School of Civil Engineering, State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University
Aiming at the safety problem of the submarine cable after being impacted by a dropped object, the process of dropped objects impacting the submarine optical composite cable was simulated based on the CEL method. The comparative damage analysis of the rigid seabed and non-rigid seabed was carried out and damage effects of the different sizes, impact speeds, masses and impact angles of the dropped object were analyzed. The results showed that the damage to submarine cables under rigid seabed was significantly higher than that of non-rigid seabed. The armor layer was the main load-bearing component of the submarine optical composite cable. The damage and deformation of the cable core could be inferred from the damage level and deformation of the armor layer by studying the strain of the armor layer and the cable core. With the mass of the dropped object or the speed of the dropped object increasing, the possibility of damage to the submarine optical composite cable increased. For cube objects, when the impac tangle was less than 60°, the impact angle increased, the possibility of damage to the submarine optical composite cable increased.