Experimental Investigation of the Performance of Porous-Slope Floating Breakwater

Beach abrasion and erosion are problems that many beaches in Indonesia experience. Waves are the most influential processes in this phenomenon. When the waves move towards the coast, they will transform, generating currents near the coast. Currents moving along the coast displace sediment on the beach, causing changes in the shoreline. So it is necessary to carry out coastal protection efforts so that abrasion does not occur, which results in the erosion of coastal areas so that the island’s area is reduced and the coastline retreats. To overcome this problem, one of the supporting facilities is a submerged breakwater. In this paper, researchers will numerically study the effect of particle size on smoothed particle hydrodynamics (SPH) when waves pass through a submerged breakwater structure. The simulation is carried out on a Numerical Wave Tank (NWT), the piston is at the end of the tank, and the structure of the submerged breakwater is set according to the experimental scenario. The distance between the particles varied from 0.03, 0.025, 0.02, 0.015, and 0.01. The results show that the smaller the distance between the particles used, the wave elevation results are closer to the experimental model.

Section: Introductionmentioning

confidence: 99%

Effect of Interparticle Distance on Smoothed Particle Hydrodynamics on Wave Transformation Through Submerged Breakwater

Sujantoko,

Rasman,

Mustain

et al. 2024

“…The solution to this problem can be done naturally, namely dampening the waves with mangrove plants [9-13] and bamboo [14] or adjusting the coastal border by implementing integrated coastal zone management (ICZM). Another way is to construct a coastal protection structure, such as a floating breakwater [15][16][17][18][19][20][21][22][23][24][25][26] or a fixed breakwater [27][28][29][30][31][32]. This type of fixed breakwater, horizontal and vertical, is a very effective structure in protecting the coast by dissipating wave energy before it reaches the beach.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a Wave Hydrodynamic Numerical Model on a Single Vertical Porous Breakwater

Sujantoko,

Pramestika,

Mustain

et al. 2024

One of the problems in the coastal area is a change in the coastline in the form of a coastline retreat which results in the loss or damage of infrastructure and settlement facilities caused by extreme sea wave activity. One way to anticipate this problem is to build a breakwater. This research is focused on the effect of porosity and freeboard on the transmission and reflection of waves in a single vertical porous breakwater. Numerical modeling was done using a 3D Numerical Wave Tank (NWT) based on Smoothed Particle Hydrodynamic (SPH). The numerical model results show that the average transmission and reflection coefficients are 0.58 and 0.42. In addition, it can be seen that the freeboard and porosity influence the value of the transmission and reflection coefficients. Generally, the smaller the freeboard, the greater the transmission coefficient and the smaller the reflection coefficient. Meanwhile, the greater the porosity, the greater the transmission coefficient, and vice versa, the smaller the reflection.

“…However, floating structures are vulnerable to waves, which cause movement that can disrupt the comfort of the working crew's operations. Waves will cause dynamic responses in floating structures [4][5][6][7][8][9][10][11][12][13][14][15], so these movements need to be predicted early in the design.…”

Section: Introductionmentioning

confidence: 99%

Tanker and SPM Motion Response Analysis due to Environmental Load

Hadiwidodo,

Gymnastiar,

Syahroni

et al. 2024

The use of tankers for oil and gas distribution requires auxiliary structures such as Single Point Mooring (SPM). In the process of loading cargo, tankers must maintain a level of stability so that the load transfer process runs smoothly. Stability needs to be checked using inputs in the form of structural responses in free-floating conditions to get structural responses when moored. Analysis of the motion response of tankers and SPM in free-floating conditions showed that ballast tanker loads had a greater motion response than full loads with the largest movement on roll at 3.59 deg/m. The moored motion response of the tanker has the greatest amplitude in the surge movement towards the AP with a value of -0.2251 m.