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Applied Science and Technology on Naval Engineering
Published by Universitas Pembangunan Nasional Veteran Jakarta
ISSN : 30318866     EISSN : 30318866     DOI : 10.54378
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 6 Documents
 1 
Search results for , issue "vol 4 no 2 (2026)" : 6 Documents clear
Analysis Of The Use Of Fiber-Metal Laminates Material To Reduce Vibrations In L-Extension Type Pedestals Using Finte Element Method Mochammad Haiqal Bagaskara; Noverdo Saputra
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.06

Abstract

Excessive engine vibration can significantly degrade ship structural durability. This study investigates the application of Fibre-Metal Laminates (FMLs) on an L-extension pedestal to enhance vibration isolation using the impedance mismatch principle. Using Finite Element Analysis (FEA) via Abaqus, various composite inserts (GFRP, CFRP, UD-CFP) and their placement locations were evaluated. The baseline steel pedestal generated a Total Vibration Level Drop of 21.187 dB and a maximum von Mises stress of 28.62 MPa. Modifying the overall structure effectively maximized vibration energy dissipation. Although the 5-layer GFRP yielded the highest damping with 32.013 dB, it triggered extreme local stress 42.65 MPa. Therefore, the 3-layer AL/UD-CFP/AL configuration on the overall structure is the most optimal variation, successfully balancing excellent damping efficiency with 30.098 dB with the safest structural stress limit 33.71 MPa.
Ship Manuvering Analysis Using Virtual Captive Model Test On Trim And Sinkage Variations Audi Razif Santoso; Fakhri Akbar Ayub
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.05

Abstract

This study evaluates the effect of trim and sinkage variations on ship hydrodynamic characteristics using the Virtual Captive Model Test (VCMT) based on Computational Fluid Dynamics (CFD) for the KRISO Container Ship (KCS) model. Simulations were conducted for sinkage variations of −0.00090, −0.00275, and −0.00599 and trim variations of 0.017°, 0.053°, and 0.097°, over drift angles ranging from 2° to 10° under two speed conditions represented by Froude numbers 0.152 and 0.163. The objective is to investigate the influence of trim and sinkage on lateral force (sway) and yaw moment and to determine hydrodynamic coefficients using the Least Squares regression method. The results show that trim and sinkage influence sway force and yaw moment, although their effects are smaller than those of speed and drift angle. Increased sinkage generally produces higher sway force and yaw moment due to increased wetted surface area and changes in hull pressure distribution, while trim mainly alters the longitudinal pressure distribution with relatively limited influence within the investigated range. The maximum nondimensional values of Y′ and N′ were obtained at Fr = 0.163 and a drift angle of 10° (Y′H = 0.206543 and N′H = 0.079192 for sinkage variation; Y′H = 0.202338 and N′H = 0.073965 for trim variation). The hydrodynamic forces and moments were nondimensionalized using the Yoshimura–Masumoto formulation and analyzed through Least Squares regression, yielding coefficients that agree well with the simulation results. The VCMT-based CFD approach combined with Least Squares regression provides an effective alternative for determining ship maneuvering hydrodynamic coefficients.
Computer Aided Design (CAD) Based Approach for Ship Hull Geometry Modelling from Offset Data Using B-Spline Curves Ardi Nugoho Yulianto; Sheely Leony Artha Pasaribu; Raybonda Reinaldi Winarko; Roisul Fadli Ahmad; Berlian Arswendo Adietya; Danu Utama; Ardiansyah Musa Efendi; Sapto Wiratno Satoto
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.01

Abstract

Indonesia, as an archipelagic country, requires the development of efficient and independent ship design technologies. This study aims to develop a B-spline-based computer aided design (CAD) program for modelling ship hull geometry from offset data and calculating basic hydrostatic parameters. The offset data are defined as fit points at each station and processed to determine the corresponding control points for generating B-spline section curves. The resulting station curves are then arranged along the longitudinal direction to form the hull geometry. Hydrostatic calculations are performed by evaluating the station curves, determining the submerged sections at a specified draft, calculating the submerged sectional areas, and integrating them along the ship length. The calculated parameters include submerged volume, displacement, Longitudinal Center of Buoyancy (LCB), Length of Waterline (LWL), and Waterplane Area (WPA). The developed program is validated using a ship model template from commercial software by comparing both hull geometry and hydrostatic results. The validation shows deviations under 0.2% for the simple curve test and under 0.35% for the hydrostatic parameters of the selected hull model. These results indicate that the developed program has the potential to serve as a local CAD alternative for preliminary hull modeling and basic hydrostatic calculations.
Analysis and Structural Improvement of the KMP Portlink III Bow under Collision Loads Using the Finite Element Method Yeremia Parasian Christover Manurung; Wiwin Sulistyawati
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.04

