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STUDI KELAYAKAN DESAIN KAPAL HISAP TAMBANG Mujahid, Ahmad Syafiul; Priohutomo, Kusnindar
Wave: Jurnal Ilmiah Teknologi Maritim Vol 12, No 2 (2018)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Feasibility study menjadi salah satu langkah penting diawal perencanaan pembangunan kapal. Karena dengan melakukan feasibility study maka akan didapatkan perhiutngan awal gaya-gaya yang akan bekerja pada badan kapal. Pada paper ini feasibility study dilakukan pada kapal jenis Bore Hole Mining (BHM). Kapal BHM ini diharapkan mampu beroperasi pada kedalaman 60 m. Pada paper ini feasibility study yang dibahas adalah analisa stabilitas kapal BHM dan tegangan geser yang dialami kapal BHM kondisi Loadcase Departure, Loadcase Full Load, Loadcase Half Load dan Loadcase Arrival. Dari hasil dari feasibility study yang dilakukan, maka dapat diambil kesimpulan kapal BHM tidak memenuhi standart yang ditetapkan dalam hal stabilitas pada berbagai kondisi loadcase dimana Angle of Minimum GZ kurang dari yang disyaratkan IMO pada 25 deg. Sedangkan untuk shear stress pada berbagai kondisi loadcase masih memenuhi kreteria yang ditetapkan BKI yaitu kurang dari 100MPa.

Strength Analysis and Assessment of Ina-TEWS Wave Glider Priohutomo, Kusnindar; Nugroho, Wibowo Harso; Yulfani, Rosi Dwi
International Journal of Natural Science and Engineering Vol 4, No 3 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v4i3.29873

Indonesia as a country that often experiences tsunami disasters needs to have an early warning system against tsunami disasters. This system can use various existing technologies, one of which is the tsunami buoy system. The new tsunami buoy system does not use the natural mooring system but uses the wave glider system. This paper discusses the structural strength of the surface floater of wave glider using Eva Foam and Fiberglass material for skin and Alluminium material for frame and kell. The surface floater using 16 pieces for frame and 1 piece for keel. Enviromental loads is use in this paper like hydrodynamics load and weight load. The results from this paper is material from Eva Foam has a maximum principle stress is 12693 Pa and shear stress is 6114.6 Pa. For material from Fiberglass has maximum principle stress is 11.875 Pa and shear stress is 6076.3 Pa. Safety factor (SF) from maximum principle stress and shear stress for Eva Foams is up to 6x and SF for maximum principle and shear stress for Fiberglass is up to 26x. Conclusions for this paper is the desain for surface floater of wave glider it can be operated in the sea with draugh 0.18 m.

Fatigue Life Analysis of Mooring Cleats on The N219A Aircraft Floater Based on Numerical Simulation Yulfani, Rosi Dwi; Rosyid, Daniel M.; Nugroho, Wibowo Harso; Priohutomo, Kusnindar; Sugiarto, Moh. Muria Armansyah; Arianti, Erdina
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 5, Number 2, July 2024 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v5i2.42798

One of the procedures for rescuing a seaplane after an operational is to secure it, namely by mooring at an available port or mooring at a mooring buoy. This mooring buoy is considered a vehicle necessary for securing seaplanes in coastal conditions where it is not yet possible to build infrastructure in the form of an amphiport. To overcome this problem, seaplanes need to add a mooring cleat at the end of the bow of each float, which attaches the rope to the mooring buoy itself. So, it is necessary to study the strength of the mooring cleat itself when withstanding environmental loads. This study was carried out by modelling the mooring cleat using the finite element method to determine where the most significant stresses occur in the mooring cleat structure. Mooring cleats are modelled on deck thickness with varying thicknesses of 20mm and 40mm. The stress that occurred in the mooring cleat structure is then calculated using the Palmgren-Miner rule to determine the fatigue life of the mooring cleat for each variation. It was found that the largest von Misses stress experienced by the structure using 7075-T6 aluminium material was 147.87 MPa, which occurred in the mooring cleat, which was located on the 20mm deck thickness variation at the portside. Meanwhile, this variation's most extended fatigue life calculation occurred for the 40mm deck thickness variation on the portside with 514.43 years.

Strength Analysis and Assessment of Ina-TEWS Wave Glider Priohutomo, Kusnindar; Nugroho, Wibowo Harso; Yulfani, Rosi Dwi
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Indonesia as a country that often experiences tsunami disasters needs to have an early warning system against tsunami disasters. This system can use various existing technologies, one of which is the tsunami buoy system. The new tsunami buoy system does not use the natural mooring system but uses the wave glider system. This paper discusses the structural strength of the surface floater of wave glider using Eva Foam and Fiberglass material for skin and Alluminium material for frame and kell. The surface floater using 16 pieces for frame and 1 piece for keel. Enviromental loads is use in this paper like hydrodynamics load and weight load. The results from this paper is material from Eva Foam has a maximum principle stress is 12693 Pa and shear stress is 6114.6 Pa. For material from Fiberglass has maximum principle stress is 11.875 Pa and shear stress is 6076.3 Pa. Safety factor (SF) from maximum principle stress and shear stress for Eva Foams is up to 6x and SF for maximum principle and shear stress for Fiberglass is up to 26x. Conclusions for this paper is the desain for surface floater of wave glider it can be operated in the sea with draugh 0.18 m.

Fatigue Life Amphibious Floater based on RAO Slamming Pressure Priohutomo, Kusnindar; Nugroho , Wibowo Harso; Arianti, Erdina; Hidayat, Dony; Pinindriya, Sinung Tirtha; Yulfani, Rosi Dwi; Sugiarto, Muria Armansyah; Ismail, Muhammad Fajariansyah; Eritha, Fadila Norasarin; Choiriyah, Isma
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 1 (2026): In Progress
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i1

Floater is one of the most important part of amphibious version plane and conducting study of it becomes one of the featured research to support Indonesia’s transportation. This paper examined general study of amphibious floater slamming load when landing on the water in the various plane landing situation, starting from stern 5°, stern 10°, bow 5°, bow 10°, heel 0°, heel 5° and heel 10°. Carbon Fiber Reinforced Polymer (CFRP) material is used with 20 and 40 mm thickness. Floater consists of three main parts which are base, keel, and frame. Seaplane is designed to withstand 1000 cycle (500 landing and 500 take off cycle) in a year. This paper confirms that with the thickness of 20 and 40 mm, and heel position of 0°, floater can withstand up to 65,535 years. In contrary, using the 20 and 40 mm layer when landing with any combination position, the floater can’t last and only has 0.01 year of fatigue life.

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