Efficient time-domain approach for hydroelastic-structural analysis including hydrodynamic pressure distribution on a moored SFT |
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| Affiliation: | 1. Department of Ocean Engineering, Texas A&M University, College Station, TX, 77843, USA;2. Department of Ocean Engineering and Marine Sciences, Florida Institute of Technology, Melbourne, FL, 32901, USA;3. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China;2. School of Mechanical Engineering, Tianjin University, 135 Yaguan Road, Tianjin, 300072, China;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;1. School of AI Convergence, Sungshin Women''s University, 2, Bomun-Ro 34da-gil, Seongbuk-Gu, Seoul, 02844, Republic of Korea;2. Department of Naval Architecture and Ocean Engineering, Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea;3. Ship & Offshore Research Institute, Samsung Heavy Industries Co., Ltd., 217, Munji-ro, Yuseong-gu, Daejeon, 34051, Republic of Korea;4. DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering Co., Ltd, 96, Baegot 2-ro, Siheung-si, Gyeonggi-do, 15011, Republic of Korea;5. Ship Navigation Research Department, Hyundai Maritime Research Institute, Hyundai Heavy Industry Co., Ltd., 75, Yulgok-ro, Jongno-gu, Seoul, 03058, Republic of Korea;6. Ship & Offshore Technology Center, Korean Register, 36, Myeongji Ocean City 9-ro, Gangseo-gu, Busan, 46762, Republic of Korea |
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| Abstract: | This study investigates the hydroelastic analysis of a moored SFT (submerged floating tunnel) and the corresponding hydrodynamic pressure distribution under wave excitations. Time-domain discrete-module-beam (DMB) method, in which an elastic structure is modeled by multiple sub-bodies with beam elements, is employed to express the deformable tunnel with multiple mooring lines. Moreover, the top-down scheme is also adopted for detailed structure analyses with less computational cost, which applies the calculated hydrodynamic pressure distribution over SFT's surface to the three-dimensional finite element model. The hydrodynamic pressure includes both wave-induced diffraction pressure and motion-induced radiation pressure. For the validation of the developed numerical approach, comparisons are made with computationally intensive hydroelastic-structural direct-coupled method, two-dimensional wave flume experiment, and independently developed inhouse moored-SFT-simulation program. Furthermore, the influences of flexural motions with buoyancy-weight ratio (BWR) (or bending stiffness) and regular/irregular wave conditions on the dynamic pressure distribution and the resulting local stresses are investigated. |
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| Keywords: | Hydroelasticity Discrete module beam method Submerged floating tunnel Pressure distribution Diffraction/radiation pressure Static equivalent structural analysis |
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