JURNAL JALASENA https://ejurnal.universitaskarimun.ac.id/index.php/jalasena <p style="text-align: justify;">Kata<strong> JALASENA</strong> diinspirasi dari Bahasa Sansekerta yaitu kata Jala berarti air laut; Sena berarti penguasa. Jurnal <strong>JALASENA</strong> ini dimaknai sebagai upaya menjadikan teknik perkapalan sebagai program studi yang merajai publikasi penelitian di bidang Teknik Perkapalan di wilayah Barat Indonesia. Jurnal <strong>JALASENA</strong> melingkupi penelitian di bidang desain, konstruksi, sistem (permesinan), hidrodinamika, material kelautan, dan manajemen galangan kapal. Dengan adanya penelitian yang dipublikasikan di jurnal ini berarti turut serta membantu Pendidikan di bidang Teknik perkapalan dan memperkaya khasanah ilmu pengetahuan di bidang Teknik Perkapalan.</p> <p><img src="/public/site/images/zakwan/COVER_Jalasena_fix_copy.png"></p> Fakultas Sains dan Teknologi Universitas Karimun en-US JURNAL JALASENA 2686-6544 ANALISA KEKUATAN KONSTRUKSI RAMP DOOR PADA DECK CARGO BARGE DENGAN METODE ELEMEN HINGGA (FINITE ELEMENT METHOD) https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/558 <p><em>Ramp door is a</em> <em>construction on a ship that serves to access the entry and exit of vehicles or cargo to be transported by a ship. To ensure that the ramp door can accept the load from these vehicles, a strength analysis of the ramp door construction will be carried out using FEM-based structural static analysis software. From the results of software testing, the maximum stres</em><em>s</em><em> value occurs on the ramp door model 2 of 166.08 MPa and the minimum stress/stress value occurs on the ramp door model 3 of 117.36 MPa. The safety factor values of the three ramp door models analyzed meet the requirements according to the rules of the Indonesian Classification Bureau, namely the safety factor value for the ramp door model 1 is 2.02, the ramp door model 2 is 1.50 and the ramp door model 3 is 2, 13.</em></p> Angger Setyo Aji Didik Hardianto Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 1 10 10.51742/jalasena.v4i1.558 DESKRIPSI KAPAL INDUK DENGAN JENIS DEK LANDASAN TAKE OFF DAN LANDING PESAWAT TEMPUR https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/631 <p>An aircraft carrier is a warship that functions as an air base at sea, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. the type of runway deck takes off and landing of fighter aircraft, while the type of research applied in this research is descriptive qualitative research. Data collection and analysis methods in this study apply the use of existing data. The data collected consists of various documents, books, manuscripts, mass media, websites or journals. Related to data collection, internet-based research is applied. Extracting information from various trusted sources is applied including electronic documents, reputable online journals, official websites of news agencies and government institutions. The study concluded that the flight deck of an aircraft carrier is one of the most exhilarating and dangerous working environments in the world (not to mention one of the harshest). The deck may look like a regular ground runway, but it works very differently, due to its smaller size. Aircraft operating from aircraft carriers operate in two distinct ways: conventional aircraft that roll on deck for takeoff and landing, although usually assisted by launch and capture equipment; and vertical/short takeoff and landing (V/STOL) aircraft, which are capable of using thrust vector control (TVC) to take off and recover vertically or after very short landings.</p> Endro Tri Susdarwono Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 11 19 10.51742/jalasena.v4i1.631 STUDI KELAYAKAN PERANCANGAN GALANGAN KAPAL DI KABUPATEN WAKATOBI https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/560 <p><em>Until now, there is no shipyard company for ship maintenance and repair in Wakatobi. This study aims to determine the location of the shipyard and a technical feasibility study of the shipyard. Based on the results of the field surfey, there are two (2) locations, namely Matahora Village, Wangi-Wangi Selatan District, Wakatobi Regency (location 1) and Dete Village, East Tomia District, Wakatobi Regency (location 2) which can be used as service providers. This study uses the Analytical Hierarchy Process (AHP) method to compare the two locations by considering the criteria of geography, infrastructure, materials and logistics, modes and transactions and markets. so that the results obtained location 1 is superior with an assessment weight obtained of 0.75 (75%). Referring to the government regulations regarding industrial estates, the location determined is said to be feasible, where this location has land right on the beach with a sea depth ranging from 2-5 meters and the planned location area is 3 hectares.