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All Journal International Journal of Science and Engineering (IJSE) KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Department of Naval Architecture E-Dimas: Jurnal Pengabdian kepada Masyarakat International Journal of Marine Engineering Innovation and Research Jurnal Pengabdian Masyarakat Multidisiplin
Ahmad Fauzan Zakki
Departemen Teknik Perkapalan, Fakultas Teknik, Universitas Diponegoro
Aerospace Engineering Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Penjadwalan Proyek Reparasi Kapal Tugboat Selat Legundi II – 206 Dengan Metode Time Cost Trade-Off (TCTO) dan Project Evaluation And Review Technique (PERT) Muhammad Fawwaz Karim Amrullah; Untung Budiarto; Ahmad Fauzan Zakki
Jurnal Teknik Perkapalan Vol 11, No 1 (2023): Januari
Publisher : Diponegoro University

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

Abstract

Tidak dapat dipungkiri proyek perawatan kapal masih sering terjadi keterlambatan seperti pada kapal tugboat Selat Legundi II - 206. Untuk mencegah hal tersebut, perlu dilakukan penerapan percepatan terhadap proyek. Metode yang dapat digunakan untuk melakukan crashing project yaitu Time Cost Trade-Off dan Project Evaluation and Review Technique. Penyelesaian metode ini dapat digunakan dengan menambahkan alternatif tertentu. Alternatif yang digunakan pada penelitian ini yaitu penambahan jam kerja dan tenaga kerja, diterapkan pada reparasi bagian hull kapal tugboat Selat Legundi II - 206. Penelitian ini bertujuan untuk mengetahui percepatan durasi dapat dilakukan dengan penambahan biaya optimum terhadap percepatan tersebut. Dari percepatan tersebut, dapat diketahui probabilitas keberhasilan terhadap percepatan yang dilakukan. Berdasarkan hasil analisa, pekerjaan yang terdapat pada lintasan kritis di bagian Hull menghasilkan percepatan waktu lebih efisien sebesar 16% yaitu 4 hari dari durasi normal yang semula 24 hari menjadi 20 hari. Percepatan yang telah dilakukan menghasilkan penambahan biaya sebesar 0,41% yaitu Rp 900.000 dari total biaya pada durasi normal sebesar Rp 213.450.000 menjadi Rp 214.350.000 pada biaya total. Berdasarkan percepatan yang telah dilakukan, diterapkan metode Project Evaluation and Review Technique dan keberhasilan proyek ini dapat diselesaikan dalam waktu 20 hari sebesar 87,90%.
Study and Analysis of the Performance of the Propulsion System of the K-61 Type Amphibious Vehicle for Artillery Transport (KAPA) Good Rindo; Ahmad Fauzan Zakki; Farell Elghifari Putratama; Berlian Arswendo Adietya; Sapto Wiratno Satoto
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 1 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.4732

Abstract

The application of waterjet propulsion systems in amphibious combat vehicles, such as the KAPA Type K-61 used by the Indonesian National Armed Forces (TNI) for transporting artillery munitions, is crucial for enhancing operational performance. The working principle of a waterjet involves drawing water from beneath the vehicle's hull, accelerating it through a pump, and expelling it to generate thrust. The design of the waterjet propulsion system significantly impacts the thrust produced. This study aims to evaluate the maximum performance achievable by the waterjet propulsion system of the KAPA Type K-61. The analysis is conducted using various Index Velocity Ratio (IVR) values, including IVR 0.28, which represents the current speed of the KAPA Type K-61, and other variations such as IVR 0.54, 0.59, 0.67, 0.70, 0.78, 0.94, 1.18, 1.64, and 2.38. The analysis results include the thrust value produced at the waterjet outlet, efficiency, and propulsion power. The study found that at an IVR of 2.38, the system produced the highest thrust of 30.72 N, with a propulsion power of 7315.13 Watts, equivalent to 9.95 Horsepower, and the highest efficiency of 99.21%. Based on the research conducted, it is recommended that future studies create a geometric model of the KAPA Type K-61 with original and more detailed dimensions and perform a 1:1 scale analysis to strengthen the obtained results. Additionally, analyzing the waterjet propulsion system along with the impeller or propeller system is also suggested to gain a more comprehensive understanding of the overall propulsion system's performance and efficiency.
The Feasibility Study of Rectangular Floating Solar Panel Motion in Semangka Bay Waters Berlian Arswendo Adietya; Yudy Gunawan; Ahmad Fauzan Zakki; Ocid Mursid; Tuswan
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 1 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.4738

