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PENGEMBANGAN FOIL NACA SERI 2412 SEBAGAI SISTEM PENYELAMAN MODEL KAPAL SELAM Munazid, Ali; Suwasono, Bagiyo
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 12, No 2 (2015): Juni
Publisher : Department of Naval Architecture - Diponegoro University

BentukÂ foil menghasilkan gaya angkat (lift force) ketika foil dilewati oleh aliran fluidaÂ karena adanya pengaruh interaksi antara aliran fluida dengan permukaan foil yang mengakibatkan tekanan permukaan atas lebih kecil dari permukaan bawah. Bagaimana mengaplikasikan teori foil pada hydroplane kapal selam sebagai Â system penyelaman, dengan membalik foil maka lift force tersebut menjadi gaya ke bawah, dengan demikian memungkinkan kapal selam dapat menyelam, melayang dan bermanouver di bawah air, seperti halnya gerak pesawat terbang yang terbang dan melayang dengan menggunakan sayap. Dilakukan penelitian dan pengamatan terhadap kemampuan penyelaman (diving plan) dari foil NACA seri 2412 pada model kapal selam, dengan mencari nilai Cl (coefisien lift) di Laboratorium, serta mendesain bentuk badan kapal selam dan analisa gaya-gaya yang bekerja pada model kapal selam, jumlah gaya-gaya yang bekerja keatas lebih rendah dari gaya-gaya ke bawah maka kapal selam mampu menyelam. Penerapan Hydroplane sebagai diving plane dapat diterapkan, kemampuan penyelaman dipengaruhi oleh sudut flipÂ Hydroplane dan kecepatan model, semakin besar kecepatan dan sudut flip maka semakin besar kedalaman penyelaman yang dapat dilakukan.

PRA-PERANCANGAN ALAT MATERIAL TRANSPORTER UNTUK PROSES PENGGANTIAN PELAT KAPAL DI AREA DOK Muhammad Syawal; Bagiyo Suwasono; Ali Munazid
JURNAL JALASENA Vol 4 No 1 (2022): AGUSTUS 2022
Publisher : Fakultas Sains dan Teknologi Universitas Karimun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51742/jalasena.v4i1.622

The equipment used for transporter materials is an important part of a shipyard. This is a necessity of the shipyard, especiallythe medium-sized shipyard, which serves to move materials from the warehouse to the field at the production process stage.This manual ship bottom replating activity requires quite a lot of time and workers in the process, so the results obtained areless efficient and uneconomical. In the process of repairing a ship to replating a plate, an obstacle was found, namely therepair of material in the position of the plate at the bottom was very difficult. Basically, the transfer of a material is carriedout by a crane with a certain capacity and conventional methods of using pipes as a means of moving it. Looking at thedevelopment of technology in modern times, it can all be said that technology is already robot-based. Therefore, the design ofa transporter material tool was carried out that could support the work of replating the plates at the bottom of the ship. Theresults obtained from the evaluation of the suitability of the equipment and the application of an information system in the useof transporter materials are information about the list of lifting equipment needed based on the weight of the construction andthe parts to be replating, especially at the bottom. From this modeling, quite efficient results were obtained with softwaresimulations with standard results of 1: 3 from data in the field. It is hoped that the manufacture of the tool model can facilitatethe work of replating the plates on the bottom of the ship.

Teknis Perancangan Restoran Terapung Sebagai Penunjang Pariwisata di Coastal Area Pulau Karimun Admarch Gery Haryoseno; Bagiyo Suwasono; Ali Munazid; Didik Hardianto
Poltanesa Vol 23 No 2 (2022): Desember 2022
Publisher : P2M Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v23i2.1836

Potensi wisata yang berada di pulau karimun memiliki beberapa destinasi objek wisata yaitu wisata pantai, air terjun, kolam renang, pendakian gunung jantan dan yang terbaru adalah reklamasi daratan yang dikenal dengan Coastal Area. Restoran Terapung adalah sebuah rumah makan yang berdiri di atas permukaan air yang menyajikan dan mengolah makanan hasil potensi laut. Tujuan dari penelitian ini adalah untuk mendapatkan ukuran utama kapal (Principal Dimension), membuat bentuk dari rencana garis kapal (Lines Plan) yang sesuai dengan perairan Pulau Karimun, Kepulauan Riau dan pembuatan rencana umum (General Arrangement) kapal berdasarkan ukuran utama dan fungsi dari kapal sebagai sebuah restoran terapung. Penelitian ini dilakukan menggunakan data sekunder yang digunakan adalah data pembanding. Hasil dari penelitian ini adalah Ukuran utama yang di dapatkan dari hasil metode kapal pembanding didapatkan dengan rata – rata dan di lanjutkan dengan menghasilkan Gross Tonnage: 1409 m, Length Overall Area (Hull) :74,57 m, Length WL :72,26 m, Length BP: 70,84 m, Breadth Moulded: 16,44 m, Depth Moulded :4,15 m, Design Draft :3,11 m, Dead Weight Tonnage: 2,165 ton.