</em></p> Edi Fedriansyah Ali Azhar Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 20 27 10.51742/jalasena.v4i1.560 STUDI PENGARUH VARIASI JARAK NOZZLE TIP TERHADAP KEBUTUHAN GAS OXY-LPG DAN DURASI PADA PEKERJAAN PEMOTONGAN PELAT BADAN KAPAL SECARA MANUAL https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/605 <p><em>The process of manually cutting plates with oxy-LPG gas is still widely used in shipyards and ship sub-contractors in Indonesia, both in the production of new building ships and repairs. In the cutting process, one of the factors that can affect the quality of cutting is the use of a tip nozzle distance. In the shipping industry, it is often found that the use of the tip nozzle distance in the process of manually cutting plates varies. The purpose of this study was to determine the effect of the nozzle tip distance on the need for oxy – LPG gas and the duration of cutting. This research method was carried out using the experimental method of cutting plates. Based on the results of data analysis, it is known that the higher the use of the nozzle tip distance, the need for oxy-LPG gas will increase while the cutting duration is not. The linear regression equation obtained between the distance of the tip nozzle and the oxygen requirement is Y = 0.0171X + 0.5357 and the tip nozzle distance with the LPG needs is Y = 0.0071X + 0.06, and the polynomial order 2 non-linear regression equation obtained between the tip nozzle distance and the cutting duration is Y = 0.9895X2 – 19.312X + 310.09 and the optimal distance of the tip nozzle is obtained at a distance of 9.758 mm with a cutting duration of 215.862 seconds.</em></p> Syahrul Setyo Pambudi Tri Agung Kristiyono Bagus Kusuma Aditya Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 28 37 10.51742/jalasena.v4i1.605 PENGARUH PENGGUNAAN BACKING KERAMIK TERHADAP KEKUATAN UJI BENDING PADA ASTM A36 DENGAN MENGGUNAKAN PROSES SMAW https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/610 <p><em>Welding with SMAW is usually used to fulfill the needs of home scale and large projects. When welding metal on large structures such as ships, the welder often has to weld back and forth on both sides of the ship, thus wasting time and energy. Therefore, a ceramic backing&nbsp; that serves as a support and molds good weld results. This saves budget and speeds up the welding process. From the above discussion, it is necessary to examine the effect of using ceramic backing on the strength of the ASTM A36 steel bending test results using SMAW welding. This research is an experimental research and the data analysis technique used is analysis of variance (ANOVA).</em>&nbsp;<em>From the results of the tensile test, there is an effect of strength on ASTM A36 steel when viewed from the average value of Ultimate tensile strength found in specimen testing that does not use backing, the average value obtained is 451.893 N/mm2. test analysis of variance, It is known that the calculated F is 5.501</em>&nbsp;<em>and the F table is</em>&nbsp;<em>7.71. From the data obtained F coun</em>t<em>&nbsp;&lt; F table</em>&nbsp;5.501<em>&nbsp;&lt; 7.71</em>&nbsp;<em>then H0 is accepted and the decision taken is H0, which means there is no difference. From the results of the bending test, there is an effect of strength on ASTM A36 steel if it is seen that the average value of the bending test is significant. test Analysis of Variance. It is known that the calculated F is 21.711</em>&nbsp;<em>and the F table is 7.71. From the data obtained, F count &gt; F table, H0 is rejected and the decision taken is H1, which means that there is a difference in the average bending test using backing and without backing on ASTM A36 specimens.