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All Journal International Journal of Marine Engineering Innovation and Research Applied Science and Technology on Naval Engineering
Berlian Arswendo Adietya
Universitas Diponegoro
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Study and Analysis of the Performance of the Propulsion System of the K-61 Type Amphibious Vehicle for Artillery Transport (KAPA) Good Rindo; Ahmad Fauzan Zakki; Farell Elghifari Putratama; Berlian Arswendo Adietya; Sapto Wiratno Satoto
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 1 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.4732

Abstract

The application of waterjet propulsion systems in amphibious combat vehicles, such as the KAPA Type K-61 used by the Indonesian National Armed Forces (TNI) for transporting artillery munitions, is crucial for enhancing operational performance. The working principle of a waterjet involves drawing water from beneath the vehicle's hull, accelerating it through a pump, and expelling it to generate thrust. The design of the waterjet propulsion system significantly impacts the thrust produced. This study aims to evaluate the maximum performance achievable by the waterjet propulsion system of the KAPA Type K-61. The analysis is conducted using various Index Velocity Ratio (IVR) values, including IVR 0.28, which represents the current speed of the KAPA Type K-61, and other variations such as IVR 0.54, 0.59, 0.67, 0.70, 0.78, 0.94, 1.18, 1.64, and 2.38. The analysis results include the thrust value produced at the waterjet outlet, efficiency, and propulsion power. The study found that at an IVR of 2.38, the system produced the highest thrust of 30.72 N, with a propulsion power of 7315.13 Watts, equivalent to 9.95 Horsepower, and the highest efficiency of 99.21%. Based on the research conducted, it is recommended that future studies create a geometric model of the KAPA Type K-61 with original and more detailed dimensions and perform a 1:1 scale analysis to strengthen the obtained results. Additionally, analyzing the waterjet propulsion system along with the impeller or propeller system is also suggested to gain a more comprehensive understanding of the overall propulsion system's performance and efficiency.
The Feasibility Study of Rectangular Floating Solar Panel Motion in Semangka Bay Waters Berlian Arswendo Adietya; Yudy Gunawan; Ahmad Fauzan Zakki; Ocid Mursid; Tuswan
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 1 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.4738

Abstract

With the depletion of mineral resources in Indonesia, the need for effective renewable energy alternatives has become critical. Solar energy, harnessed through photovoltaic panels, presents significant potential. However, the widespread adoption of solar panels remains limited due to their large land area requirements and susceptibility to damage. Floating solar panels, installed on water surfaces, offer a promising solution by enhancing energy efficiency through natural cooling while addressing land constraints. This study aims to analyze the motion dynamics of floating solar panels in Semangka Bay and identify the most effective design for open water conditions. Three models were tested: rectangular, kite-shaped, and perforated, using 3D simulation software. The analysis focused on the Response Amplitude Operator (RAO) under regular wave conditions at a 180° angle. The results revealed that Model 3, with 8 mooring points, exhibited the best performance in mitigating rolling, pitching, and heaving motions. The maximum rolling value reached 826.24 cm at 81 seconds, with a minimum of -735.36 cm at 86.7 seconds. Pitching peaked at 390.30 cm at 61.4 seconds and fell to -376.42 cm at 63.9 seconds. Heaving values ranged from a maximum of 17.64 cm at 62.8 seconds to a minimum of -220.94 cm at 83 seconds. This study concludes that Model 3 with 8 moorings offers superior stability, making it the optimal design for floating solar panels in open waters like Semangka Bay. By addressing environmental and implementation challenges, this research contributes significantly to advancing floating solar energy technology in Indonesia. The findings highlight the potential of efficient and resilient designs to harness Indonesia’s abundant solar energy resources effectively.
The Application of Grasshopper to Redesign Ship Hulls with a Parametric Approach Method Based on Delftship Reference Eko Sasmito Hadi; Good Rindo; Berlian Arswendo Adietya; Muhamad Riza Alifviar; Hartono Yudo
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4826