Studi Motion Sickness Incidence (Msi) Pada Kapal Patroli (Kal-28) Katamaran Muhammad Thareq Maulana; Bagyo Suwasono; Didik Harianto; Sutiyo Sutiyo; Ali Munazid
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 5, Number 2, July 2024 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v5i2.32945

On a Ship seasickness (motion sickness) is a condition caused by the movement of a ship that results in dizziness, nausea, and vomiting. The Motion Sickness Incidence (MSI) Study on the Patrol Catamaran (KAL-28) aims to evaluate the comfort level of passengers and the safety of the ship's crew during operations, following the ISO 2631/1997 standards. The evaluation is conducted on the vertical acceleration response of the ship under various wave conditions, speeds, and wave directions. Mapping is performed in various areas of the ship, including the deck, navigation room, and engine room, considering wave heights of 0.875 meters and 2 meters at speeds of 15 knots, 22.5 knots, and 30 knots. The research results indicate that at a speed of 15 knots, the deck area, navigation room, and engine room meet the criteria from comfortable to somewhat uncomfortable. However, at speeds of 22.5 knots and 30 knots, these areas are rated as somewhat uncomfortable to very uncomfortable. This study emphasizes the need for ship design that considers both passenger comfort and safety, especially for patrol catamarans.

Uji Seakeeping Model Kapal Displacement pada Area Terbuka Andreas, Mario; Poundra, G.A.P.; Munazid , Ali; Hardianto, Didik; Suwasono, Bagiyo
JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Vol 5 No 2 (2023): Volume: 5 | Nomor: 2 | Oktober 2023
Publisher : Pusat Penelitian, Pengembangan, dan Pemberdayaan Masyarakat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v5i2.121

Ship Movement is an important factor in shipbuilding. In determining the ship's maneuverability, there are many aspects that must be considered in the design, namely resistance and angle of attack of the waves. In determining the angle of attack of the waves, the test uses the trigonometry principle to determine the angle of attack of the waves. Where the results of the 3 maneuvers of the Heave, Roll and Pitch ships at speeds of 0 knots, 0.389 knots, 0.778 knots, 1.166 knots, 1943 knots, it is known that the displacement model ship can be used in an open area with a set scale.

Flettner Rotor Implication on Ship Ferry The Kalianget-Kagean Route Using Computational Fluid Dynamics Firdausyah, Akmal; Munazid, Ali; Pambudi, Prastyono Eko; Suwasono, Bagiyo
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.33-40

Ship's Ferries are a sea crossing that continues to operate around the time. The consequence related to shipping activities is an increase in ship exhaust emissions. One alternative for ship propulsion that is environmentally friendly is the Flettner rotor. The working principle of the tool follows the theory of the Magnus effect, where the force arises due to the difference in pressure between the two sides of the Flettner rotor. This study implicates the Flettner rotor on the Kalianget-Kangean ferry route with variations in wind speeds of 10, 15 and 20 knots and variations in dimensions of 3x1, 5x1 and 7x1 meters with a rotational speed of 500 rpm. Optimal results through computational fluid dynamics (CFD) simulations show a coefficient of lift (CL) of 3.647 and a lift force (Fl) of 2,980,631.2 kilonewton with dimensions of 5x1 meters and a wind speed of 15 knots. While the implicit percentage of Flettner rotors in KMP. DBS I of 18.11%, KMP. DBS III of 11.27%, and KMP. NS 92 of 5.45%.

Studi Penambahan Centerbulb Bentuk Foil terhadap Besarnya Hambatan pada Kapal Katamaran Tipe NPL 4A Ikhsan, Satria Nur; Munazid, Ali; Sutiyo, Sutiyo; Suwasono, Bagiyo
Jurnal Penelitian Enjiniring Vol 28 No 1 (2024)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.052024.03

Salah satu hal penting dalam sebuah kapal adalah hambatan. Semakin rendah nilai hambatan pada kapal maka semakin baik kapal berlayar dengan effisien. Untuk mengurangi hambatan kapal beberapa penelitian sebelumnya menggunakan konsep centerbulb. Pada penelitian ini bertujuan untuk mengetahui pengaruh penambahan centerbulb bentuk Foil terhadap besarnya hambatan kapal katamaran tipe NPL 4a. Penelitian ini fokus pada pengaruh besarnya rasio dimensi centerbulb terhadap lambung kapal katamaran tipe NPL 4a yang menggunakan metode penelitian yaitu memodelkan 1 model lambung katamaran NPL 4a dengan S/L 0,2 dan Kapal katamaran yang di uji memiliki demi-hull yang simetris dengan beberapa variasi kecepatan yaitu Fr = 0,19 – 0,37. Bentuk centerbulb yang dipakai ialah Foil NACA 0030 dengan memodelkan 3 variasi besar rasio bentuk terhadap lambung kapal yaitu 10% - 30% dengan peletakkan pada 1/3 Lpp. Hasil penelitian dari keempat model kapal, model 1 tetap memiliki nilai hambatan yang rendah pada kecepatan Fr 0,19 – 0,37 daripada ketiga model lainnya (model 2-model 4). Namun model 2 memiliki potensi yang lebih baik dalam menurunkan hambatan daripada model 3 – model 4 apabila menambahkan variasi posisi centerbulb seperti pada penelitian sebelumnya.

