A Numerical Procedure Accounting for Fluid Drag Forces and Cable Extensibility for the Static Response of Mooring Cables

Muhammad, Naik; Ullah, Zahid; Choi, Dongho

doi:10.1007/s13296-018-0322-5

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Therefore, it is very important to apply a geometric nonlinear analysis procedure that can handle both taut and slack and thus may replicate the real conditions. For this purpose, a three-dimensional numerical procedure based on the catenary equations developed by the authors in previous work [21] is used. A schematic layout of the submerged floating tunnel (SFT) is shown in Figure 1.…”

Section: Cables Modelingmentioning

confidence: 99%

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Assessment of the Dynamic Behaviors of Submerged Floating Tunnel Under a High-Speed Train Loading

Muhammad

2019

OFOAJ

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Submerged floating tunnels (SFTs) are innovative structural solutions to waterway crossings and are more economical compared to the conventional structures such as cable-supported bridges, underground tunnels or immersed tunnels. The dynamic behaviors of SFT under real train loads is the primary design requirement of an SFT, However, it is not investigated using realistic train models. In this study, the China-star high-speed train is used to evaluate the dynamic displacements, internal forces and cable tensions of SFT. The tunnel is modeled by FEM, the cables are modeled by elastic catenary cables, and ocean waves and currents are modeled by Airy's wave theory. The SFT displacements, bending moments and cable tensions were significantly influenced by moving trains. The SFT experienced extreme vertical displacements and there was a large drop in the minimum cable tensions. The mooring cables were slacked both by magnitudes and speed of the moving trains, which should be avoided for the safety of SFT. This study recommends the additional buoyancies for the stability of SFT subjected to high speed trains.

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Section: Cables Modelingmentioning

confidence: 99%

“…The X, Y, and Z-axes are pointed along the axis of the tunnel, transverse and vertical to the tunnel axis, respectively. The length projections (l xs , l ys , l zs ) for an element are given as [21]:…”

Section: Cables Modelingmentioning

confidence: 99%

Assessment of the Dynamic Behaviors of Submerged Floating Tunnel Under a High-Speed Train Loading

Muhammad

2019

OFOAJ

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“…Other parameters are those described in [16,17]. The mooring cables were modeled by the procedure described in [16,18,19]. The boundary conditions and limitations are similar to those described by [16].…”

Section: Equations Of Motionmentioning

confidence: 99%

Dynamic Characteristics of submerged floating tunnel under irregular waves

Muhammad

Mandokhail

Habib

et al. 2019

Journal of Applied and Emerging Sciences

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submerged floating tunnel (SFT) is an innovative structural solution for waterway crossings and is based on the idea of Archimedes Buoyancy. The main structure is kept at a certain depth underwater and is placed in position by anchor/mooring cables. SFT becomes a more economical alternative for waterways compared to classical solutions such as cable-supported bridge, immersed tunnel or underground tunnel when the width and depth of the waterway are large enough. As SFT is completely submerged in water and is subjected to extreme environmental conditions such as waves, earthquakes, and hurricanes, therefore, the evaluation the dynamic characteristics of an SFT under irregular waves is a key demand from the design point of view. In this study, the responses of an SFT that is to be built in Qindao Lake of China are investigated under irregular waves. A 3D FEM model for SFT was established, the tunnel was modeled by 3D beam elements and cables were modeled by elastic catenary elements. The irregular waves were modeled by JONSWAP spectrum. The time history analysis was performed under irregular waves and currents. The time-domain simulations were transformed to the frequency domain by Fast Fourier Transform (FFT). The spectra were smoothed using Savitzky-Golay smoothing filters. The transfer functions of SFT horizontal and vertical displacements; and cable tensions were obtained for 30 realizations. Two major peaks have been observed in each transfer function (response spectrum). One of the peaks was associated with the peak wave frequency; the second peak was associated with the translational natural frequency of the SFT.

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Space Engineering Design Concept for Installing a Spatial Heavy Crane to Ascend and Descend Payloads

Lima¹

2022

Adv. Astronaut. Sci. Technol.

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A Numerical Procedure Accounting for Fluid Drag Forces and Cable Extensibility for the Static Response of Mooring Cables

Cited by 7 publications

References 18 publications

Assessment of the Dynamic Behaviors of Submerged Floating Tunnel Under a High-Speed Train Loading

Assessment of the Dynamic Behaviors of Submerged Floating Tunnel Under a High-Speed Train Loading

Dynamic Characteristics of submerged floating tunnel under irregular waves

Space Engineering Design Concept for Installing a Spatial Heavy Crane to Ascend and Descend Payloads

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