Applied Science and Technology on Naval Engineering
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.
Articles
29 Documents
<![CDATA[Analisis Pengaruh Anti Kavitasi Terhadap Kavitasi Pada Sea Chest Valve Di Kapal ]]>
<![CDATA[Fatih izzudin daffa]]>;
<![CDATA[Fathin Muhammad Mahdhudhu]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 1 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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<![CDATA[Kavitasi pada valve merupakan fenomena yang sering terjadi di lingkungan kapal yang dapat menyebabkan kerusakan pada sistem perpipaan dan komponen terkait. Para owner kapal kerap menganggap sepele permasalahan kavitasi ini sehingga valve kerap tidak beroperasional dengan baik karena terjadinya kavitasi. Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan teknologi anti kavitasi terhadap fenomena kavitasi pada Sea Chest Valve. Metode yang digunakan meliputi pengumpulan data lapangan dari kapal yang beroperasi secara rutin, serta simulasi menggunakan software Valvstream untuk mengetahui efektivitas penambahan trim anti kavitasi. Studi ini bertujuan untuk menganalisis efektivitas Trim anti kavitasi pada Sea Chest Valve dengan variasi pressure, temperature, sound level, dan viscosity serta membuat prototype valve yang terpasang trim anti kavitasi. Analisis simulasimenunjukkan bahwa penurunan tekanan, kenaikan temperature, sound level yang tinggi dan viscosity yang tinggi sebagai indikator terjadinya kavitasi dapat berkurang dengan ditambahkan nya anti kavitasi. Penelitian ini memberikan kontribusi dalam memahami mekanisme kavitasi pada aplikasi Sea Chest Valve di kapal serta memberikan rekomendasi untuk pengembangan teknologi anti kavitasi di masa depan. Implikasi praktis dari penelitian ini adalah potensi untuk meningkatkan keandalan dan masa pakai sistem perpipaan pada kapal, serta mengurangi terjadinya kavitasi.]]>
<![CDATA[Analisis Stabilitas Fasilitas Loading Unloading Crane dan Ship Loader pada Kapal Konversi ]]>
<![CDATA[Jihad Pramayoga]]>;
<![CDATA[Wiwin Sulistyawati]]>;
<![CDATA[Amir Marasabessy]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11770
<![CDATA[Kapal MV. Ratu Damai, yang awalnya dirancang sebagai bulk carrier, telah mengalami konversi menjadi Floating Loading Facility (FLF). Konversi ini melibatkan penambahan struktur dan peralatan bongkar muat yang signifikan, yang berpotensi memengaruhi stabilitas kapal secara keseluruhan. Penelitian ini bertujuan untuk menganalisis stabilitas MV. Ratu Damai pasca konversi, dengan fokus pada dampak penambahan alat bongkar muat terhadap parameter stabilitas statis dan dinamis. Metode yang digunakan meliputi perhitungan stabilitas berdasarkan data dimensi kapal, bobot, dan posisi pusat gravitasi (KG) sebelum dan sesudah konversi, serta simulasi berbagai kondisi pemuatan dan operasional. Hasil analisis diharapkan dapat mengidentifikasi perubahan karakteristik stabilitas, menilai kepatuhan terhadap regulasi maritim yang berlaku, dan memberikan rekomendasi untuk memastikan keselamatan operasional kapal.]]>
<![CDATA[Studi Dampak Perairan Dangkal terhadap Gaya Lateral (Sway Force) dan Momen Berputar (Yaw Moment) Kapal ]]>
<![CDATA[Rico]]>;
<![CDATA[Fakhri Akbar Ayub]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11786
<![CDATA[This study investigates the influence of restricted waters on the sway force (Y’H) and yaw moment (N’H) acting on a ship. We performed simulations using Computational Fluid Dynamics (CFD) on a 1:40 scale KRISO Container Ship (KCS) model, varying ship speed, water depth (1.3T and 1.6T), and drift angle (2°–10°). The simulation results indicate that both Y’H and N’H increase significantly as the water becomes shallower and the drift angle becomes larger. This phenomenon is attributed to the pressure imbalance around the ship's hull, caused by flow confinement. These findings are anticipated to provide valuable insights for safer and more efficient ship maneuvering, especially in narrow and shallow waterways. Keywords: restricted waters; bank effect; sway force; yaw moment; CFD]]>
<![CDATA[Optimalisasi Efisiensi Turbin Arus Laut Horizontal untuk Mendukung Kebutuhan Energi di Kawasan Pesisir Larantuka ]]>
<![CDATA[Indana Zulfatun Nikmah]]>;
<![CDATA[Fakhri Akbar Ayub]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11789
<![CDATA[This study aims to evaluate the energy conversion efficiency of Horizontal Axis Tidal Turbines (HATT) by varying blade length and angle of attack (AoA), and to assess their potential application in the coastal region of the Larantuka Strait. Numerical simulations were performed using Computational Fluid Dynamics (CFD) across nine turbine configurations to determine torque and power coefficient (Cp). The turbine with a 1 m blade and 10° AoA achieved the highest Cp value of 0.68. Meanwhile, the turbine with a 2 m blade and the same AoA, despite having a slightly lower Cp (0.66), produced the highest annual energy output of 737,619.7 kWh. With a net power output of 140.65 kW, approximately four units of this turbine are required to supply around 10% of Larantuka’s annual electricity demand. The selection of the optimal turbine model is based on a multi-objective approach that balances efficiency and energy output. These findings highlight the strong potential of tidal turbines as a renewable energy solution in eastern Indonesian coastal areas.]]>
