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M. Uswah Pawara
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Gedung B306. Jl. Soekarno Hatta No.KM 15, Karang Joang, Kec. Balikpapan Utara, Kota Balikpapan, Kalimantan Timur 76127
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INDONESIA
Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Published by Institut Teknologi Kalimantan
ISSN : -     EISSN : 3025518X     DOI : https://doi.org/10.35718/ismatech.v1i1
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
Focus and Scope Research titles encompassed by this journal include, but are not limited to: Naval Architecture: covering ship strength, Ship Hydrodynamics, Ship Construction, Ship Production Management, Wooden and FRP Ship Materials, Ship Design Innovation, Ship Vibration and Noise, Welding Technology, Fatigue, Sea Transportation, Computational Fluid Dynamic Modeling. Marine Engineering: encompassing Engine Performance, Renewable Fuels, Dual fuel system, Ship electricity, Ship Resistance, Ship piping systems, Ship reliability). Ocean engineering: Marine and Offshore Structures, Coastal Structures and Management, Port Structures and Management, Subsea Umbilicals, Risers and Flowlines (SURF), Ocean Renewable Energy, Marine Instrumentation, Marine Pollution. Mechanical engineering: addressing Tribology, Energy Studies, Engines and Turbines, Heat Transfer, Fluid Mechanics, Lubrication and Wear, Materials Science, Mechatronics, Refrigeration and air conditioning, Pressure analysis, Structural and mechanical design, Renewable energy, Structural mechanics, Thermodynamics, Materials processing, Vibration).
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 41 Documents
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Analysis of Shielded Metal Arc Welding (SMAW) with Current Variations Against Tensile Strength, Bending Strength, and Microstructure of API 5L X52 Matin, Qowi; Haliq, Ridhwan; idhil ismail, andi; Jamil, Muchammad
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1055

Abstract

This study aims to analyze the effect of current variations on the V seam with a seam angle of 37.5° on the testing of mechanical properties and the appropriate welding method as a connector for two API 5L X52 materials using the Shielded Metal Arc Welding (SMAW) welding method. The current variation used is (70, 100, 115 A) in Sample A, the current variation is (70, 120, 130 A) in Sample B, and the current variation is (70, 125, 130 A) in Sample C. After the welding process is carried out, the samples are then tested for tensile, bending, observing macro structures, and microstructures. The test results obtained the highest value of tensile testing on current variations (70, 125, 130 A) with a value of 715.4 MPa, while the lowest value on current variations (70, 100, 115 A) with a value of 596.66 MPa. The results of the bending test show that the highest value is obtained in the current variation (70, 125, 130 A) with a value of 1417.93 MPa, while the lowest value is obtained in the current variation (70, 100, 115 A) with a value of 1289.01 MPa. The results of metallographic testing showed that the microstructure data on variations in the welding current strength of (70, 100, 115 A), (70, 120, 130 A), and (70, 125, 130 A) resulted in a phase that composed of ferrite and pearlite. The microstructure formed is influenced by the magnitude of the welding current used. The results of macro observations obtained porosity in the weld metal area.
Analysis of Gross Tonnage (GT) Capacity Installed On Traditional Wooden Ships In Penajam Paser Utara Manik, Aljoiden; Arifuddin, Andi Mursid Nugraha; Pawara, Muhammad Uswah; Nurcholik, Samsu Dlukha; Ikhwani, Rodlian Jamal
Indonesian Journal of Maritime Technology Vol. 1 No. 2 (2023): Volume 1 Issue 2, December 2023
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v1i2.1059

