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Applied Science Technology in Naval Engineering (ASTNE)
Published by Universitas Pembangunan Nasional Veteran Jakarta
ISSN : 30318866     EISSN : 30318866     DOI : https://doi.org/10.54378/astne.v3i2
Core Subject : Science, Education, Engineering,
Energy Engineering Mechanical Engineering Other
Applied Science and Technology on Naval Engineering (ASTNE) is open-access journal related to Naval engineering. It is open to all students, engineers, architectures, scientists, researchers, practitioners and other scholars to publish scientific paper in ASTNE. ASTNE cover the following topics: Hydrodynamics and Stability Marine Engineering Design and Ship Optimization Maritime Technology Ocean Renewable Energy Coastal and Offshore Marine Transportation ISSN: 3031-8866 SINTA Accreditation: In Progress PUBLICATION FREQUENCY Applied Science and Technology on Naval Engineering (ASTNE) will publish two times of issues per year in February and August.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)" : 5 Documents clear
Analisis Manufactured Sand Untuk Proses Sandblasting Pada Kapal Harun, Lukman Ibnu
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)
Publisher : Fakultas Teknik UPN Veteran Jakarta

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Abstract

Sandblasting is a process carried out to clean the surface of steel materials from rust, old paint, and adhering dirt. Limitations on the use of silica sand for sandblasting have led to the use of manufactured sand as an alternative. The objective of this research is to determine the standards of abrasive 1.0 and 2.0 and to assess the effectiveness of manufactured sand in the sandblasting process concerning the surface roughness level, dust level, and its impact on abrasive prices. Testing was conducted on grade A steel plates with A-grade rust levels, following ISO standards. Manufactured sand was varied by adjusting the composition percentages used in the silica sand mixture, with a maximum composition of 100% in one abrasive and combined in proportions of 100%, 70%, and 30%. From the test results, it was found that the highest surface roughness level was in the manufactured sand 30% variation with a value of 0.091. The lowest dust level for abrasive standards 1.0 and 2.0 was achieved by the manufactured sand 100% variation with a dust rating of 1 for SA 1.0 and a dust rating of 2 for SA 2.0. The 100% manufactured sand composition had a lower price compared to the other two variations. The use of a more dominant manufactured sand composition can influence the results of the sandblasting process. Thus, this research suggests that manufactured sand can be used as a substitute for silica sand in ship sandblasting.
Efek Likuefaksi Nickel Ore pada Stabilitas dan Olah Gerak Kapal MV. Nur Allya Putri, Fanny Darwani
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)
Publisher : Fakultas Teknik UPN Veteran Jakarta

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Abstract

Nickel ore liquefaction can cause the vessel to tip and sink in a short time due to the change in shape of the charge from solid to liquid. As a result, when the ship experienced a large shock, the cargo could not return to its original position. The purpose of this study is to determine the percentage composition between nickel in solid and liquid form with a total of 100% in the load chamber. The method used in this study was to analyze the effect of nickel ore fluidity on the stability and motion of MV ships. Nur Allya. The stability results of the ship are carried out in five cases, namely: 100% solid, 75% solid 25% liquid, 50% solid 50% liquid, 25% solid 75% liquid, and 100% liquid. The best result was obtained in case 1 with a maximum GZ value = 1.064 m. To prevent this incident, the study added a longitudinal bulkhead to the load chamber in all five cases. The results show a small increase in the increment in case 1 compared to case 5. Although the longitudinal bulkhead reduces the risk of liquefaction, the ship's cargo capacity is reduced. After that, an analysis of the movement of the ship was carried out such as: roll, pitch, and heave, showing the difference in response to the condition of the direction of the following sea, beam sea, and head sea waves. The biggest response occurred in the sea beam so that the seakeeping quality of the ship was getting worse. In this case, because the ship cannot dampen the exposure of the waves that hit the ship's body.
PENGARUH VARIASI PENEMPATAN BATERAI TERHADAP STABILITAS DAN OLAH GERAK PADA KAPAL NELAYAN BERTENAGA LISTRIK Atallah, Kemal Moza
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)
Publisher : Fakultas Teknik UPN Veteran Jakarta