<![CDATA[Analisis Penerapan Metode Value Stream Mapping Pada Proses Bongkar Muat Kapal Container Untuk Meningkatkan Efisiensi Waktu Pada Pelabuhan Sunda Kelapa PT. Pelabuhan Indonesia (Pelindo) ]]>
<![CDATA[Dwiki Faris Alamsyah]]>;
<![CDATA[Amir Marasabessy]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11792
<![CDATA[The cargo container unloading and loading process is a critical component in port operations, significantly impacting logistical efficiency and operational costs. This study aims to analyze the application of Value Stream Mapping (VSM) to enhance time efficiency in loading and unloading activities at PT. Pelabuhan Indonesia (PELINDO). Inefficiencies in these processes often result in vessel departure delays, increased berthing times, and elevated operational expenditures. Using a quantitative approach, this research gathers primary data through direct field observations and interviews with key stakeholders at Tanjung Priok Port, supported by secondary data on vessel departure delays. The findings reveal multiple non-value-added activities and process waste contributing to inefficiencies. Based on VSM analysis, proposed improvements led to a significant reduction in process cycle time and enhanced overall port operational efficiency. The implementation of VSM proves to be an effective lean tool in streamlining container handling operations. These findings offer practical contributions to PT. Pelabuhan Indonesia in boosting performance and competitiveness, while also serving as a reference for future maritime logistics studies. Keywords: Value Stream Mapping; Time Efficiency; Loading and Unloading; Port Operations; Lean Manufacturing.]]>
<![CDATA[Studi Kekuatan Struktur Deck Crane Barge Terhadap Beban Knuckle Boom Crane dan Hydraulic Crane dengan Pendekatan Metode Elemen Hingga ]]>
<![CDATA[Muhammad Aysar Santoso Santoso]]>;
<![CDATA[Wiwin Sulistyawati]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11795
<![CDATA[This study aims to evaluate the structural strength of a crane barge deck under the loading of two types of cranes: the Knuckle Boom Crane and the Hydraulic Crane. The evaluation is conducted using the numerical Finite Element Method (FEM) with the assistance of Maxsurf Multiframe software. The main focus of the analysis is to assess the effects of crane type, boom position variation (working radius), and deck plate thickness on stress distribution and bending moment in the deck structure. The structural model used is based on an actual design of a crane barge from PT Baramulti, with dimensions adjusted to the limitations of the student version of the software. Loading scenarios were applied incrementally from 0 to 30 tons, and the results were assessed by comparing them against allowable stress limits set by the Indonesian Classification Bureau (BKI). The simulation results show that large-capacity cranes, such as the 60T Knuckle Boom Crane, generate stress levels exceeding BKI safety limits. However, after structural reinforcements were applied—such as the addition of stiffeners, increasing deck plate thickness, and changing the material to AH36—the maximum stress was reduced by approximately 26%, restoring structural safety under loads up to 20 tons. This research highlights the importance of structural design that considers crane type, actual load conditions, and material specifications to ensure the operational safety of crane barges.]]>
<![CDATA[Optimasi Desain Pipa Hisap pada Kapal TSHD Freeway Melalui Aplikasi Pipa Spiral untuk Reduksi Penurunan Tekanan Aliran Lumpur Air-Pasir: Bahasa Indonesia ]]>
<![CDATA[Muhamad Afrizal]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v3i2.11799
<![CDATA[Studi ini melakukan analisis komparatif performa hidrodinamika pipa konvensional dan pipa spiral untuk aliran fluida non-Newtonian dalam sistem perpipaan. Metodologi meliputi pemodelan geometri dengan SolidWorks dan simulasi Komputasi Dinamika Fluida (CFD) menggunakan ANSYS Fluent untuk evaluasi penurunan tekanan. Validasi model numerik terhadap data eksperimen terdahulu mengkonfirmasi kemampuannya dalam memprediksi perilaku rheologi fluida. Hasil penelitian menunjukkan bahwa pipa spiral secara konsisten meminimalkan penurunan tekanan dibandingkan pipa konvensional pada kondisi horizontal, suatu keuntungan yang dikaitkan dengan peningkatan distribusi partikel dan reduksi gesekan akibat secondary flow. Meskipun kemiringan pipa 6,76o meningkatkan pressure drop secara keseluruhan, pipa spiral mempertahankan keunggulannya di sebagian besar skenario. Namun, observasi menunjukkan adanya titik di mana pressure drop pipa spiral dapat mendekati atau melampaui pipa konvensional pada kecepatan tinggi dan fraksi volume tertentu, menandakan adanya dinamika multi-parameter yang kompleks. Temuan ini penting untuk perancangan dan optimalisasi sistem perpipaan fluida non-Newtonian di sektor teknik perkapalan. Kata kunci: Pipa spiral; Pipa konvensional; Fluida non-Newtonian; Penurunan tekanan]]>
