Such structures are composed of several concentric polymeric and steel armour layers which withstand static and dynamic loads applied by the floating production vessel and by the ocean...

..., for a continuous flexible riser integrity assessment. This paper describes and evaluates these techniques, as well as reports the results obtained from field experience. flexible risers integrity assessment submarine repair desc resu subm INT insta repl to th mai thes well tech Proceedings of OMAE2006...