Abstract

With the depletion of mineral resources in Indonesia, the need for effective renewable energy alternatives has become critical. Solar energy, harnessed through photovoltaic panels, presents significant potential. However, the widespread adoption of solar panels remains limited due to their large land area requirements and susceptibility to damage. Floating solar panels, installed on water surfaces, offer a promising solution by enhancing energy efficiency through natural cooling while addressing land constraints. This study aims to analyze the motion dynamics of floating solar panels in Semangka Bay and identify the most effective design for open water conditions. Three models were tested: rectangular, kite-shaped, and perforated, using 3D simulation software. The analysis focused on the Response Amplitude Operator (RAO) under regular wave conditions at a 180° angle. The results revealed that Model 3, with 8 mooring points, exhibited the best performance in mitigating rolling, pitching, and heaving motions. The maximum rolling value reached 826.24 cm at 81 seconds, with a minimum of -735.36 cm at 86.7 seconds. Pitching peaked at 390.30 cm at 61.4 seconds and fell to -376.42 cm at 63.9 seconds. Heaving values ranged from a maximum of 17.64 cm at 62.8 seconds to a minimum of -220.94 cm at 83 seconds. This study concludes that Model 3 with 8 moorings offers superior stability, making it the optimal design for floating solar panels in open waters like Semangka Bay. By addressing environmental and implementation challenges, this research contributes significantly to advancing floating solar energy technology in Indonesia. The findings highlight the potential of efficient and resilient designs to harness Indonesia’s abundant solar energy resources effectively.
Analysis of the Structural Response of a 2919 GT Ro-Ro Ship Due to Changes in Hull Construction Length Imam Pujo Mulyatno; Ahmad Fauzan Zakki; Kukuh Prakoso Wicaksono; Berlian Arswendo Adietya; Tuswan Adietya
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4837

Abstract

On the 2919 GT Ro-Ro vessel, structural geometry changes, specifically in the Length Between Perpendiculars (LPP) with additional framing, lead to variations in loading and maximum stress, in accordance with Biro Klasifikasi Indonesia (BKI) regulations in Volume II. Finite Element Method analysis reveals structural responses, particularly in the parallel middle body section. Initially, the vessel was 10.5 meters long to support loads of seven 20-foot trucks; modifications increased this to 13.5 meters for loads of seven 40-foot trucks and 18 meters for a combination of 20-foot and 40-foot truck loads. The analysis results indicate significant differences in the vessel’s maximum structural stress under truck-loaded conditions. For lengths of 10.5 meters, 13.5 meters, and 18 meters, the stresses remain within safe limits under all conditions (Calm Water, Sagging, and Hogging), with (sigma)ult lower than the allowable as set by BKI. However, the 18-meter length exhibits maximum stress approaching the safe threshold in the Hogging condition, with (sigma)ult = reaching 243.4 MPa, suggesting structural modifications are required to ensure vessel safety.
Strength Analysis of Towing Hook Support Structure on TB. Khatulistiwa 01 Philipus Valentino; Hartono Yudo; Ahmad Fauzan Zakki
International Journal of Marine Engineering Innovation and Research Vol. 7 No. 4 (2022)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i4.5560