</em></p> Defri Herdiansyah Nur Yanu Nugroho Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 38 43 10.51742/jalasena.v4i1.610 PRA-PERANCANGAN ALAT MATERIAL TRANSPORTER UNTUK PROSES PENGGANTIAN PELAT KAPAL DI AREA DOK https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/622 <p>The equipment used for transporter materials is an important part of a shipyard. This is a necessity of the shipyard, especially<br>the medium-sized shipyard, which serves to move materials from the warehouse to the field at the production process stage.<br>This manual ship bottom replating activity requires quite a lot of time and workers in the process, so the results obtained are<br>less efficient and uneconomical. In the process of repairing a ship to replating a plate, an obstacle was found, namely the<br>repair of material in the position of the plate at the bottom was very difficult. Basically, the transfer of a material is carried<br>out by a crane with a certain capacity and conventional methods of using pipes as a means of moving it. Looking at the<br>development of technology in modern times, it can all be said that technology is already robot-based. Therefore, the design of<br>a transporter material tool was carried out that could support the work of replating the plates at the bottom of the ship. The<br>results obtained from the evaluation of the suitability of the equipment and the application of an information system in the use<br>of transporter materials are information about the list of lifting equipment needed based on the weight of the construction and<br>the parts to be replating, especially at the bottom. From this modeling, quite efficient results were obtained with software<br>simulations with standard results of 1: 3 from data in the field. It is hoped that the manufacture of the tool model can facilitate<br>the work of replating the plates on the bottom of the ship.</p> Muhammad Syawal Bagiyo Suwasono Ali Munazid Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 44 50 10.51742/jalasena.v4i1.622 ESTIMASI PENAWARAN BIAYA PENGEDOKAN KAPAL PADA GALANGAN XYZ MENGGUNAKAN METODE REGRESI LINIEAR https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/625 <p><em>Shipbuilding company is a company engaged in the field of new ship construction services and ship repair, and has facilities for work on water. Before doing repairs. Factors that affect the general cost of docking ships are the main size of the ship and other data. As in the case study of the XYZ Shipyard, there is still a cancellation of the negotiation of general docking costs, due to the different calculation of docking costs. The purpose of this study was to determine the value of the public docking cost offer using the multiple linear regression method according to the main size of the ship (L, B, D) and the estimated duration of repair work and then an analysis of the effect of each variable used for the estimation of docking costs will be carried out. It is hoped that this research can be useful for shipyards and ship owners in estimating the optimal general cost of docking so that project cancellations do not occur and negotiations run smoothly.</em></p> Achmad Yoansyah Syah Ali Azhar Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-24 2022-08-24 4 1 51 59 10.51742/jalasena.v4i1.625 IDENTIFIKASI RISIKO KETERLAMBATAN REPARASI KAPAL KAYU MENGGUNAKAN METODE HOUSE OF RISK https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/666 <p>Dalam proses reparasi kapal kayu pada galangan tradisional tentu memiliki risiko terjadinya keterlambatan proses reparasi. Untuk meminimalisir terjadinya keterlambatan reparasi kapal kayu, perlu di identifikasi faktor-faktor risiko pada proses reparasi kapal kayu. Lalu menganalisa dan mengevaluasi potensi risiko sesuai tingkat keparahan, tingkat probabilitas, dan tingkat korelasi antar risiko. Dalam penelitian ini metode yang digunakan untuk menganalisa dan mengevaluasi potensi risiko reparasi kapal kayu menggunakan model <em>House of Risk </em>(HOR) untuk menentukan penanganan risiko yang efektif dalam mitigasi mengurangi potensi risiko keterlambatan tertinggi. Hasil identifikasi risiko (<em>risk event</em>) di galangan kapal Najib Enginering didapatkan 11 <em>risk event </em>pada proses reparasi kapal kayu. Kemudian hasil identifikasi pemicu risiko (<em>risk agent</em>) di dapatkan 21 <em>risk agent </em>dari 11 <em>risk event</em>. Berdasarkan hasil dari model HOR fase I yang diolah menggunakan diagram Pareto terdapat 4 pemicu risiko yang terpilih yaitu kode risiko A5 (Material terlambat datang), A7 (Material terlambat datang), A18 (Faktor cuaca kurang mendukung), A20 (Faktor cuaca kurang mendukung) dengan