Validation of a 2-D semi-coupled numerical model for fluid–structure–seabed interaction

Ye, Jianhong; Jeng, Dong‐Sheng; Ren, Wenyuan; Zhu, Changqi

doi:10.1016/j.jfluidstructs.2013.04.008

Cited by 70 publications

(24 citation statements)

References 39 publications

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“…For the detailed parameters, please refer to Table 3. As illustrated in Ye et al [2013], for the soil model, the horizontal element size can be L w /40 and the vertical element size can be one-third to one-twice the size of horizontal. The time step is set as ∆t = T /N t , where T is wave period and, in general, N t =40-50.…”

Section: Resultsmentioning

confidence: 99%

Numerical Study for Soil Response Around Submerged Breakwaters with Bragg Reflection

Cui

Jeng

2018

International Journal of Ocean and Coastal Engineering

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A better understanding of soil behavior in a seabed foundation around submerged breakwaters under combined wave and current loadings has become crucial regarding the design and maintenance for such breakwaters. Bragg effect is considered in this study, which is one of the important factors that influence the flow field and soil response in the vicinity of multiple breakwaters. The wave-current induced dynamic soil response (effective stresses, pore pressures and displacements) and its resultant residual liquefaction in a loosely deposited seabed foundation around multiple breakwaters are investigated. In this study, the wave motion is governed by VARANS equation and the Biot’s [Formula: see text]–[Formula: see text] approximation is used to govern soil-fluid interactions in porous medium. The elasto-plastic constitutive model (PZIII) is used to reproduce the plastic soil behavior in seabed foundation under long-term cyclic ocean loading. Numerical results show that the flow motion can be largely changed due to Bragg effects. The construction of breakwaters significantly change the stress field in seabed foundation. Parametric study shows that, under the strongest Bragg effect, the presence of currents, soil properties and wave characteristics have great impact on the liquefaction potential.

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Section: Resultsmentioning

confidence: 99%

Numerical Study for Soil Response Around Submerged Breakwaters with Bragg Reflection

Cui

Jeng

2018

International Journal of Ocean and Coastal Engineering

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“…In the present model, the single-step time integration method of the Newmark method [49] is adopted, which could handle each time step independently when the first-and second-order time derivatives exist at the same time. More details can be found in some previous studies [50,51].…”

Section: Meshfree Model For the Seabed Domainmentioning

confidence: 99%

Response of a Porous Seabed around an Immersed Tunnel under Wave Loading: Meshfree Model

Han

Jeng

Tsai

2019

JMSE

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Seabed instability surrounding an immersed tunnel is a vital engineering issue regarding the design and maintenance for submarine tunnel projects. In this study, a numerical model based on the local radial basis function collocation method (LRBFCM) is developed to evaluate the seabed behaviour in a marine environment, in which the seabed is treated as the porous medium and governed by Biot's "u − p" approximation. As for the flow field above the seabed, the VARANS equations are used to simulate the fluid motion and properties. The present model is validated with analytical solutions and experimental data which show a good capacity of the integrated model. Both wave and current loading are considered in this study. Parametric studies are carried out to investigate the effects of wave characteristics and soil properties. Based on the numerical results, the maximum liquefaction depth around the immersed tunnel could be deeper under the wave loading with long wave period (T) and large wave height (H). Moreover, a seabed with lower permeability (K s ) and degree of saturation (S r ) is more likely to be liquefied.

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“…The definition of coefficient matrices M, K, Q, G, S, H, f ð1Þ , f ð2Þ , and the detailed information for the numerical method to solve the Biot's equation can be found in [1,[27][28][29]. In this seismic dynamics simulation, the stiffnessproportional Rayleigh damping model is applied for the purpose of stabilizing the numerical results.…”

Section: Governing Equationsmentioning

confidence: 99%

Seismic dynamics of offshore breakwater on liquefiable seabed foundation

Wang

2015

Soil Dynamics and Earthquake Engineering

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Validation of a 2-D semi-coupled numerical model for fluid–structure–seabed interaction

Cited by 70 publications

References 39 publications

Numerical Study for Soil Response Around Submerged Breakwaters with Bragg Reflection

Numerical Study for Soil Response Around Submerged Breakwaters with Bragg Reflection

Response of a Porous Seabed around an Immersed Tunnel under Wave Loading: Meshfree Model

Seismic dynamics of offshore breakwater on liquefiable seabed foundation

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