Numerical investigation of solitary wave attenuation by a vertical plate-type flexible breakwater using an FVM–FEM coupled model. Part 1: Linear elastic isotropic material

Sun, Wenbin; Nakamura, Tomoaki; Cho, Yong‐Hwan; Mizutani, Norimi

doi:10.1016/j.oceaneng.2023.115368

Cited by 2 publications

(4 citation statements)

References 58 publications

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“…This study furthers our previous works [22] to consider the large strain of structure. The nonlinear elastic behaviors of the vertical plate-type flexible breakwater are described by employing two nonlinear elastic models, the linear elastic isotropic material model with NLGEOM and the hyperelastic neo-Hookean material model.…”

Section: Introductionsupporting

confidence: 86%

“…The breakwater's upper boundary was free, whereas its lower boundary was securely anchored. Across the numerical wave tank's x-axis, 7 wave gauges (WG1 to WG7) were placed to capture the water surface elevation at positions x = −3, −2, −1, 0, 1, 2, and 3 m. This research replicated 65 cases that were previously documented by Sun et al [22], detailed in Table 1. In continuation of our previous work, this coupling model has been validated that it can predict this fluid-structure interaction phenomenon accurately.…”

Section: Resultsmentioning

confidence: 75%

“…In continuation of our previous work, this coupling model has been validated that it can predict this fluid-structure interaction phenomenon accurately. For information about the section discussing model validation, please refer to previous research [22].…”

Section: Coupling Algorithmmentioning

confidence: 99%

“…This integration built the connection of pimpleFoam and interFoam with the FEM structural code CalculiX [21], enhancing the capability to simulate complex interactions between different physical processes. Based on preCICE, we set up the connections between wave2foam and Calculix to realize the wave interaction with elastic structures in our previous work [22]. A linear elastic isotropic material model with LGEOM was employed to describe the dynamic response of the vertical plate-type flexible breakwater.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Solitary Wave Attenuation by a Vertical Plate-Type Flexible Breakwater Constructed Using Hyperelastic Neo-Hookean Material

Sun,

Nakamura,

Cho

et al. 2024

JMSE

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This study conducted numerical investigations on solitary wave attenuation by a vertical plate-type flexible breakwater constructed using hyperelastic neo-Hookean material. The wave attenuation performance and elastic behaviors of the flexible breakwater were discussed systematically by considering the effects of three prominent factors: mass coefficient, stiffness coefficient, and Poisson’s ratio. It is indicated that more compressible and flexible materials are beneficial for enhancing efficiency in mitigating solitary wave energy and protecting the structure from damage. In addition, the performance of the hyperelastic neo-Hookean material model was compared with that of a linear elastic isotropic material model coupled with linear and nonlinear geometry analysis (LGEOM and NLGEOM) by evaluating several key targets: wave reflection coefficient, transmission coefficient, horizontal tip displacement, and wave load. Our findings revealed that the hyperelastic neo-Hookean material model showed almost the same predictions as the linear elastic isotropic material model with NLGEOM, but significantly diverged from that with LGEOM. The linear elastic isotropic material model with LGEOM cannot capture the nonlinear variations in structural geometry and stress–strain relationship, resulting in the underestimation and overestimation of horizontal tip displacement under moderate and extreme wave loads, respectively. Moreover, it underestimates the damage inflicted by solitary waves due to inaccurately predicted wave reflection and transmission.

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Section: Introductionsupporting

confidence: 86%

Section: Resultsmentioning

confidence: 75%

Section: Coupling Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Investigation of Solitary Wave Attenuation by a Vertical Plate-Type Flexible Breakwater Constructed Using Hyperelastic Neo-Hookean Material

Sun,

Nakamura,

Cho

et al. 2024

JMSE

Self Cite

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Experimental and Numerical Analysis of the Influence of Fluid–Structure Interactions on the Dynamic Characteristics of a Flexible Tank

Bui

2024

J. Vib. Eng. Technol.

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This study evaluated the effect of two-way fluid-structure interactions (FSIs) on the dynamic characteristics of flexible storage liquid tanks. A hybrid approach, combining the finite volume method (FVM) and the finite element method (FEM), denoted as FVM/FEM, was used to model the response of a flexible water tank under seismic loading. The fluid domain was simulated using FVM, while the structural domain was represented using FEM. A two-dimensional interaction equation was solved at the contact surface between an elastic tank wall and the fluid by tuning the relaxation parameter and convergence conditions. The proposed FVM/FEM model provides fundamental insights for modeling interactions two-way FSI. The model enables evaluating the effect of considering two-way FSI on the dynamic characteristics of a tank flexible to a rigid tank wall. The accuracy of the coupling FVM/FEM method was confirmed through a comparative experiment with previous studies and design code, including the quantities of natural frequency, liquid sloshing, and hydrodynamic pressure. The results showed that the frequency of flexible tank walls differed from that of rigid walls, especially the hydrodynamic pressure of liquid motion acting on the tank. The peak hydrodynamic pressure of the fluid acting on thick-walled when considering FSI is 38.2 kPa, deviating only 0.2% from the ACI standards (38.12 kPa) or 5.47% with EC8 (36.11 kPa). However, the study shows that when considering the two-way interaction for thin-walled tanks, this deviation from ACI and EC8 increases significantly to 12.2% and 16.8%, respectively. From that, the numerical results show a "threshold value" is revealed to distinguish flexible or rigid tanks. If the tank stiffness exceeds this threshold, then the thicker the tank, the lower the hydrodynamic pressure. However, if the tank stiffness is lesser, vice versa. A good agreement is observed between the numerical, analytical, published, and experimental data.

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Numerical investigation of solitary wave attenuation by a vertical plate-type flexible breakwater using an FVM–FEM coupled model. Part 1: Linear elastic isotropic material

Cited by 2 publications

References 58 publications

Numerical Investigation of Solitary Wave Attenuation by a Vertical Plate-Type Flexible Breakwater Constructed Using Hyperelastic Neo-Hookean Material

Numerical Investigation of Solitary Wave Attenuation by a Vertical Plate-Type Flexible Breakwater Constructed Using Hyperelastic Neo-Hookean Material

Experimental and Numerical Analysis of the Influence of Fluid–Structure Interactions on the Dynamic Characteristics of a Flexible Tank

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