peringkat 4, 3, 2, 1 dengan nilai ARP 324, 324, 300, dan 300. Namun menurut metode brainstorming terdapat 14 pemicu risiko yang terpilih untuk aksi pencegahan dan penanganan risiko (<em>preventive action</em>). <em>Preventive action </em>yang akan diterapkan adalah dengan Memasang tenda atau menggunakan terpal sebagai atap dikarenakan upaya tersebut dianggap paling mudah diterpakan dan efektif menurut metode <em>brainstroming</em>. Dan didapatkan 14 <em>preventive action </em>dari hasil diagram Pareto untuk upaya mitigasi mengurangi potensi risiko keterlambatan reparasi. Berdasarkan hasil model HOR fase II yang diolah menggunakan diagram Pareto terdapat 5 <em>preventive action </em>yang terpilih yaitu P10 (Dilakukan pemasangan tenda atau terpal), P11 (Dilakukan pemasangan tenda atau terpal), P12 (Dilakukan pemasangan tenda atau terpal), P13 (Dilakukan pemasangan tenda atau terpal), P14 (Dilakukan pemasangan tenda atau terpal) yang mempunyai nilai ETD dengan peringkat 5, 4, 3, 2, 1 dengan nilai ETD yang sama besar yaitu 3600.</p> Rendra Ardianto Intan Baroroh Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-26 2022-08-26 4 1 60 69 10.51742/jalasena.v4i1.666 ANALISA PERHITUNGAN PERENCANAAN KEBUTUHAN MATERIAL PAINTING BLOCK DAN JAM ORANG BERDASARKAN AKTUAL PADA KAPAL BRS https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/667 <p>Kapal Bantu Rumah Sakit atau BRS adalah salah satu kapal bangunan baru yang diproduksi oleh PT. PAL Indonesia. Proses pembangunan kapal tidak hanya tentang konstruksi maupun bangunan kapal, adapun proses dimana juga saling melengkapi dalam proses pembangunan kapal, yaitu proses pengecatan kapal. Proses pengecatan atau <em>painting</em> dilakukan sebagai lapisan atau proteksi yang dapat melindungi permukaan material dari lingkungan disekitarnya terutama dalam pengendalian korosi pada material. Dalam proses <em>painting block</em> Kapal Bantu Rumah Sakit diperlukan perencanaan perhitungan kebutuhan material dan perhitungan kebutuhan jam orang. Proses pengecatan menggunakan alat yaitu <em>airless spray</em>, kuas dan <em>roll</em>. Dari perhitungan perencanaan dilakukan perbandingan dengan kebutuhan aktual dilapangan yaitu pada bengkel bbs pada divisi kapal niaga. Namun pada kasus yang sering ditemui adalah nilai yang direncanakan dalam sistem perhitungan perencanaan tersebut tidak sesuai dengan keadaan pada aktual dilapangan terutama pada bagian kebutuhan material dan biaya. Dari hasil penelitian, didapatkan hasil perbandingan pada jenis material Jotaprime, 500 sebanyak 12 pail, Alkydprimer, <em>red</em> sebanyak 17 pail, jenis Alkydprimer, <em>grey</em> sebanyak 1 pail dan <em>thinner</em> 02 sebanyak 17 liter, <em>thinner</em> 17 sebanyak 32 liter. Total jam orang (JO) sebanyak 392 dengan total biaya tenaga kerja selama 29 hari yaitu sebesar Rp 25.385.150.</p> Sherly Agustina Gaguk Suhardjito Denny Oktavina Radianto Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-26 2022-08-26 4 1 70 76 10.51742/jalasena.v4i1.667 ANALISA STRUKTUR HALF PIPE FENDER DENGAN VARIASI DESIGN PADA LAMBUNG KAPAL https://ejurnal.universitaskarimun.ac.id/index.php/jalasena/article/view/623 <p><em>In this research, we will explain about the design and analysis of ship fenders that can reduce damage to the hull structure when there is a collision between the ship and the pier. With the design of the ASTM A36 steel fender for a special study on KMP Nusa Dua using the finite element analysis method assisted by ANSYS software which is able to simulate the strength of the fender structure that we designed, from here we will get a fender design that is able to protect the hull structure when a contact occurs. collision between the ship and the dock. For the fender material data that will be used in the simulation through the ANSYS software is ASTM A36 Steel based on data from ASME which will then be given a load with the value of the ship's energy rating when leaning. The results of this simulation will get an analysis of the stress and deformation of the fenders on the hull and how well the fenders absorb the collision between the ship and the pier.</em></p> <p><em>Keywords</em><em>: </em><em>Ship Fender, Finite Elemen Analysis, Berthing Energy</em></p> Bagus Setiawan Permana Akhmad Basuki Widodo Copyright (c) 2022 JURNAL JALASENA https://scholar.google.co.id/citations?user=CKYMU8AAAAAJ&hl=id 2022-08-30 2022-08-30 4 1 77 85 10.51742/jalasena.v4i1.623