Journal
MARINE STRUCTURES
Volume 44, Issue -, Pages 142-158Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marstruc.2015.09.002
Keywords
Inertia force; Morison's equation; Physical model; Linear wave theory; Wave load; Drag force; Submerged floating tunnel
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Funding
- R&D Program of the Korea Railroad Research Institute, Republic of Korea
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To achieve rational design in waves for a submerged floating tunnel which has emerged as a new offshore transportation infrastructure, it's necessary to understand its hydrodynamic behavior. For simple but accurate estimation of hydrodynamic forces, a theoretical method is proposed and the tests with physical models in a wave flume were carried out for verification. Morison's equation was used to estimate wave loads composed of inertia force and drag force. Forces calculated by applying the linear wave theory to Morison's equation coincided well with those measured by the tests. The test results showed that mooring systems played a significant role in the movement of the submerged floating tunnel in waves. A pendulum model could be used to describe the motion of the submerged floating tunnel with a single vertical mooring. Based on the verified relations, a simple slack condition which causes the submerged floating tunnel to be unstable was also proposed. The simplified approach proposed by this study proved to be useful in designing the submerged floating tunnel in the initial stage. (C) 2015 Elsevier Ltd. All rights reserved.
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