Abstract

To identify the GT of traditional wooden boats built at PPU, an investigation of the GT on the boat is carried out. The GT of the North Penajam Paser traditional wooden ship was identified using domestic regulations issued by the government through the Ministry of Transportation, PM No. 45 of 2021 and PP No. 85 of 2021 concerning PNBP of the Directorate General of Sea Transportation. Before being operated, every ship must be measured to determine the length, width, depth and tonnage of the ship in accordance with the ship measurement method. According to Law number 20 of 1997, "Non-Tax State Revenue (PNBP) is all Central Government revenue that does not come from revenues taxation". ship data studied for determining gross tonnage, Lpp: 17.76m, LoA: 21.90 m, Lwl: 19.06m, B: 4m, H: 2m, T: 1.40m, Cb: 0.50. Calculating ship tonnage or calculating gross tonnage and net tonnage has two methods, namely the empirical method and the analytical method. The analytical ship GT value is 14.16 and the empirical ship GT is 14.79. The total amount of PNPB on ships based on analytics is IDR 5,600,704.74. The total empirical PNPB amount is IDR 8,43,031.01. The difference between analytical and empirical PNBP is IDR 242,327.01. The difference between GT based on analytical and GT empirical methods is 0.63. the comparison level between the two methods is 4%.
Impact of Hull Breadth Modification on Tugboat Resistance: A Comparative Analysis Using Holtrop and CFD Methods As’ad, Miftachus Surur; Pawara, Muhammad Uswah; Ikhwani, Rodlian Jamal; Wulandari, Amalia Ika
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1062

Abstract

Estimating resistance experienced by a ship is crucial for determining the required engine power and fuel consumption to maintain a required speed. This study examines the comparative effects of altering the breadth of a tugboat from the approved initial design of 9 meters to a modified design of 8.6 meters, both utilizing the same engine power of 2x1018 HP. The analysis employs the Holtrop method, and Computational Fluid Dynamics (CFD). Using the Holtrop method, the largest differences at a speed of 14 knots were found to be 11.577 kN in resistance, 198.66 HP in engine power, and 0.617 g/kW.h in Specific Fuel Oil Consumption (SFOC), corresponding to a 5.141% difference in engine load. CFD results indicated the largest differences at 10 knots, with 9.009 kN in resistance, 102.47 HP in engine power, and 3.192 g/kW.h in SFOC, translating to a 5.034% difference in engine load. The modification of the breadth by 0.4 meters, while keeping the engine constant, impacts the resistance, engine power, and fuel consumption of the vessels.
Strength Evaluation of Combined New and Old Plates Welded Joint: Case of Anggada XV Tug Boat Nurcholik, Samsu Dlukha; Wahyuda, Wahyuda; Hidayat, Taufik; Arifuddin, Andi Mursid Nugraha; Kurniawati, Diniar Mungil; Saadiyah, Devy Setiorini; Awali , Jatmoko; Rohimsyah, Fikan Mubarok; Trimulyono, Andi; Kusuma, Andhi Indira
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1069

Abstract

Naval grade plate is designed for shipbuilding due to its strength. In the shipyard, old plates have been used because surplusage of the previous project. However, the mechanical properties of old plate compared to new plate have not been clarified yet. In this study, a comparative investigation shielded metal arc welding (SMAW) of old plate and new plate was performed. A spectroscopy test was used to obtain the chemical properties of the old plate and the new plate. Furthermore, tensile and hardness tests were performed to investigate the mechanical properties It was concluded that (1) the chemical properties of the old and new plates are almost similar and (2) the average value of tensile strength of the old-old plate, new-new plate, and new-old plate are 451.3, 487, 454,3 N/mm2, respectively. (3) then, the average hardness test of HAZ of old plate, new plate, and weld metal are 73.2, 78.3, 83.2 HRB, respectively. From the results, it can be concluded that using old plates for shipbuilding is still reliable.
Numerical Evaluation of Transversal Strength of Traditional Fishing Vessel in Penajam Paser Utara, East Kalimantan, Indonesia Pawara, Muhammad Uswah; Alamsyah; Arifuddin, Andi Mursid Nugraha; Tobing, Andreyano Yosefan Lumban; Hidayat, Taufik; Nurcholik, Samsu Dlukha; Syadzali, Abdul Mujib
Indonesian Journal of Maritime Technology Vol. 1 No. 2 (2023): Volume 1 Issue 2, December 2023
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v1i2.1070

