Nowadays, in order to be competitive on the market, it is fundamental to design optimized devices. This is especially true in the Offshore sector where the product’s weight has a material influence on all operations. Reducing this parameter implies a significant decrease in the project’s cost. This paper proposes the study of the kinematic rotation of a prototype machine required to lay down an umbilical system, needed to provide the vital supply (electricity and fiber optic) from platforms or topside vessel to subsea oil and gas furniture. In this paper, it will be proposed a solution for the delivery of a 600 mm external diameter umbilical product. In the studied case, the Client asked to have a cable that partially floats once it reaches the sea water showing incredible benefits such as the possibility to be replaced and small umbilical deflections due to a catenary effect reduction. Due to this singular request, the proposed prototype machine – characterized by the rotation of an articulated parallelogram, activated by two main pistons – ensures safety operation and integrity of the laid umbilical. Starting from an accurate structural analysis, a reliable model has been created and a first solution of the forces distribution along the chute elements has been found, highlighting some significant points (static configurations during a dynamic evolution). During the piston design phase, some limitations of current DNV standards (when dealing with offshore technologies) have been highlighted. To investigate this peculiar phenomenon several results obtained by different numerical approaches are proposed. The present machine could be even applied in the renewable energy field, for connecting wind turbines in the wind farm’s hub and then to carry the produced energy on shore. This analysis results in a 15% machine weight reduction with respect to the initial design. Such simulation provided a practical design tool for the Offshore market.
Optimization procedure of an overboarding chute with standards, mechanical and numerical considerations
N. Fantuzzi
;
2019
Abstract
Nowadays, in order to be competitive on the market, it is fundamental to design optimized devices. This is especially true in the Offshore sector where the product’s weight has a material influence on all operations. Reducing this parameter implies a significant decrease in the project’s cost. This paper proposes the study of the kinematic rotation of a prototype machine required to lay down an umbilical system, needed to provide the vital supply (electricity and fiber optic) from platforms or topside vessel to subsea oil and gas furniture. In this paper, it will be proposed a solution for the delivery of a 600 mm external diameter umbilical product. In the studied case, the Client asked to have a cable that partially floats once it reaches the sea water showing incredible benefits such as the possibility to be replaced and small umbilical deflections due to a catenary effect reduction. Due to this singular request, the proposed prototype machine – characterized by the rotation of an articulated parallelogram, activated by two main pistons – ensures safety operation and integrity of the laid umbilical. Starting from an accurate structural analysis, a reliable model has been created and a first solution of the forces distribution along the chute elements has been found, highlighting some significant points (static configurations during a dynamic evolution). During the piston design phase, some limitations of current DNV standards (when dealing with offshore technologies) have been highlighted. To investigate this peculiar phenomenon several results obtained by different numerical approaches are proposed. The present machine could be even applied in the renewable energy field, for connecting wind turbines in the wind farm’s hub and then to carry the produced energy on shore. This analysis results in a 15% machine weight reduction with respect to the initial design. Such simulation provided a practical design tool for the Offshore market.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
