Three‐dimensional wave impact on a rigid structure using smoothed particle hydrodynamics

Abstract

SUMMARY Navier–Stokes computations of a wave–structure interaction are performed with the aim of assessing the potential of smoothed particle hydrodynamics to accurately estimate impact loading time history. A three‐dimensional dam‐break flow with a rectangular column located downstream is considered. The net force and impulse exerted on the column is monitored throughout the simulation with the results correlating well with existing experimental data. Initial and boundary conditions and numerical parameters are varied and their effect on the column load investigated. The column load is found to be most sensitive to the choice of boundary treatment. Copyright © 2011 John Wiley & Sons, Ltd.

Three-dimensional water impact at normal incidence to a blunt structure

“…Figure 5 in [8] shows a nearly vertical front face of the dam-break wave at the instant of impact, the height of which is estimated to be H = 0.16 m which leads to the aspect ratio h ≈ 2.6 in our theory. It is difficult to extract the velocity of the wavefront from both the numerical results and the experimental measurements presented in reference [8]. The velocity of the wavefront is assumed equal to the critical velocity V = gH ≈ 1.3 m s −1 , where g is the gravitational acceleration.…”

“…The simulated case concerned a dambreak flow impact onto a rectangular column with square cross section 0.12 × 0.12 m. The distance between the column and the dam was 0.5 m. The water front arrived at the column about 0.25 s after the flow starts. Cummins et al [8] where |F(τ )| is the magnitude of the hydrodynamic load exerted on the column. Figure 5 in [8] shows a nearly vertical front face of the dam-break wave at the instant of impact, the height of which is estimated to be H = 0.16 m which leads to the aspect ratio h ≈ 2.6 in our theory.…”

“…Cummins et al [8] where |F(τ )| is the magnitude of the hydrodynamic load exerted on the column. Figure 5 in [8] shows a nearly vertical front face of the dam-break wave at the instant of impact, the height of which is estimated to be H = 0.16 m which leads to the aspect ratio h ≈ 2.6 in our theory. It is difficult to extract the velocity of the wavefront from both the numerical results and the experimental measurements presented in reference [8].…”

“…Ramsden [4] concluded that the dry-bed surges do not lead to impact forces in experiments. However, such forces of large magnitude and short duration were computed by Cummins et al [8]. To the authors' best knowledge, there have been no three-dimensional studies, even using numerical methods, for complicated convex geometries, such as circular cylinders.…”

Dynamic characteristics of an offshore wind turbine with breaking wave and wind load

“…Mokrani et al [5] used a NS-VOF approach to study the slamming forces on a vertical wall. The wave impact on a rectangular column using smoothed particle hydrodynamics (SPH) was studied by Cummins et al [6]. However, although various researchers have studied the breaking wave impact forces on the structure, little information is currently available in the literature on the dynamic behavior of an OWT structure under the action of the breaking waves.…”