Breaking Wave Impact on a Slender Cylinder

Wienke, Jan; Sparboom, Uwe; Oumeraci, Hocine

doi:10.1061/40549(276)139

Cited by 17 publications

(18 citation statements)

References 5 publications

(4 reference statements)

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“…The elevation of these points represents the highest surface elevation of the breaking waves. According to Wienke et al (2000) visual analysis of the tests is important for the identification of the loading cases, for the comparison of measurements and theoretical predictions. It is expected that Wienke´s theoretical approach will fit best for loading case 3 associated with the highest impact attack.…”

Section: Breaking Wave Characteristicsmentioning

confidence: 99%

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Breaking Wave Characteristics for the Loading of a Slender Pile

Irschik¹,

Sparboom²,

Oumeraci³

2003

Coastal Engineering 2002

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Large-scale model tests were carried out in the Large Wave Channel (GWK) with a slender cylindrical pile located at the end of a 1:10 slope. The test cylinder was subject to both regular and irregular waves. The paper deals with (i) the evaluation of the breaker characteristics at the breaking point for the test conditions, (ii) the comparison of the results with published data from small-scale experiments and (iii) the measured vertical distribution of horizontal particle velocities under a breaking wave. Additionally a new method of separating the measured force history into a slowly varying quasi-static and a dynamic part is presented by using the EMD (Empirical Mode Decomposition) for the analysis of breaking wave attack.

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Section: Breaking Wave Characteristicsmentioning

confidence: 99%

“…The impact force depends not only on the breaker type, but also on the distance of the breaking point from the front of the cylinder (Tanimoto et al 1986). Chan et al (1995) and Wienke et al (2000) have recognized five different loading cases by visual classification. Based on Eq.…”

Section: Introductionmentioning

confidence: 99%

Breaking Wave Characteristics for the Loading of a Slender Pile

Irschik¹,

Sparboom²,

Oumeraci³

2003

Coastal Engineering 2002

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“…This maximum line force corresponds to a slamming coefficient of 2π which is twice the value assumed for the model of Goda (Wienke et al 2000).…”

Section: Maximum Line Forcementioning

confidence: 94%

Theoretical Formulae for Wave Slamming Loads on Slender Circular Cylinders and Application for Support Structures of Wind Turbines

Wienke¹,

Sparboom²,

Oumeraci³

2005

Coastal Engineering 2004

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Based on large scale experiments theoretical formulae for the load due to breaking wave impact on slender piles have been developed. The load distribution in time and space is given by the proposed theoretical 3D-impact model. The formulae are applied to calculate the impact force on a support tower of a wind turbine subjected to breaking wave. The bending moment at the base of the support tower can also be determined.

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“…The experimental results showed that the incident wave steepness and the distance between the cylinders were two important factors, especially when the cylinders are arranged in orientations normal to the wave propagation than parallel to the wave propagation. Wienke et al [2] conducted large-scale experimental studies on breaking wave impacts on a vertical cylindrical pile. It was presented that the total breaking wave force is the sum of the quasi-static force calculated by the Morison equations and the slamming force considering the duration of the impact.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Breaking Wave Loading on Standing Circular Cylinders with Different Transverse Inclined Angles

Liu

Ong

et al. 2020

Applied Sciences

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The purpose of this paper is to numerically simulate the breaking wave past a standing cylinder with different transverse inclined angles. The numerical simulations are carried out by solving the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations with the k − ω SST turbulence model. The air-water interface is captured using the Volume of Fluid (VOF) method. The convergence studies on the grid and time-step are performed by examining the total horizontal breaking wave forces on the vertical cylinder. The present numerical results have been validated with the published experimental data. A good agreement is obtained between the present numerical results and the experimental data in terms of the surface elevation and the horizontal breaking wave force. Moreover, the total horizontal breaking wave force is decomposed into low-order and high-order wave forces through Fast Fourier Transform (FFT). It is observed that the free surface elevations in front of the cylinder and the normalized high-order wave force have a minimum value when the transverse inclined angle of the cylinder is 45 • . The secondary load causing the higher-harmonic ringing motion of structures is not observed when the cylinder is placed with the transverse inclined angles of 30 • and 45 • .

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Breaking Wave Impact on a Slender Cylinder

Cited by 17 publications

References 5 publications

Breaking Wave Characteristics for the Loading of a Slender Pile

Breaking Wave Characteristics for the Loading of a Slender Pile

Theoretical Formulae for Wave Slamming Loads on Slender Circular Cylinders and Application for Support Structures of Wind Turbines

Numerical Simulation of Breaking Wave Loading on Standing Circular Cylinders with Different Transverse Inclined Angles

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