Simulation of Irregular Waves in a Numerical Wave Tank

Li, Zhifu; Yuyun, Shi; HuiLonga, Ren; Li, Hui; Ashraf, Muhammad Aqeel

doi:10.1515/pomr-2015-0027

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Obviously, such Green function is calculated only one time, and its value is completely analogous to every time-steps. Zhi-Fu et al (2015) also applied the Green function for modeling the propagation of irregular waves in a numerical wave tank. Ismail (2016) adopted the Green function to develop the BEM–FEM.…”

Section: Introductionmentioning

confidence: 99%

Hydroelastic responses of floating composite plates under moving loads using a hybrid moving element-boundary element method

Nguyen

Luong

Cao

et al. 2020

Advances in Structural Engineering

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Responses of floating plates with the impact of moving excitations have been previously studied by several scholars. Generally, such structures were often assumed to be isotropic. Nonetheless, the directional-dependent bending stiffness should be considered for designing practical floating structures, especially for very large floating structures. Accordingly, this article aims to analyze hydroelastic responses of floating composite plates subjected to moving loads for the first time. For this, a novel numerical approach as a combination of boundary element method and moving element method which is named the BEM–MEM is proposed. In the this approach, governing equations of motion, moving element, and fluid matrices are formulated in a relative coordinate system traveling with moving loads. Consequently, the suggested paradigm can effectively eliminate difficulties in addressing the bound of computational domain and tracking the location of contact points which often encounter in the traditional finite element method owing to utilizing a fixed coordinate system. Several numerical examples are exhibited to demonstrate the performance and ability of the boundary element method-moving element method . Gained results are compared with those by the Fourier transform method and the asymptotic expression to verify the accuracy of the proposed methodology. The outcomes indicate that the speed of moving loads considerably affects the plate deflection. In addition, as the speed is larger than the minimum celerity of the free surface of hydroelastic system ( Cmin), the influence of anisotropy on the deflection becomes significant.

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Section: Introductionmentioning

confidence: 99%

Hydroelastic responses of floating composite plates under moving loads using a hybrid moving element-boundary element method

Nguyen

Luong

Cao

et al. 2020

Advances in Structural Engineering

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A Time-Domain 3D BEM–MEM Method for Flexural Motion Analyses of Floating Kirchhoff Plates Induced by Moving Vehicles

Luong

Nguyen

Cao

et al. 2020

Int. J. Str. Stab. Dyn.

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In this paper, hydroelastic behavior of a pontoon-type very large floating structure (VLFS) subjected to a moving single axle vehicle is computed using a novel numerical approach, in which the boundary element method (BEM) is firstly extended to cooperate with the moving element method (MEM), named the BEM–MEM. By utilizing this paradigm, the plate and fluid are discretized into “moving structural element” and “moving boundary element”, respectively, which are conceptual elements and “travel” with the moving vehicle. Thus, the proposed method can absolutely eliminate the need of keeping track the location of the moving load with respect to the floating structure. Particularly, the surrounding fluid is defined based on the potential flow theory and the motion of a floating plate is governed by the vibration equation of a thin plate. The governing equations of motion, moving element and fluid matrices of boundary element are formulated in a relative coordinate system traveling with the moving vehicle. Several examples are numerically conducted to illustrate the performance and ability of the BEM–MEM. Its obtained results are compared with those of the traditional finite element method for validation. The outcomes reveal that the proposed method is effective for the large-time behavior owing to the fact that it does not require a domain with the length greater than the horizontal displacement of the vehicle. The paper also discusses the effect of the liquid and structural parameters on responses of the vehicle and floating structure.

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The Moving Element Method for the Dynamic Responses of Floating Double-Plate Structures on the Shallow Water

Luong,

2023

Int. J. Str. Stab. Dyn.

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In this paper, the dynamic behavior of floating double-plate structures under a moving load is investigated in great detail with different factors utilizing the moving element method (MEM). The structures in this study are very large floating structures (VLFSs). The Kirchhoff–Love theory is used to model two floating plates connected by a Winkler-type elastic core, whilst the water surrounding the structure is simulated by the shallow linear water wave theory. In order to improve the computational efficiency of moving load problems, the MEM is adopted. Since the MEM uses fewer discrete elements than those of the traditional finite element method (FEM), the computational cost is reduced. The proposed two-plate model helps to reduce the influence of the surrounding water on the upper plate. Several numerical results are presented to investigate the influence of the ratio of thickness between layers as well as core stiffness on the displacements with different water depths, and load speeds.

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Simulation of Irregular Waves in a Numerical Wave Tank

Cited by 3 publications

References 14 publications

Hydroelastic responses of floating composite plates under moving loads using a hybrid moving element-boundary element method

Hydroelastic responses of floating composite plates under moving loads using a hybrid moving element-boundary element method

A Time-Domain 3D BEM–MEM Method for Flexural Motion Analyses of Floating Kirchhoff Plates Induced by Moving Vehicles

The Moving Element Method for the Dynamic Responses of Floating Double-Plate Structures on the Shallow Water

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