Abstract

Challenges in procuring wood as the primary material for ships have led to a decline in overall quality. Meeting the demands of shipbuilding often involves neglecting consideration for the quality and characteristics of construction materials. Additionally, the shipbuilding process commonly overlooks technical and operational aspects associated with construction specifications. Ship damages frequently result from the selection of wood types, sizes, and ages that do not meet construction criteria or fall below the standards for achieving optimal construction. Many ship constructions are identified that fail to meet the requirements for ensuring the safety and security of the crew, ship, and cargo during operations. This research aims to numerically assess the transverse strength of fishing vessels operating in Penajam Paser Utara using Ansys software. Survey results indicate an average size of fishing boats in this area as 10 – 20  meters in length. 2.6 - 3.5 meters in width, and 1.6 – 2.5 meters in height. The stress analysis results from Ansys Workbench were recorded at 2.3402 MPa
Technical Study of Natural Fibers from Banana Fronds as Boat Component Material in Inland Waterways Wijaya, Vibra; Alamsyah, Alamsyah; Hijriah, Hijriah; Suardi, Suardi; Pawara, Muhammad Uswah
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1125

Abstract

Many types of bananas are grown in Indonesia, indicating that it is one of the banana producing countries. Banana leaves are processed to make them stronger and more easily absorbed, so they are suitable as a composite mixture. Making banana stems as an alternative reinforcement for composite materials. Use ecologically safe substances and replace synthetic compounds. The aim of this research is to investigate the tensile strength and flexural strength of banana stem material as a composite fiber alloy in ship component materials in accordance with the review of the Indonesian Classification Bureau (BKI). The method used is experimental testing with a UTM machine according to ASTM D638-03 standards and ASTM D-790 standards. The results of the test experiments show that the tensile strength and flexural strength of banana stems as a composite and natural material are not yet suitable for use as boat component materials under water (hull skin construction), according to BKI's review, but can be used as an alternative composite material for boat component materials above the water line.
Study Of Changes In The Manggar Baru Coastline Using Numerical Methods Danduru, Jeaneth Bintang; Wahab, Muhammad Fajrin; Fauzi, Ardiyanzyah; Sukmara, Riyan Benny; Wirawan, Muhammad Khaisar
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1189

Abstract

Coastline's change was caused by the movement of sediments influenced by waves, wind, and materials around the shore. The movement of sediments around the coast resulted coastal dynamics marked by abrasion and Erosion. In the Balikpapan region, especially on the East Balikpapan Coast near the Makassar Strait, causing high waves on the beaches in this area, one of the areas that was once affected was Manggar Baru Beach, where there was a settlement less than 10 meters from the shoreline. With the changes in the coastline, it could lead to floods, changes in the area, damage to facilities around the coast, and so on. This study is modeled with the help of an application to understand the characteristics of the coastline to get trends in the present and projected future changes for disaster mitigation. It was also found that the average changes in 2024 were 0.829 m/year, in 2027 were 1.984 m/year, in 2032 were 3.982 m/year, and in 2042 were 7.689 m/year. Changes that occurred in Manggar Baru Beach were predominantly experiencing Erosion every year.
Enhancing Community Self-Sufficiency: A Case Study of Motorcycle Maintenance Training in North Balikpapan Suardi, Suardi; Pawara, Muhammad Uswah; Mahmuddin, Faisal; Klara, Syerly
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1121

