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All Journal TEKNIK JST ( Jurnal Sains Terapan ) JTT (Jurnal Teknologi Terpadu) INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Turbo : Jurnal Program Studi Teknik Mesin INOVTEK POLBENG IJOCE (International Journal of Offshore and Coastal Engineering) Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Wave: Jurnal Ilmiah Teknologi Maritim JURNAL SAINTIS Specta Journal of Technology International Journal of Marine Engineering Innovation and Research Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Techno Bahari JMES: The International Journal of Mechanical Engineering and Sciences Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) Collaborate Daily Book Series Media Elektrik WAVE: Jurnal Ilmiah Teknologi Maritim
Alamsyah
Institut Teknologi Kalimantan
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Analisis Stabilitas KM. Rejeki Baru Kharisma Rute Tarakan – Tanjung Selor Alamsyah Alamsyah; Zen Zulkarnaen; Suardi Suardi
TEKNIK Vol 42, No 1 (2021)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i1.31283

Abstract

Ship stability that is not according to the IMO standard will make the ship capsize when operating. The purpose of this research is to determine the cause of the overturn in terms of the stability criteria of the ship. The method used is software  of simulation. Stability analysis is carried out with the load case that occurs in the field when an accident occurs and the ideal loadcase according to PM 104 2017 standards about’s the transportation of operation. The results showed is cargo of goods placed on the roof top (loadcase 1) based on the criteria of Intact Stability; area of the stability arm curve at heeling 0° ~ 30° = 0.9417 m.deg, area 0° ~ 40° = 1,0200 m.deg, 30° ~ 40° = 0.0783 m.deg, GZ value at heeling 30° = 0.029 m, angle of occurrence of maximum GZ = 21.8°, and the initial GMt value = 0.135 m, the results stated that all did not meet the Intact Stability code A.749 criteria, while in it was obtained cargo of goods placed in the hull (loadcase 2) based on Intact Stability; area of the stability arm curve at heeling 0° ~ 30° = 4.5338 m.deg, area 0° ~ 40° = 7.1643 m.deg, area 30° ~ 40° = 2.6305 m.deg, GZ value at heeling 30° = 0.265 m, angle of occurrence of maximum GZ = 34.5°, and the initial GMt value = 0.621 m, the results stated that all met the Intact Stability code A.749 criteria
Conceptual and Preliminary Design Innovation of a Multipurpose Palm Fruit Vessel for Inland Plantation Waterways in Muara Kaman Suardi Suardi; Jamal Jamal; Arwis Irmandana; Alamsyah Alamsyah; Wira Setiawan; Chris Jeremy Verian Sitorus; Jusma Wahidah; Cindy Lionita Agusty; Faisal Mahmuddin
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8481848

Abstract

Oil palm fruit production in East Kalimantan continues to increase in line with high market demand. This situation demands efficient transportation facilities to transport the harvest from plantation areas. Furthermore, annual forest fires, particularly in peatland areas, are often difficult to manage due to limited land access. Based on these two challenges, this study proposes the design of a multipurpose vessel capable of both transporting oil palm fruit and supporting firefighting. The vessel is designed with main dimensions of L = 20 m, B = 4.9 m, H = 2 m, T = 1.5 m, and an operating speed of 8 knots. The cargo hold has a carrying capacity of 67.3 tons with a single trip distance of 12.3 km. The main innovation developed is a conveyor belt with hydraulic arms to increase the efficiency of the oil palm fruit loading and unloading process in the plantation area. Furthermore, the vessel is equipped with an external firefighting system with a capacity of 90 m³/hour with a horizontal spray range of 30 meters and a vertical height of 20 meters. The fire monitor operates using 7 kW of power to generate sufficient pressure to extinguish fires in areas difficult to reach from the riverbank. This multipurpose vessel is designed to provide an integrated solution for the oil palm plantation logistics chain while improving the response to forest fires in the Muara Kaman District.
Structural Response and Optimization of a Tugboat Midship Section Under Varied Transverse Frame Spacing Using Finite Element Analysis Amalia Ika Wulandari; Alamsyah Alamsyah; Hariyono; Ryan Raruk; Husein Syahab; Muhammad Anjas Syam; Suardi Suardi; Dimas Fajar Prasetyo
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8482002