Study Of Lavatory Installation Methods On Ship Landing Platforms Musa, Musa; Munazid , Ali; Suwasono , Bagiyo; Hardianto, Didik; Sutiyo, Sutiyo
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 2, July 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.45475

Landing Platform Dock (LPD) ships as amphibious warships with complex accommodation systems, including lavatory installations, require effective and efficient installation methods. This study was motivated by the need to compare two lavatory installation methods, namely the conventional method and the modular method, in an effort to increase productivity and reduce the amount of rework in the construction of LPD ships. The research method used is the direct observation method at the national shipyard, with data collection through installation time records, number of man hours, material costs, and number of rework events. Data were analyzed using a quantitative descriptive approach by comparing these variables in each type of lavatory. In this study, 3 types of lavatory with different dimensions and shapes were used. The modular method which requires 10-14 days to complete has proven to be significantly more efficient in terms of implementation time compared to the conventional method with results of 19-25 days according to the type of lavatory. Likewise in the number of man-hours needed, which reached 384-480 JO for the conventional method and 264-456 JO for the modular method in the three types of work. The costs incurred for this production require IDR 67,880,890 - IDR 81,377,090 for the modular method and IDR 71,682,490 - IDR 87,713,090 for the conventional method. Thus, the modular method has proven to be more effective in increasing productivity and reducing the cost of installing a better lavatory.

STUDY OF FAST PATROL BOAT MODELS WITH AND WITHOUT TUNNELS ON THE EFFECT OF RESISTANCE USING COMPUTATIONAL FLUID DYNAMICS S, Sutiyo; Munazid, Ali; Poundra, Gde A. Prabhawatya; Suwasono, Bagiyo
Journal of Marine-Earth Science and Technology Vol. 4 No. 1 (2023): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v4i1.586

Indonesia as an archipelago countries demand modern boats for marine security, resulting in a surge in the development of past patrol vessels. The investigation in this study focused on designs with and without a tunnel at the bottom to determine which design provided the least resistance. CFD offer realistic findings for comparing the problems encountered by two distinct kinds of fast patrol boats. The computation the use of no tunnel, the use of a tunnel on fast patrol boat reduced resistance by an average of 5.4%. According to the results of the CFD simulations, using a tunnel may greatly reduce the high pressure at the bottom in interactions with the flow of water. The utilization of using tunnel is a solution that may be employed more successfully for fast patrol boat operation

Teknis Perancangan Restoran Terapung Sebagai Penunjang Pariwisata di Coastal Area Pulau Karimun Haryoseno, Admarch Gery; Suwasono, Bagiyo; Munazid, Ali; Hardianto, Didik
Poltanesa Vol 23 No 2 (2022): Desember 2022
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v23i2.1836

Potensi wisata yang berada di pulau karimun memiliki beberapa destinasi objek wisata yaitu wisata pantai, air terjun, kolam renang, pendakian gunung jantan dan yang terbaru adalah reklamasi daratan yang dikenal dengan Coastal Area. Restoran Terapung adalah sebuah rumah makan yang berdiri di atas permukaan air yang menyajikan dan mengolah makanan hasil potensi laut. Tujuan dari penelitian ini adalah untuk mendapatkan ukuran utama kapal (Principal Dimension), membuat bentuk dari rencana garis kapal (Lines Plan) yang sesuai dengan perairan Pulau Karimun, Kepulauan Riau dan pembuatan rencana umum (General Arrangement) kapal berdasarkan ukuran utama dan fungsi dari kapal sebagai sebuah restoran terapung. Penelitian ini dilakukan menggunakan data sekunder yang digunakan adalah data pembanding. Hasil dari penelitian ini adalah Ukuran utama yang di dapatkan dari hasil metode kapal pembanding didapatkan dengan rata – rata dan di lanjutkan dengan menghasilkan Gross Tonnage: 1409 m, Length Overall Area (Hull) :74,57 m, Length WL :72,26 m, Length BP: 70,84 m, Breadth Moulded: 16,44 m, Depth Moulded :4,15 m, Design Draft :3,11 m, Dead Weight Tonnage: 2,165 ton.

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