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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Journal of Mechanical Engineering Science and Technology Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Maritime Park: Journal Of Maritime Technology and Socienty Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Ikhwani, Rodlian Jamal
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Fatigue Analysis of 5000 GT Ferry Ro-Ro’s Car Deck Using Finite Element Method Wulandari, Amalia Ika; Rahmasari, Nindy widia Devi; Adnyani, Luh Putri; ,, Alamsyah; Ikhwani, Rodlian Jamal
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 18, No 3 (2021): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v18i3.39268

Abstract

Ro-Ro Passenger Ship type crossing ship is a ship that is operated to connect 2 (two) ports. On the Ro-Ro ship there is a car deck as one of the vital construction structures, because it is used to support the vehicle load on it. This study aims to determine the value of fatigue life in car deck construction by reviewing hot spot stress areas that are prone to cracking. The value of the fatigue analysis is taken from the greatest stress value and the shortest cycle is taken at each plate thickness variation. The method used is the finite element method (FEM) by varying the thickness of the car deck plate assisted by using finite element based software. The results showed the highest maximum stress was found on car deck 1 with a thickness of 80% (9.6 mm) which was 241.16 Mpa, while the lowest minimum stress was found on car deck 2 with a thickness of 110% (13 mm) which was 103.07 Mpa. The highest value of fatigue life is found in car deck 2 with a plate thickness of 110% (13 mm) of 74.23 years with a stress cycle of 1350000 times, while the lowest fatigue life value is found in car deck 1 with a plate thickness of 80% (9.6 mm) of 7.63 years with a voltage cycle of 220000 times
Effect of Temperature Variations of Corn (Maize) Oil Biodiesel on Torque Values and Thermal Efficiency of Diesel Engines Suardi, Suardi; Ikhwani, Rodlian Jamal; Aulia, Ade Putri Rezki
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 1 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i12023p087

Abstract

The trend of consumption of hydrocarbon fuels in Indonesia, which is increasing every year, is not accompanied by the amount of production, which is decreasing. Alternative fuels to reduce dependence on hydrocarbon fuels. One form of alternative fuel is biodiesel, which is made from corn (maize) oil. Corn oil itself, if processed, can be an option for clean and environmentally friendly energy option and that is the main objective of this research is to determine the performance of biodiesel corn oil on diesel engines. The method used in this study is an experimental method where corn oil biodiesel is tested directly on a testing machine. The data from the test results will be used to find the torque and thermal efficiency values so that the engine performance values for each fuel variation can be identified. The results of the study obtained the engine performance value, namely the highest torque was on diesel oil fuel 4.57 N.m. The highest thermal efficiency value achieved at the B30 fuel sample at a temperature of 60 °C with the thermal efficiency of 17.4 percent. With these results, it can be concluded that engine performance with corn oil fuel can be used as an alternative fuel to replace hydrocarbon fuel.
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.
Design and Implementation of Solar Cells as an Alternative Power Source for Pinisi Ships Suardi, Suardi; Maulana, Mohammad Khafid; Ikhwani, Rodlian Jamal; Pawara, Muhammad Uswah; Mahmuddin, Faisal; Tasrief, Muhdar
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.52111

Abstract

The Pinisi is a traditional Indonesian ship recognized as a maritime cultural masterpiece and remains widely utilized, particularly in liveaboard tourism. The increasing demand for sustainable and innovative energy solutions in the tourism and maritime industries highlights the relevance of adopting solar cells as an alternative energy source for lighting on these ships. Solar cells, primarily made from silicon, efficiently convert solar radiation into electrical energy. This study evaluates the feasibility of using solar cells to power lighting systems on Pinisi ships operating in the Selayar Islands. Solar radiation data from NASA Surface Meteorology was utilized to estimate the optimal power output of solar modules. The analysis indicates that 10 solar cell modules can generate an energy output of 19.480 kWh, sufficient to meet the ship's lighting requirements. Configurations were optimized for different decks, ensuring efficient energy distribution while maintaining sustainability. The findings demonstrate that implementing solar cells on Pinisi ships not only fulfills their energy needs but also supports the maritime tourism industry by providing an eco-friendly and innovative energy solution. This approach contributes to the preservation of maritime heritage while addressing contemporary environmental challenges.Keywords: Pinisi ship, solar cells, energy conversion, maritime tourism innovation
CAD Technology Workshop with the Pierre Bougher Approach in Building Traditional Wooden Ships at Kelompok Usaha Bersama (KUB) Nenang Berlayar North Penajam Paser Hariyono, Hariyono; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian
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.v2i2.1279

Abstract

Program in the form of a CAD Technology Workshop using the Pierre Bouguer approach aims to improve the skills of traditional wooden ship craftsmen in the Kelompok Usaha Bersama (KUB) Nenang Berlayar, Penajam Paser Utara. This activity introduces Computer-Aided Design (CAD) technology as a modern solution to increase the precision, efficiency and quality of wooden ship designs without eliminating traditional values. Pierre Bouguer's approach which focuses on the stability and balance of the ship through drawing lines plans was applied to produce a better design from a technical and safety perspective. Implementation methods include intensive training, technical assistance, and ongoing evaluation, supported by lecturers and students from the Kalimantan Institute of Technology (ITK). The results of the activity showed a significant increase in craftsmen's understanding and ability to use CAD, as seen from the post-test results of participants who achieved an application level above 90%. This program not only helps craftsmen adopt modern technology but also creates a sustainable learning ecosystem through an online-based community. It is hoped that the application of CAD technology can encourage innovation in traditional wooden shipbuilding, increase competitiveness, and provide added economic value for craftsmen amidst the challenges of modernizing the maritime industry.
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%.
The General Arragement of Water Bus on Mahakam River's Alamsyah, Alamsyah; Pawara, Muhammad Uswah; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kumandang, Niti Gede
Maritime Park: Journal of Maritime Technology and Society Volume 4, Issue 3, 2025
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.vi.44430

Abstract

Mahakam River has its own place in the hearts of domestic and foreign tourists. The beauty of the Mahakam river can be enjoyed by using a water bus made of wood. Currently, there are 2 (two) water buses available on the Mahakam river to serve tourists who want to explore its beauty. It was found that the water bus did not meet adequate safety and seaworthiness standards. Referring to the mission of the Tourism Office of the city of Samarinda, namely increasing the development of tourist destinations in the city of Samarinda, the renewal of tourist water buses that are adequate and in accordance with the standards of feasibility and safety is something that is really needed. The purpose of this study is to provide an alternative to the existing water bus design as an effort to rejuvenate the tourism fleet operating on the Mahakam river. The research stages include designing a general arragement for a tourism water bus that produces data in the form of main dimensions, hull form coefficients, lines plan, general arrangement, 3D design, and ship accommodation interiors. The results obtained are the main size of the ship with the following details; L = 14.04 m, B = 5 m, H = 1.4 m, T = 1.1 m, Vs = 10 knots, Engine Power = 87.4 HP (For 2 Engines), Number of Passengers and Crew = 80 Persons. Initial stability was found to meet the criteria.
Co-Authors ,, Alamsyah Alamsyah - Arifuddin, Andi Mursid Nugraha As’ad, Miftachus Surur Aulia, Ade Putri Rezki Faisal Mahmuddin Hariyono Hariyono Kumandang, Niti Gede Kustiwansa, Harlian Luh Putri Adnyani M. Uswah Pawara Manik, Aljoiden Maulana, Mohammad Khafid Rahmasari, Nindy widia Devi Samsu Dlukha N Sitorus, Chris Jeremy Verian Suardi Suardi Tasrief, Muhdar wulandari, amalia ika