<![CDATA[Performance Analysis of a Contra-Rotating Propeller with a Toroidal Blade Model ]]>
<![CDATA[Muhammad Arju Muhafiz]]>;
<![CDATA[Fajri Ashfi Rayhan]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 4 No 1 (2026) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v4i2.13475
<![CDATA[This research analyzes the performance of contra-rotating propellers (CRP) with toroidal blade designs and compares them to conventional CRPs to evaluate propulsion efficiency. The study is motivated by the maritime sector's need for more efficient and reliable propulsion systems. The methodology employed is Computational Fluid Dynamics (CFD) simulation, utilizing variations in RPM (1000–3000) and pitch (228.6–336 mm) to test relevant operational conditions. Key findings indicate that the contra-rotating toroidal propeller generates 16% higher thrust (reaching 3193 N at 3000 RPM) and an average thrust coefficient (KT) of 0.47, which is 17% higher than conventional CRPs. However, the efficiency of the contra-rotating toroidal propeller (average 68,7%) was 9,6% lower than the conventional CRP with a 264 mm pitch (78.31%), despite its superior absolute thrust. Fluid flow contour analysis suggests that the toroidal propeller's circular blade design creates a more stable flow pattern. The significance of this research lies in highlighting the substantial potential of contra-rotating toroidal propellers in boosting propulsion thrust, though further optimization is required for efficiency. These findings underscore the necessity for refining geometric parameters like skew and rake. This study provides a crucial foundation for the development of innovative propellers that combine the advantages of contra-rotating systems and toroidal designs, promoting more efficient and reliable propulsion solutions in the future. Keywords: Toroidal propeller, contra rotating propeller, propulsion efficiency]]>
<![CDATA[ANALYSIS OF INTERCEPTOR POSITION VARIATIONS TO OPTIMIZE THE EFFECT OF RESISTANCE ON A CATAMARAN ]]>
<![CDATA[Ahmad Fadil Rahman]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 4 No 1 (2026) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v4i2.13482
<![CDATA[Catamarans are multihull vessels that offer superior stability and lower resistance potential compared to monohull ships. For high-speed vessels, one method commonly used to reduce hydrodynamic resistance is the installation of an interceptor at the stern. This study aims to analyze the effect of interceptor position variations on the total resistance of a catamaran using the Computational Fluid Dynamics (CFD) method. The interceptor configurations investigated include no interceptor, full interceptor, partial near keel, and partial near side. Simulations were conducted using ANSYS Fluent with variations of Froude numbers 0,6; 0,8; 1,0; 1,2. The results indicate that total resistance increases with increasing Froude number. Among the configurations studied, The use of a full interceptor provides the lowest total resistance value with a resistance value of 13.9 N compared to other variations, although the difference is relatively small with a decrease in the resistance value of around 1,03%.. Therefore, it can be concluded that the full interceptor is the most optimal configuration for reducing the total resistance of a catamaran under the conditions examined in this study]]>
<![CDATA[Cavitation Analysis of a Propeller Based on Variations in Water Temperature and Propeller Rotational Speed Using CFD Simulation ]]>
<![CDATA[Dian Febriyanti]]>
<![CDATA[ Applied Science and Technology on Naval Engineering Vol 4 No 1 (2026) ]]>
Publisher : <![CDATA[Fakultas Teknik UPN Veteran Jakarta ]]>
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DOI: 10.54378/astne.v4i2.13485
<![CDATA[This study aims to understand how the cavitation phenomenon occurs in ship propellers by varying the water flow temperature and propeller rotation speed. Cavitation is a condition in which fluid pressure decreases to below vapor pressure, so that vapor bubbles are formed that can damage the propeller surface. Therefore, it is important to conduct an analysis to find out where cavitation first appears and how it affects the thrust generated by the propeller. This study uses Computational Fluid Dynamics (CFD) software. Variations in temperature and rotational speed are applied to see the differences in the results of the propeller thrust coefficient values in each condition. The simulation results show that changes in fluid temperature do not have a significant effect on the occurrence of cavitation. However, increasing the propeller rotational speed clearly increases the potential for cavitation. At a speed of 800 RPM cavitation has not been seen, either at temperatures of 17oC, 21oC, and 30oC. However, at a speed of 1600 RPM cavitation appears, both at temperatures of 17oC, 21oC, and 30oC. This shows that temperature does not have a significant effect, but rotational speed is a very influential factor in the process of cavitation and propulsion efficiency.]]>