Abstract

Ship collision accidents can cause severe damage to the bow structure, as it is the first part of the vessel to receive impact loads. This study aims to analyze the structural response of the bow of KMP Portlink III under collision loads and to evaluate the effectiveness of adding carlings in improving structural strength. The bow structure was modeled using Autodesk Fusion, while the numerical analysis was carried out using Autodesk Inventor based on the Finite Element Method (FEM). The analysis was conducted on four design configurations, namely the original design, horizontal carling, vertical carling, and combined carling, with loading variations of 100%, 104%, 106%, 108%, and 110% of the initial collision load of 1,191,900 N. The evaluated parameters included Von Mises stress and safety factor. The results indicate that increasing the collision load leads to higher Von Mises stress and lower safety factor values. The addition of carlings effectively reduced the maximum stress and increased the safety factor, with the combined carling design providing the best structural performance in improving the bow's resistance to collision loads. Keywords: collision load, Finite Element Method, Von Mises stress, safety factor, carling.
Injection Timing Effect on Emisson Characteristic of a Dual-Fuel Diesel Engine Dyas Isnaen Ilham; Fathin Muhammad Mahdhudhu
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.03

Abstract

The maritime industry is facing increasingly stringent emission regulations, driving the development of cleaner combustion technologies such as dual-fuel diesel engines fueled by natural gas. Among various operational parameters, pilot diesel injection timing plays a crucial role in determining combustion characteristics and exhaust emissions. This study numerically investigates the effect of Start of Injection (SOI) on the emission characteristics of a methane dual-fuel diesel engine using three-dimensional computational fluid dynamics (CFD) simulations in ANSYS Forte. A 45° sector model with a re-entrant piston bowl geometry was employed to represent the combustion chamber while maintaining computational efficiency. The simulations were conducted at an engine speed of 1335 rpm by varying the pilot diesel SOI from −37.5° to −27.5° CA bTDC. The results indicate that retarding the injection timing significantly increases incomplete combustion products, with CO emissions rising from 3314.75 ppm to 11989.00 ppm and UHC emissions increasing from 490.87 ppm to 2557.44 ppm. Conversely, NOx emissions decrease from 938.59 ppm to 479.03 ppm because delayed combustion reduces the peak in-cylinder temperature and suppresses thermal NOx formation. These findings demonstrate a clear emission trade-off associated with injection timing, where reducing NOx is accompanied by increases in CO and UHC emissions. Therefore, an appropriate SOI should be selected to achieve a balanced compromise between combustion efficiency and exhaust emission performance in methane dual-fuel diesel engines.
Mechanical Characteristics of Pineapple Leaf Fiber and E-Glass Hybrid Composites as an Alternative for Boat Hulls Mohammad Arbeel Falaah; Amir Marasabessy
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.02

Abstract

The transition toward sustainable and eco-friendly materials in the maritime sector has accelerated research intonatural fiber-reinforced composites as potential alternatives to conventional structural materials. This study rigorouslyevaluates the mechanical characteristics of a hybrid sandwich composite structure, strategically incorporatingPineapple Leaf Fiber (PALF) as the core and E-Glass fiberglass as the outer skins. The composite matrix utilizes anepoxy resin modified with 1 gram of Aerosil nanofiller to enhance interfacial adhesion and resin viscosity. To optimizethe fiber-matrix compatibility, the PALF was subjected to varying concentrations of alkaline treatment using SodiumHydroxide (NaOH) solutions at 0%, 5%, 10%, and 15% for a duration of 2 hours. The fabrication of the test specimenswas conducted using the hand lay-up method, ensuring uniform resin distribution and minimizing void formation.Comprehensive mechanical characterizations were performed, including tensile testing in accordance with the ASTMD3039 standard and flexural testing following the ASTM D7264 standard.The experimental results unveiled a distinct bell-shaped performance curve for tensile strength relative to the NaOHconcentration. The optimal Ultimate Tensile Strength (UTS) was achieved at the 10% NaOH variation, recording apeak value of 77.33 MPa. This substantial enhancement is attributed to the optimal delignification process, whichincreased fiber surface roughness and promoted mechanical interlocking without damaging the cellulose structure.Conversely, the 15% NaOH treatment led to a significant degradation of the cellulose microfibrils, plummeting theUTS to 34.00 MPa. In contrast, the flexural test results demonstrated that the maximum Ultimate Flexural Strength(UFS) occurred in the untreated (0% NaOH) variation at 115.00 MPa, with the 10% NaOH variation closely followingat 108.33 MPa. This behavior indicates that the flexural properties of the sandwich composite are predominantlygoverned by the high-stiffness E-Glass outer skins rather than the core material. Finally, the structural viability of thecomposites was assessed against the stringent regulations established by the Indonesian Bureau of Classification (BKI)for small-to-medium fiberglass boat hulls, which mandate a minimum tensile strength of 43.12 MPa. The findingsconfirm that only the 10% NaOH treated hybrid composite successfully surpasses this regulatory threshold, renderingit a highly promising and sustainable alternative material for marine hull construction.

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