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Hotma Harapan Saragih
Universitas Tarumanagara
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Development of Experimental Models on Floating Breakwaters Hotma Harapan Saragih; Roesdiman Soegiarso; Indra Noer Hamdhan
Asian Journal of Social and Humanities Vol. 2 No. 4 (2023): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i4.232

Abstract

Indonesia is the largest archipelagic country in the world with a potential area consisting of 17,480 islands with a sea stretch of 5.8 million km2 and has the fourth longest coastline in the world at 95,181 km, has a very high level of risk of abrasion hazards, especially considering that more than 60% of Indonesians live in coastal areas. The main purpose of a floating breakwater is to protect an area against unwanted wave heights. One of the most important boundary requirements in port design is allowable downtime. This is a period of time when the port cannot fulfill its function so as to prevent the occurrence of unwanted things from the movement of ships. Downtime occurs when a certain wave height is exceeded, causing unwanted ship movements. This implies that the wave transmitted by the floating breakwater to the port determines the downtime. Of the 7 (seven) types that exist, the box type is taken for research because the box type is more effective and efficient in dampening waves. Then the type of box that is used as a test model is carried out with 2 (two) conditions. The test model to be studied is a floating pontoon with a mooring line and a floating pontoon tethered to a pile.
Development of Experimental Models on Floating Breakwaters Hotma Harapan Saragih; Roesdiman Soegiarso; Indra Noer Hamdhan
Asian Journal of Social and Humanities Vol. 2 No. 4 (2023): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i4.232

Abstract

Indonesia is the largest archipelagic country in the world with a potential area consisting of 17,480 islands with a sea stretch of 5.8 million km2 and has the fourth longest coastline in the world at 95,181 km, has a very high level of risk of abrasion hazards, especially considering that more than 60% of Indonesians live in coastal areas. The main purpose of a floating breakwater is to protect an area against unwanted wave heights. One of the most important boundary requirements in port design is allowable downtime. This is a period of time when the port cannot fulfill its function so as to prevent the occurrence of unwanted things from the movement of ships. Downtime occurs when a certain wave height is exceeded, causing unwanted ship movements. This implies that the wave transmitted by the floating breakwater to the port determines the downtime. Of the 7 (seven) types that exist, the box type is taken for research because the box type is more effective and efficient in dampening waves. Then the type of box that is used as a test model is carried out with 2 (two) conditions. The test model to be studied is a floating pontoon with a mooring line and a floating pontoon tethered to a pile.
Evaluation Reaction Support Breaker Wave Floating on the System mooring Catenary with Variation Position Fairlead Hotma Harapan Saragih; Roesdiman Sogiarso; Indra Noer Hamdhan
Journal of Business, Social and Technology Vol. 7 No. 1 (2026): Journal of Business, Social and Technology
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jbt.v7i1.584

Abstract

Research This evaluate reaction support on the breaker wave floating measuring (55 × 30 × 10) m moored effective draft 5 m use chain catenary system studlink as many as 10 pieces (5 left + 5 right ). Analysis numeric done using SAP2000 for variation fairlead elevation z=-5, " " 0, " " 5 m and angle uniform string θ=7.5^∘, " " 7.63^∘, " " 8^∘, " " 10^∘, " " 12^∘, " " 13^∘, " " 15^∘. Condition loading covering wave (H = 2.5 m; T = 5.5 s), load dead , load life , components hydrodynamics peak , load wind , buoyancy, and pretension per rope 666,667 kN. The results show that horizontal component X dominates reaction support with range around 240 – 276 MN, whereas The lateral component of Y ranges from 37 – 112 MN. The component vertical Z shows variation big and change sign depends fairlead elevation : Z value can be reach mark positive extreme until hundreds thousand MN in low fairlead cases and values negative large on high fairlead . Findings This confirm influence significant catenary configuration ( fairlead elevation and angle rope ) against distribution style to anchorage and highlight the need verification output numeric ( especially component vertical ) and extraction reactions per component burden before design end of anchorage. Recommendation covering analysis pretension sensitivity , simulation mooring time domain dynamics , and studies capacity land base for critical anchors .
Co-Authors Hamdhan, Indra Noer Indra Noer Hamdhan Roesdiman Soegiarso Roesdiman Sogiarso