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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 8 Documents
 1 
Search results for , issue "Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024" : 8 Documents clear
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.
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.
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.
Tidal Current Pattern Modeling in the Wain River Shipping Channel Waters Huda, Abiyani Choirul; Putri, Destyariani; Nurcholik, Samsu Dlukha; Hasrina
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.v2i1.8481518

Abstract

Semi-enclosed waters surrounded by islands such as Balikpapan Bay, whose waters are influenced by the dynamics of sea tides which affect current speed. Therefore, to understand the pattern and circulation of ocean currents in Balikpapan Bay, especially in the Wain River shipping channel, one way is by hydrodynamic modeling. The water area on the Wain River is an area related to shipping lanes as a shipping route at the Ferry Port. This research on current speed and direction aims to further research on maintaining the depth of shipping lanes due to sedimentation around the Ferry Harbor waters. Therefore, researchers conducted an initial study to create a simulation model of tidal current patterns using Mike 21 software with the aim of finding out what the tidal current patterns and current directions are in the waters of Balikpapan Bay as further data for maintaining the depth of shipping lanes. The data processing used is based on primary data in the form of current speed and direction, and tides and secondary data in the form of depth, current speed and direction, and tides, which are then validated using the RMSE method and to determine the type of tide using the Almilarty method. The results of this research are modeling tidal flow patterns and mapping changes in the morphology of the Wain River. The current speed at high tide ranges from 0.1 m/s to 0.4 m/s, while the current speed at low tide ranges from 0.1 m/s to 0.2 m/s. The depth of the waters around the Wain River is 1 m to 5 m. The tidal type in the waters of the Wain River is a mixed daily double bias.

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