Abstract
The damaged subsea cable causes social and economic losses as well as high repair cost. Various types of facilities protecting the subsea cable from hazard apparatus such as anchor have been developed. Previous studies related to subsea cable protection facilities have not fully considered the actual underwater conditions. In this study, numerical analyses were carried out to simulate the underwater drop of stock anchor which is one of the biggest risk factors for subsea cable failure. The numerical simulations of the underwater drop of the stock anchor applied fluid-structure interaction analysis based on the three-dimensional coupled Euler-Lagrange method to take into account the actual underwater conditions. Since the numerical computation cost of the 3-D FSI method is very high, we evaluated the parameter influence on the Euler domain in order to realize reasonable modeling related to the simulation. The numerical simulation results were validated by comparing with the results of the theoretical solutions. The numerical simulation cost according to the parameter change was also reviewed, and reasonable Euler domain modeling parameters were determined.
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