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All Journal Indonesian Journal of Engineering and Science (IJES) Maritime Park: Journal Of Maritime Technology and Socienty Journal of Materials Exploration and Findings Prosiding SNTTM
Budiyanto, Muhammad Arif
Department Of Mechanical Engineering, Universitas Indonesia, Kampus Baru UI, Depok, Jawa Barat-16424, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALYSIS OF BENDING MECHANICAL PERFORMANCE OF WELDING JOINTS WITH THE ADDITION OF DIAMOND AND CIRCULAR PLATES Gatot Prayogo; Muhammad Arif Budiyanto; Mustasyar Perkasa
Indonesian Journal of Engineering and Science Vol. 4 No. 1 (2023): Table of Content
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v4i1.94

Abstract

The design and analysis of welded joints are very useful for the safety of steel-based structures. The effect of welded joints meeting at one point on the resulting stress is a critical factor in constructing steel joints. The main objective of this research is to analyze the mechanical performance and microstructure of the welding process on diamond and circular plate joints. The analysis was carried out through experiments and finite element simulations to find out how much influence the addition of a diamond plate and circular plate had on the plate connection. The method used is to analyze the strength, hardness, and micro and macrostructure testing to determine the strength and structural changes of the metal after welding. The results of the test are then used to create an inhomogeneous model of weld joint, then the model is applied to the FEA software to be analyzed by the bending test simulation. The experimentally bending testing was carried out to examine bending performance of the test objects. From the simulation and experimental results, it is found that the shape of a circular plate measuring a diameter of 60 mm with a thickness of 6 mm is appropriate for a flat plate joint, and the flat-diamond plate measuring 60x60 mm with a thickness of 6 mm is proper for application to un-flat (cornered) plate joints. The structural integrity of a flat plate joint with a circular plate is greater than that of a diamond plate.
Monte Carlo-Based Risk Probability Modeling for Ship Incident Muzhoffar, Dimas Angga Fakhri; Tumenggung, Teddy; Riadi, Achmad; Budiyanto, Muhammad Arif; Santoso, Muhammad Agung
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.46416

Abstract

The shipping industry, a critical component of global logistics, faces persistent operational risks that threaten safety, environmental integrity, and economic stability. Traditional risk assessments, often reliant on descriptive statistics, fail to capture the probabilistic and multifaceted nature of maritime accidents. This study bridges this gap by developing a robust Monte Carlo simulation framework to quantify incident probabilities for a tanker fleet. Utilizing a comprehensive dataset from a shipping company, including incident reports, tanker characteristics, and root causes, the model iteratively samples operational and technical variables up to 50,000 iterations to project risk distributions and identify critical failure pathways. The results demonstrate that risk is highly contextual and not an intrinsic tanker property. The analysis reveals that mid-sized tankers (20,000–35,000 GT) are most susceptible to technical failures like propulsion and auxiliary machinery breakdowns, aligning with their high risk for asset loss and security breaches. Conversely, larger tankers (> 60,000 GT) exhibit systematically lower risk across most categories, which is attributed to advanced safety systems and stricter protocols. A notable exception is environmental risk, where smaller tankers (≤ 5000 GT) pose the lowest threat due to their limited spillage potential. The simulation achieved convergence at 10,000 iterations for personnel injury and security breach incidents, and 5000 for asset loss and environmental impacts, providing a validated threshold for reliable prediction. This study concludes that the Monte Carlo method effectively translates historical data into actionable insights, enabling proactive, precisely timed mitigations tailored to specific tanker profiles and incident types. The findings offer a paradigm shift from reactive to predictive risk management in maritime operations.
Design of a 10-Ton Capacity Solar-Powered Cold Storage at the Cituis Fish Auction Site, Tangerang, Banten, Indonesia Wardi, Wardi; Budiyanto, Muhammad Arif
Journal of Materials Exploration and Findings Vol. 4, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study presents the design of a 10-ton capacity solar-powered cold storage system for the Cituis Fish Auction Site (TPI) in Tangerang, Indonesia, as a sustainable solution to support the coastal fisheries sector. The system comprises two temperature zones: an anteroom at 5°C and a freezer room at -30°C, both integrated with a hybrid system utilizing solar panels and batteries. The total power consumption of the cooling system reaches 27.51 kW. The simulation results, obtained using HOMER Pro software, indicate that the hybrid PV system can reduce CO2 emissions by up to 16,754 kg per year. From an economic perspective, the system shows high feasibility with a payback period of only 0.41 years, a capital expenditure (CAPEX) of IDR 745.29 million, and a monthly operational cost (OPEX) of IDR 9.7 million. These findings confirm that the system is both technically and economically viable and can be replicated in other coastal regions.
Analisis multi-kriteria bahan bakar rendah sulfur untuk mesin diesel kapal tanker: Kinerja, emisi, dan biaya Budiyanto, Muhammad Arif; Hanin Safiya; Santoso, Muhammad Agung
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/c7mkyj59

Abstract

Masalah pencemaran lingkungan akibat aktivitas transportasi laut menjadi perhatian utama bagi International Maritime Organization (IMO) dan para pemangku kepentingan. Untuk mengurangi dampak negatif emisi dari kapal terhadap kualitas udara, IMO menetapkan regulasi global melalui MARPOL 73/78. Penelitian ini menggunakan pendekatan komparatif untuk mengevaluasi efektivitas empat jenis bahan bakar berdasarkan kinerja mesin, tingkat emisi, dan aspek biaya. Analisis dilakukan melalui simulasi menggunakan perangkat lunak Diesel-RK serta perhitungan manual pada mesin diesel laut empat langkah tipe C32 ACERT yang umum digunakan pada kapal tanker minyak. Keempat jenis bahan bakar yang diuji, yakni High Sulfur Fuel Oil (HSFO), Low Sulfur Fuel Oil (LSFO), Ultra-Low Sulfur Fuel Oil (ULSFO), dan Biosolar B30, memiliki kadar sulfur yang berbeda namun digunakan pada mesin yang sama. Secara umum, HSFO merupakan bahan bakar dengan harga paling ekonomis dibandingkan ketiga bahan bakar lainnya. Hasil penelitian menunjukkan bahwa Biosolar B30 memberikan performa mesin tertinggi dengan capaian sebesar 88,88%. Dari sisi emisi, ULSFO menunjukkan tingkat emisi NOx dan SO₂ paling rendah, masing-masing dengan persentase rata-rata 39,1% dan 0,02% dibandingkan emisi tertinggi. Sementara itu, untuk emisi CO₂, Biosolar B30 menghasilkan emisi paling rendah dengan rata-rata pengurangan sebesar 90%. Di sisi lain, dari aspek biaya operasional tanpa penggunaan scrubber, Biosolar B30 tercatat sebagai bahan bakar dengan harga tertinggi, yakni sebesar 77% dari total biaya operasional.
Co-Authors Gatot Prayogo Hanin Safiya Mustasyar Perkasa Muzhoffar, Dimas Angga Fakhri Riadi, Achmad Santoso, Muhammad Agung Tumenggung, Teddy Wardi Wardi