Abstract

Towing hook is one of the important components of a tugboat. Its function is to tow various types of ships, namely containers, tanker ships, and even barges. This activity affects the components to undergo failure and crack, especially the support structure of the hook. Earlier research has analyzed various types of stress characteristics, namely fatigue crack, maximum stress, and maximum factor of safety aimed both at the support structure and the whole profile of the tug. The research aim is to determine the value of stress in the support structure and the safety factor brought by tensile load transferred from the towing hook. The analysis is done using finite element method in Altair Hyper Works 2019. Structural strength of the towing hook support structure is analyzed in 2 loading conditions, namely lightweight barge and full load barge. Two different approaches are used for comparison. The first approach is using barge resistance, and the second is by utilizing maximum tug horse-power to speed ratio. Maximum stress acquired in both loading conditions and both approaches is 118.64 MPa; 121.80 MPa; 230.90 MPa; 329.86 MPa respectively. The safety factor is measured using 2 criteria, BKI permissible stress criterion and BKI Material Strength criterion. Results of safety factors based on BKI permissible stress are 1.644; 1.601; 0.845; and 0.591. According to BKI Material Strength, the safety factors on both loading conditions are 3.371; 3.284; 1.732; and 1.212.
Co-Authors Ahmad Firdaus Akbar Ramadhan Akhmad Syarif Zulfikar Alexander Mario Ticris Nainggolan Alif Fadhilah Aloisius Truntum Dewangkoro Alvin Nadiyas Juneva Ananda Riris Kurnia Pratama Andi Trimulyono Angga Pradipta Ardhani Bintang Novian Arfan Abdul Ghofur Arga Gideon Sarwanto Argyantara Gigih Pradana Ari Wibawa Budi Santosa Ari Wibawa Budi Santosa Arif Wahyudin Astra H Napitupulu Atiek Suprapti Aulia Windyandari Bayu Ade Mahaputra Berlian Arswendo Berlian Arswendo Adietya Berlian Arswendo Adietya Berlian Arswendo Adietya Bukhari Kusuma Alam Buyung Vidiarto Dan Fianca Daniel Sahala Putra Panggabean Deddy Chrismianto Dimas Maulana Agung Pambudi Egar Haneshananta Sihombing Egar Haneshananta Sihombing Eko Sasmito Hadi Eli Akim Sipayung Eni Hanifah Enky Pratama Agustian F Fitriningsi Fadli Nuriman Faiq Fachri Assaify Farell Elghifari Putratama Farhan Abdul Karim Frima Daim Siregar Galang Choirun Amal Giri Aditya Chandra J Good Rindo Good Rindo Good Rindo Gunawan Gunawan Hafizh Adin Pujanto Harry Immanuel Pangaribuan Hartono Yudho Hartono Yudo Hartono Yudo Hartono Yudo Hristo Anggigi Ihsan Aldi Prasetyo Imam Nur Hidayat Imam Pujo Mulyanto Imam Pujo Mulyatno Imam Pujo Mulyatno Iqbal Habib Isyroqi Al Ghifari Joevero Risqy Suvica Kiryanto Kiryanto Kiryanto Kiryanto Kukuh Prakoso Wicaksono Kurniawan Agung Santosa Ladwika Ilham Albiyan Melati Darmastuti Mohammad Budi Hermawan Muhamad Rizki Riyadi Muhamad Yamin Soamole Muhammad Akbar Ferbian Muhammad Azizul Hakim Muhammad Dikwan Muhammad Fahmy Fakhrija Muhammad Fawwaz Karim Amrullah Muhammad Ichwan Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Ridho Musthofainal Akhyar Nanang Zarma Nanda Aden Noprian Christy S Ocid Mursid Odio Setyawan Parlindungan Manik Parlindungan Manik Parlindungan Manik Philipus Valentino Rachmat Hidayat Raendi Meivando Gea Rais Rachman Hakim Raldimaz Islahan Rani Komala Sari Regita Berlian Agustian Ridwan Muhammad Rilo Wahyu Pambudi Rizki Aziz Radyantama Rizki Fadillah Sahat Parulian Sagala Samuel Samuel Sapto Wiratno Satoto Sarjito Joko Sisworo Sarjito Jokosisworo Septyawan Bintar Saputra Seto Yuwantoro Slamet Haryo Samudro Solichin Djazuli Said Solihin Suwarsa Sukanto Jatmiko Sukron Makmun Sukron Makmun Taufiq Hidayah Tuswan Tuswan Adietya Untung Budiarto Wilma Amiruddin Wisesa Maheswara Yudhistira Dwi Putra Yudy Gunawan Zaenal Arifin