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Abstract

Kapal nelayan yang ada saat ini umumnya masih menggunakan bahan bakar fosil sebagai sumber daya utama, dimana bahan bakar fosil diprediksi akan habis dalam 40-45 tahun mendatang serta dapat merusak lingkungan. Nelayan mulai didorong untuk menggunakan sumber energi lain salah satunya adalah listrik dengan baterai sebagai wadah penyimpanan. Baterai yang memiliki dimensi dan berat yang besar perlu dilakukan analisis penempatannya diatas kapal dan pengaruhnya terhadap stabilitas dan olah gerak pada kapal. Skripsi ini akan membahas hal tersebut pada kapal nelayan di wilayah Kabupaten Morowali Utara dengan membagi 42 baterai yang digunakan menjadi 2 sampai 3 blok dan menempatkan blok-blok tersebut pada posisi yang berbeda beda dan menghasilkan 3 variasi penempatan baterai dengan masing-masing adalah VaB1,VaB2, dan VaB3. Serta dengan 3 kondisi muatan yang berbeda-beda. Simulasi stabilitas yang dilakukan pada perangkat lunak maxsurf stability menunjukkan bahwa VaB1 memiliki luasan area dibawah kurva stabilitas 3% lebih besar dibanding VaB1 dan VaB2. Sementara untuk simulasi olah gerak kapal pada perangkat lunak ansys AQWA menunjukkan bahwa VaB3 memiliki nilai RAO yang lebih konsisten dibandingkan VaB1 dan VaB2 dan dapat diasumsikan berdasarkan hasil tersebut bahwa VaB3 merupakan variasi paling optimal. Jika olah gerak dan stabilitas kapal diperhitungkan secara bersamaan maka variasi paling optimal adalah VaB3 karena memiliki olah gerak yang konsisten dan stabilitas yang baik meskipun tidak sebaik milik VaB1.
Analisis Efisiensi Propeler Dengan Desain Bilah Melingkar Anugerah Putra, Bima; Ashfi Rayhan, Fajri
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)
Publisher : Fakultas Teknik UPN Veteran Jakarta

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Abstract

The toroidal propeller, characterized by its circular blade shape, has gained attention for its potential benefits, including increased efficiency and reduced noise levels. Despite its advantages, limited scientific literature exists on toroidal propeller research, predominantly relying on field experiments. This study seeks to assess the toroidal propeller's performance by comparing it to a conventionally shaped propeller with similar geometric parameters. Parameters such as propeller diameter, number of blades, hub diameter, and blade front view are adjusted in the conventional propeller model to mimic the toroidal design. The pitch parameter of the conventional propeller is varied to explore its ability to match the efficiency of the toroidal propeller. Utilizing Computational Fluid Dynamics (CFD) simulations through Simscale software, propeller models are evaluated across a range of RPM (1000 - 6000). The simulations yield thrust and torque values, subsequently used to calculate efficiency. Results indicate that thrust and torque increase with higher pitch and RPM. Interestingly, a variation of the conventional propeller with a pitch of 171.45 mm demonstrates superior efficiency compared to the toroidal propeller, albeit with lower thrust. Visualization of fluid flow on each model reveals optimal flow in the toroidal propeller, devoid of vorticity. This study enhances understanding of toroidal propellers, offering insights that contribute to the ongoing development of this technology.
PERBANDINGAN EFEKTIFITAS DAN EKONOMIS PEKERJAAN OVERHAUL MESIN DARI 3 INDUSTRI MARITIM DENGAN SKALA BESAR, MENEGAH, DAN KECIL wafa dwi ari salman
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024): Applied Science and Technology on Naval Engineering (ASTNE)
Publisher : Fakultas Teknik UPN Veteran Jakarta

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Abstract

In operation, ships have various components. Machinery is a component that has an important role so that ships can move and operate. Therefore, maintaining the performance and condition of ship engines is a must, so that it does not have an impact on ship operations. For this reason, ship owners must carry out routine maintenance and repairs, known as overhauls. In carrying out overhaul activities. On this basis, there are various companies in the maritime industry sector that focus on maintenance or overhaul of ship engines, both in large, medium and small scale maritime industries. The effectiveness of the overhaul process will be assessed using the OEE (Overall Equipment Effectiveness) method and for Looking for economics, the markup pricing method is used and they will be compared with each other to find out who is the most economical. Keywords: Ship, Machinery, Overhaul, Effectiveness, Economical

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