Subsea pipeline is a medium of crude oil transportation which is operated in deep sea with variation of water depth such as shallow water, deep water and ultra deep water. Each of water level influence the mechanical properties of subsea pipeline. This paper describes the alteration of subsea pipeline properties such as stress and strain along with the alteration of water depth. To ensure the subsea pipeline integrity, the subsea pipeline is simulated with different water depth by using Finite element software ANSY Workbench. The results show that the equivalent stress and strain tend to decrease by increasing of water depth.
Department of Mechanical Engineering, Universitas Riau, Pekanbaru, 28293, Indonesia
Departement of Aeronautic, Automotive and Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Malaysia
Ocean and Aerospace Engineering Research Institute (OCARI), Indonesia
Eventhough if the working load did not exceed on the limits strength of material but that was repeated and continous in the long time that can make failure in the structure. This condition is referred as fatigue failure. This article focus on strucure of tanker. The repeated load could come from wave or current at the sea, load and unloading operation on the ship or could come from vibration that continous from engine room. Observation would be made especially for the vessel was operating in the multi environment at the peat water and sea water, since the area in the Riau river fed bay peat water. Fatigue testing was conducted by cantilever rotating bending whereas while speciment test ratated some peat water or sea water was flowed using pumps.
Department of Mechanical Engineering, Universitas Riau, Pekanbaru, 28293, Indonesia