The Effect of Hoses Shape on End-Loads in Chinese Lantern Type of Subsea Hoses Based on Hydrodynamics Simulation
摘要
Subsea hosesSubsea hose type of Chinese LanternChinese Lantern tends to be riskier than the other type of marine hoses. The loadsLoads from the environment and motion of the floating facilities not only affect the strength of the hoses but also affect the end loadsEnd loads on the hose fixation point, which may generate high stressStress on structures at the seabed and sea surfaces. Therefore, this research was conducted to study the effect of hose shapeHose shape on hose end-loadsLoads at the hose fixation point, i.e., connection at the buoy and pipeline end manifold (PLEM). Firstly, this research modeled two 20-inch hoses in the catenary anchor leg mooring (CALM) configuration, where the ship is assumed to be moored at the buoy. Then, the hose was varied with three shapes depending on its bend curvature. Finally, the hydrodynamicHydrodynamic simulation was determined to be 10,800 s using numerical solutions based on Morison-force equations. The end loadsEnd loads to be analyzed were tension, shear force, bending momentBending moment, and torque. The results of this study showed that the more bend of the hose shapeHose shape mostly increases the end loadsEnd loads, except for tension at the end of the buoy where the value decreases.