Abstract

Motorcycle maintenance and service training represents a strategic initiative to enhance technical skills and empower individuals to independently maintain the condition of their vehicles. This training program was implemented in RT 33 Balikpapan with the primary objective of imparting both practical and theoretical knowledge on motorcycle maintenance and repair to local residents. The training methodologies employed encompassed classroom-based theoretical sessions, live demonstrations, and hands-on practical work under the guidance of experienced instructors. The outcomes of this training program indicated a substantial improvement in participants' comprehension and technical proficiency. Prior to the training, most participants possessed minimal knowledge regarding the fundamental aspects of motorcycle maintenance. However, post-training assessments revealed that participants were capable of performing various routine maintenance tasks such as oil changes, brake inspections, and chain adjustments. Furthermore, participants demonstrated the ability to diagnose and repair common issues, including carburetor contamination and ignition system malfunctions. The success of the program was evaluated not only by the enhancement of technical skills but also by the increased confidence and self-reliance of the participants in maintaining their motorcycles. The broader implications of this training include cost savings on vehicle maintenance for residents, improved driving safety, and potential economic uplift through the establishment of independent motorcycle service ventures. In conclusion, the motorcycle maintenance and service training program conducted in RT 33 Balikpapan had a marked positive impact, enhancing the technical capabilities of the community and fostering community empowerment through the development of practical skills.
Comparative Analysis of Installed and Actual Pump Power in Bilge and Ballast Systems: Study Case on 60 m Buoy Laying Vessel Rodlian Jamal Ikhwani; Nurcholik, Samsu Dlukha; Saputra, Muhammad Rizky; Hidayat, Taufik; Syahab, Husein
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1198

Abstract

The piping system of a ship is an essential system that is crucial for the ship's operation. An example of tasks related to the ship's piping system is the design of the system itself. When designing a piping system, certain assumptions are made in calculating the pump power. As a result, the installed pump power is often greater than the actual pump power needed. In this thesis, the actual pump power in the bilge and ballast piping system of a 60 m buoy laying vessel needs to be analyzed. To achieve this, comprehensive and detailed data collection of the piping system is required. Then, the piping system must be drawn in full detail using 3D software to match the actual installation of the piping system. After that, the actual pump power for the piping system can be calculated. The calculated pump power is 5.79 kW, with the pump specifications being an centrifugal pump model with an output of 7.5 kW, chosen due to selecting a pump power approximately 16% lesser than the existing power.
The Influence of Fiberglass Fiber Arrangement Variations on the Tensile and Bending Strength of Ships Muharom, Restu; Alamsyah; Hidayat, Taufik; Syahab , Husein
Indonesian Journal of Maritime Technology Vol. 2 No. 2 (2024): Volume 2 Issue 2, December 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i2.1203

Abstract

The use of Fiberglass Reinforced Plastic (FRP) as a substitute for wood in the shipbuilding industry in Indonesia is increasing, particularly in small vessels under 5 GT. Challenges in obtaining high-quality wood have driven fishermen and the shipbuilding industry to shift towards composite chopped materials such as fiberglass. This research aims to evaluate the tensile and bending strengths of fiberglass composites made using the hand lay-up method with variations of random fiber layers as well as fibers oriented at 0° and 90°. The tests were conducted according to ASTM D638-14 and D790 standards, with the results showing that the chopped-woven-hybrid fiber configuration produced the highest tensile strength of 38.174 MPa, while the chopped-chopped-woven-woven configuration produced the highest bending strength of 104.44 MPa. However, all the tested fiber layer variations did not meet the standards of the Indonesian Classification Bureau (BKI), indicating the need for further optimization in layer arrangement to achieve the desired quality. Additionally, the FRP boat-building training program conducted in Gisik Cemandi Village demonstrated that traditional boat craftsmen can adapt to this new technology, which offers an effective solution to wood scarcity while enhancing the quality and safety of vessels. This research supports the development of FRP as a more reliable, efficient, and environmentally friendly material for shipbuilding, particularly in the fisheries and small shipping sectors in Indonesia. The broader adoption of FRP technology is expected to address environmental and economic challenges in the national shipbuilding industry

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