Abstract

More than a year has passed since Francisco Pérez-Arribas (2023) introduced a parametric-based hull design method using Python scripts, beginning with the cross-sectional area (CSA) design. Several experimental studies have been carried out to improve the method and the quality of ship design. This study aims to generate an optimal hull design by utilizing normal vectors derived from the x and y vectors. These normal vectors are applied parametrically to determine the shape of the hull. The study also employs a cubic spline-based parametric technique for designing yacht hulls. The purpose of this study is to introduce the concept of parametric design through the development of visual programming used to form cross-sectional area curves and generate hull geometry. This study also discusses both the advantages and limitations of using visual programming approaches to accelerate the design process. By varying the CSA shape of the DelftShip model, the resulting parametric model has a high level of accuracy, with a difference of - 0.097016% in LCB and -0.28785% in volume when compared to the DelftShip model. results from Grasshopper reveal significant differences, particularly below a draft of 0.475, where the CP values from Grasshopper are lower than those from DelftShip. The parametric approach using normal vectors not only facilitates design exploration but also holds the potential to enhance overall hull design quality and optimization.
Analysis of the Structural Response of a 2919 GT Ro-Ro Ship Due to Changes in Hull Construction Length Imam Pujo Mulyatno; Ahmad Fauzan Zakki; Kukuh Prakoso Wicaksono; Berlian Arswendo Adietya; Tuswan Adietya
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4837

Abstract

On the 2919 GT Ro-Ro vessel, structural geometry changes, specifically in the Length Between Perpendiculars (LPP) with additional framing, lead to variations in loading and maximum stress, in accordance with Biro Klasifikasi Indonesia (BKI) regulations in Volume II. Finite Element Method analysis reveals structural responses, particularly in the parallel middle body section. Initially, the vessel was 10.5 meters long to support loads of seven 20-foot trucks; modifications increased this to 13.5 meters for loads of seven 40-foot trucks and 18 meters for a combination of 20-foot and 40-foot truck loads. The analysis results indicate significant differences in the vessel’s maximum structural stress under truck-loaded conditions. For lengths of 10.5 meters, 13.5 meters, and 18 meters, the stresses remain within safe limits under all conditions (Calm Water, Sagging, and Hogging), with (sigma)ult lower than the allowable as set by BKI. However, the 18-meter length exhibits maximum stress approaching the safe threshold in the Hogging condition, with (sigma)ult = reaching 243.4 MPa, suggesting structural modifications are required to ensure vessel safety.
Application of Time Cost Trade Off Method in Optimizing Time and Cost on Ship Refurbishment Projects KMP Dharma Rucitra 1 and MT Triaksa 17 Imam Pujo Mulyatno; Hani Niswa Humaida; Wilma Amiruddin; Berlian Arswendo Adietya; Hartono Yudo
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4844

Abstract

Delays that occur in the KMP Dharma Rucitra 1 ship refurbishment project have an impact on the MT Trikasa 17 ship refurbishment project, so that the project work must be accelerated in order not to exceed the contract. This study aims to overcome the delays that occur by finding the most optimal time acceleration value and the minimum cost. The time cost trade off method is often used in scheduling the repair of two or more ship units simultaneously to optimize project time and cost, so this method is considered to be able to overcome the problems that occur. Based on the repair list and main schedule data, the critical trajectory and productivity values of each job were obtained. The work on the critical trajectory was treated with variations of additional working hours (overtime) and variations of additional workers. The analysis shows that the addition of working hours (overtime) provides effective results, namely the addition of 1 working hour (overtime) with a reduction in time by 12.5% and a cost of Rp. 253,236,000 (4.35% increase). While the addition of labor provides effective results, namely the addition of 4 workers with a 25% reduction in time and costs of Rp. 245,140,000 (0.78% increase). Based on the two effective results, the most efficient result to overcome the delays that occur is the addition of 4 workers.
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.
Co-Authors Ahmad Fauzan Zakki Ardi Nugoho Yulianto Ardiansyah Musa Efendi Danu Utama Eko Sasmito Hadi Farell Elghifari Putratama Good Rindo Hani Niswa Humaida Hartono Yudo Imam Pujo Mulyatno Kukuh Prakoso Wicaksono Muhamad Riza Alifviar Ocid Mursid Raybonda Reinaldi Winarko Roisul Fadli Ahmad Sapto Wiratno Satoto Sheely Leony Artha Pasaribu Tuswan Tuswan Adietya Wilma Amiruddin Yudy Gunawan