Simplified analysis for estimation of the behavior of a submerged floating tunnel in waves and experimental verification

Seo, Sung-Il; Mun, Hyung-Suk; Lee, Jinho; Kim, Jinha

doi:10.1016/j.marstruc.2015.09.002

Cited by 92 publications

(41 citation statements)

References 7 publications

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“…The use of w-shape or double mooring is useful in restraining the horizontal displacement of SFT. However, as the wave height in the present case study is one meter and the displacement limit may be reached easily for extreme environmental conditions, as those highlighted by [8].…”

Section: Resultsmentioning

confidence: 77%

The role of cable stiffness in the dynamic behaviours of submerged floating tunnel

et al. 2017

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Abstract. Submerged floating tunnel (SFT) is a new solution for the transportation infrastructure through sea straits, fjords, and inland waters and can be a good alternative to long span suspension bridges and immersed tunnels. The mooring cables/anchors are main structural components to provide restoring capacity to the SFT. The time domain dynamic problem of SFT moored by vertical and inclined mooring cables/anchors is formulated. The dynamic analysis of SFT subjected to hydrodynamic and seismic excitations is performed. As the cable stiffness determines the deformation ability of SFT, therefore it becomes crucial to evaluate the effect of mooring cable stiffness on the response of SFT. The displacements and internal forces of SFT clearly specify that the vertical/tension leg mooring cables provide very small stiffness as compared to inclined mooring cables. In order to keep the SFT displacements within an acceptable limit, the effect of cable stiffness should be properly evaluated for practical design of SFT.

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Section: Resultsmentioning

confidence: 77%

The role of cable stiffness in the dynamic behaviours of submerged floating tunnel

et al. 2017

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“…It is also one of the most challenging tasks during numerical simulations due to the involvement of the fluid-structure interaction phenomena [27]. Morison's equation can be used to evaluate the hydrodynamic forces on the SFT and gives reliable estimates as compared to experimental data [11,12]. The hydrodynamic forces from ocean waves and currents, acting per unit length of the SFT, are given by the modified Morison's equation as follows [26].…”

Section: Modeling Of Waves and Currentsmentioning

confidence: 99%

“…The drag force is much smaller than the inertia [12], so the drag force term is linearized by removing the structural velocity term for numerical simplification. Substituting Equations (2)-(5) into Equation (6), the horizontal and vertical components of hydrodynamic forces in the Y-direction and the Z-direction can be obtained as follows:…”

Section: Modeling Of Waves and Currentsmentioning

confidence: 99%

“…The work in [11] calculated the wave loads on a circular SFT using the boundary element method (BEM) and Morison's equation and compared the results with model tests. Wave loads on an elliptical SFT were calculated similarly by [12] using Morison's equation and compared with the test results. These studies indicated that both BEM and Morison's equation gave reliable estimates of wave loads on SFT. with the test results.…”

Section: Introductionmentioning

confidence: 99%

“…However, the global performance of the SFT under complex environmental conditions is not yet well understood. The determination of stable mooring cable configurations for the SFT is one of the challenges for its realization [12,13]. Especially, the excessive lateral displacement of the SFT due to waves and currents make it questionable for safe transportation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance Evaluation of Submerged Floating Tunnel Subjected to Hydrodynamic and Seismic Excitations

2017

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Submerged floating tunnels (SFTs) are innovative structural solutions to waterway crossings, such as sea-straits, fjords and lakes. As the width and depth of straits increase, the conventional structures such as cable-supported bridges, underground tunnels or immersed tunnels become uneconomical alternatives. For the realization of SFT, the structural response under extreme environmental conditions needs to be evaluated properly. This study evaluates the displacements and internal forces of SFT under hydrodynamic and three-dimensional seismic excitations to check the global performance of an SFT in order to conclude on the optimum design. The formulations incorporate modeling of ocean waves, currents and mooring cables. The SFT responses were evaluated using three different mooring cable arrangements to determine the stability of the mooring configuration, and the most promising configuration was then used for further investigations. A comparison of static, hydrodynamic and seismic response envelope curves of the SFT is provided to determine the dominant structural response. The study produces useful conclusions regarding the structural behavior of the SFT using a three-dimensional numerical model.

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Hydrodynamic Response of Submerged Floating Tunnel in Combined Wave–Current Flows

Chen

Drost

Peters

2020

Lecture Notes in Mechanical Engineering

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Simplified analysis for estimation of the behavior of a submerged floating tunnel in waves and experimental verification

Cited by 92 publications

References 7 publications

The role of cable stiffness in the dynamic behaviours of submerged floating tunnel

The role of cable stiffness in the dynamic behaviours of submerged floating tunnel

Performance Evaluation of Submerged Floating Tunnel Subjected to Hydrodynamic and Seismic Excitations

Hydrodynamic Response of Submerged Floating Tunnel in Combined Wave–Current Flows

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