Abstract

Transverse framing systems serve as a critical structural backbone for marine vessels, governing localized stiffness and cross-sectional hull strength. This study investigates the structural response of a tugboat’s midship section under various transverse frame spacing configurations using the Finite Element Method (FEM) to optimize lightweight tonnage (LWT) while maintaining seaworthiness. Utilizing structural data from a under-30-meter service tugboat, five distinct frame spacing variations 500 mm (baseline actual design), 550 mm, 575 mm, 600 mm, and 625 mm were modeled using four-node shell elements (SHELL181) within ANSYS software. A constant uniform static deck pressure load of 0.0122 MPa was applied to evaluate localized stress distributions and elastic displacement fields under rigid boundary conditions. Numerical simulations reveal a progressive, linear increase in both equivalent stresses and vertical deflections as the unsupported span of the deck plating expands. The maximum von Mises equivalent stress escalated from 31.4237 MPa at the 500 mm baseline configuration to 34.1552 MPa (550 mm), 35.4687 MPa (575 mm), 36.8590 MPa (600 mm), and peaked at 40.6607 MPa under the widest 625 mm spacing. Concurrently, the total displacement vector sum rose from 0.56047 mm at the baseline to a peak of 0.86030 mm at 625 mm spacing due to the reduction of localized flexural rigidity. Crucially, despite the elevated structural responses, all configurations safely satisfy the strict structural limits enforced by the Indonesian Classification Bureau (BKI 2022) rules, as the maximum peak stress (40.6607 MPa) remains substantially below the nominal upper yield strength of ordinary hull structural steel (ReH = 235 N/mm2). These findings demonstrate that extending the transverse frame spacing up to 625 mm is structurally viable, offering a verified mechanism for weight optimization without compromising structural safety margins.
Reliability and Risk Analysis of Lubrication System on Sabuk Nusantara 43 Suardi Suardi; Wira Setiawan; Alamsyah Alamsyah; Amalia Ika Wulandari; Taufik Hidayat
International Journal of Offshore and Coastal Engineering Vol. 7 No. 2 (2023)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i2.2363

Abstract

This study aims to present a systematic approach to evaluating the reliability of the lubrication system on the Sabuk Nusantara 43. The methods used in conducting risk assessments are quantitative methods and qualitative methods or semi-quantitative methods. In the quantitative method, the approach taken is more to the value (number) approach. Meanwhile, in the semi-quantitative method, the approach used is a qualitative approach and a quantitative approach. This method can identify potential events that not only cause disruption to pipeline operations but also events related to safety and the environment. The results showed that the biggest risk in the installation of Sabuk Nusantara 43 lubricant was found in the filter section with damage levels reaching five times in one year with risk matrix plotting in the major category (Not Acceptable) and risk control options (recommendation). Selection of filter components that are better and fulfill standards of existing rules, regular maintenance and checking, and avoiding the use of lubricating oil that is too old and used.
Co-Authors Abrari Noor Hasmi Ade Ray Siahaan Adhy Rahmat Agus Budianto Aknul Ciptiandi Alan Dicky Swans Saragih Amalia Ika Wulandari Amalia Ika Wulandari Amalia Ika Wulandari Andi Mursid Nugraha Arifuddin Andi Mursyid Nugraha Arifuddin Anggoronadhi Dianiswara Ardhi Hidayatullah Ardhi Hidayatullah Arif Nur Iskandar Arwis Irmandana Asram Dio Pratama Bebeto Fandi Birana Bimo Harseno Ramadhan Chris Jeremy Verian Sitorus Christian Hendra Gonawan Cindy Lionita Agusty Cindy Lionita Agusty Cindy Lionita Agusty Daeng Paroka Daeng Paroka Destyariani Liana Putri Dimas Fajar Prasetyo Elyazha D. C. Faisal Mahmuddin Faisal Mahmuddin Faisal Mahmuddin Fernanda Wahyu Pratama Feston Sandi Paribang Habibi Habibi Habibi Habibi Habibi Habibi Handika Sanjaya Sitanggang Handika Sanjaya Sitanggang Harifuddin Harifuddin Hariyono Hariyono Hariyono Hariyono Harlian Kustiwansa Husein Syahab Husein Syahab Irfan Fadillah Irham Bahri Irvan Setiawan Ivan Fadilah Jamal Jamal Jusma Wahidah M. Rusydi Alwi M. Uswah Pawara Mangapoi E.H.A. Purba Merlistyo Driantama Arwan Muh. Reza Fachrul Jaya Muh. Reza Fachrul Jaya Muhammad Anjas Syam Muhammad Anjas Syam Muhammad Dipo Nugroho Muhammad Fikri Fadlurrahman Muhammad Nuzhand Muhammad Syarif Muhammad Yusuf Al-Hafidz Nurbaya Nurbaya Nurbaya Raditya, Muhammad Yogi Rifai, Muhammad Rizky Risaldo Rodlian Jamal Ikhwani Ryan Raruk Ryo Herlambang Samsu Dlukha N Samsu Dlukha Nurcholik Septiany Tri Pangestu Setiawan, Wira Sherly Clara Suardi Huda Suardi Suardi Suardi Suardi Taufik Hidayat Wahyu Dhono Saputra Wardina Suwedy Widya Yulia Astin Wira Setiawan Wira Setiawan Wira Setiawan Wira Setiawan Zen Zulkarnaen