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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan JTT (Jurnal Teknologi Terpadu) 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 Specta Journal of Technology International Journal of Marine Engineering Innovation and Research Jurnal Techno Bahari JMES: The International Journal of Mechanical Engineering and Sciences Journal of Marine-Earth Science and Technology PIKAT Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) WAVE: Jurnal Ilmiah Teknologi Maritim
Amalia Ika Wulandari
AProgram Studi Teknik Perkapalan, Institut Teknologi Kalimantan, Jl. Soekarno Hatta Km.15, Balikpapan, 76127, Indonesia
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 Mechanical Engineering Physics Transportation Other

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Experimental Study on The Performance Characteristics of 4 Stroke CI Engine using Biodiesel Blend from Coconut Oil suardi suardi; Feston Sandi Paribang; Wira Setiawan; Amalia Ika Wulandari; Muhammad Uswah Pawara; Andi Mursid Nugraha Arifuddin; Alamsyah Alamsyah
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.188-196

Abstract

To address the challenges faced by the government in the realm of petroleum imports, a promising strategy was adopted in the utilization of biodegradable and renewable sources of biodiesel, such as coconut oil. This research employed two distinct methodologies: Transesterification for biodiesel synthesis and a comprehensive assessment of fuel properties. Subsequently, an experimental phase assessed biodiesel within an engine environment to analysis performance metrics. Results showed that B30 (30% coconut oil, 70% diesel oil) has density of 0.850 g/cm³, B50 (50% coconut oil) at 0.861 g/cm³, and B100 (Pure coconut oil) at 0.893 g/cm³. The values differed from regional standards. As per ASTM D6751, B30 has a viscosity of 2.31 cSt, B50 3.22 cSt, and B100 is 7.02 cSt. Engine performance revealed B50 with the highest torque at 11.787 Nm, while B0 (pure hydrocarbon diesel) has a thermal efficiency of 38%. B0’s lowest SFC (Specific Fuel Consumption) is 261.12 g/kWh at 2000 watts load and 1000 rpm. Biodiesel coconut oil provided comparable power and torque (0.3% difference from B0) but consumed more fuel (21.6 % higher usage than B0). Keywords:  Biodiesel, Coconut oil, Engine performance, Fuel properties, Transesterification.
ANALISIS KEKUATAN MEMANJANG PADA GELADAK KAPAL KONTAINER DENGAN METODE ELEMEN HINGGA Amalia Ika Wulandari; Suardi Suardi; Dimas Putra Wahid Rusparyansyah
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 16 No. 1 (2022)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Berdasarkan data yang diterbitkan oleh United Nations Conference on Trade And Development, tercatat jumlah kapal kontainer aktif yang berlayar di seluruh dunia pada tahun 2016 sebanyak 6.086 kapal. Menurut data European Maritime Safety Agency, terdapat 1.101 kasus kecelakaan kapal kontainer di seluruh dunia pada rentang tahun 2011 hingga 2015. Salah satu faktor penyebab kecelakaan tersebut adalah kegagalan struktur pada geladak yang tidak mampu menahan beban yang ada selama kapal beroperasi. Penelitian ini bertujuan untuk menganalisis kekuatan memanjang pada geladak Kapal Kontainer 409 TEU berbahan baja KI-A36 dengan metode non-linear finite element method. Beban yang diberikan pada penelitian ini adalah beban dinamis berupa gelombang hoggingdan saggingserta jenis pelat pada kapal yang digunakan yaitu AH-36. Hasil penelitian diperoleh tegangan maksimum paling tinggi adalah 288,954 N/mm2 dengan safety factor 1,229 yaitu pada kondisi ketebalan pelat 75% saat sagging, dan tegangan maksimum terkecil adalah 225,216 N/mm2 dengan safety factor 1,576 yaitu pada kondisi ketebalan pelat 100% saat hogging. Momen lentur vertikal yang diperoleh adalah 4,46 x 1011 N.mm pada kondisi hogging dan -4,66 x 1011 N.mm pada kondisi sagging. Kemudian pada kondisi hogging, momen ultimate terbesar adalah 1,196 x 1012 N.mm dengan safety factor 2,68 pada ketebalan pelat 100% dan momen ultimate terkecil adalah 8,687 x 1011 N.mm dengan safety factor 1,95 pada ketebalan pelat 75%. Pada kondisi sagging, momen ultimate terbesar adalah -9,882 x 1011 N.mm dengan safety factor 2,12 pada ketebalan pelat 100% dan momen ultimate terkecil adalah -6,271 x 1011 N.mm dengan safety factor 1,34 pada ketebalan pelat 75%.
ANALISIS TEGANGAN REGANGAN PADA PELAT DECK DAN BOTTOM KAPAL FERRY RO-RO MENGGUNAKAN FINITE ELEMENT METHOD Amalia Ika Wulandari; Alamsyah Alamsyah; Cindy Lionita Agusty
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 15 No. 1 (2021)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Tegangan dan regangan merupakan suatu hal yang krusial pada kekuatan kapal, hal ini menjadi sangat penting untuk mengetahui beban maksimal yang bisa diterima oleh kapal karena antara kedua hal tersebut saling berkaitan, alasan keselematan juga menjadi satu hal mengapa tegangan regangan patut untuk diketahui. Pada penelitian ini bertujuan untuk menganalisis tegangan regangan maksimum kapal dengan variasi ketebalan pelat 100%, 90%, 80% dan 60%, menggunakan metode yakni Finite Element Method. Hasil penelitian didapatkan nilai tegangan maximum pada ketebalan 100% yaitu 312.539 N/mm2 dengan regangan maximum yang dihasilkan yaitu 1,48 x 10-3. , untuk ketebalan 90% dihasilkan tegangan maximum sebesar 353.47 N/mm2 dan regangan maximum yang dihasilkan yaitu 1,68 x 10-3. , keteblan 80% tegangan maximum yang dihasilkan sebesar 617.78 N/mm2 dengan regangan maximum yang dihasilkan yaitu 0,29 x 10-3., ketebalan 60% tegangan maximum yang dikeluarkan sebesar 820.03 N/mm2 dengan regangan maximum yang dikeluarkan yaitu 0.39 x 10-3 . Untuk pelat 100% dan 90% tidak melebihi tegangan izin, sedangkan untuk pelat 80% dan 60% melebihi tegangan izin.
DESAIN SKIMMER BOAT (KAPAL PENGAMBIL SAMPAH) DAERAH PERAIRAN SUNGAI DIKALIMANTAN TIMUR Amalia Ika Wulandari; Wira Setiawan; Taufik Hidayat; Arman Fauzi
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 14 No. 1 (2020)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Jumlah sampah yang dibawa ke Tempat Pembungan Akhir (TPA) Manggar Balikpapan saat ini mencapai 305 m3 perharinya. Lebih dari itu, sering pula dijumpai sampah-sampah yang masih tersebar di muara-muara sungai,pelabuhan dan kawasan perairan lain yang tidak diketahui jumlahnya salah satunya di Sungai Klandasan Hilir. Maka masalah yang muncul adalah bagaimana mendesain suatu kapal yang dapat mengatasi penumpukan sampah di perairan sungai dan berapa ukuran utama yang sesuai untuk perairan sungai diKalimantan. solusi yang dapat digunakan untuk mengatasi penumpukan sampah yang ada disungai yaitu dengan menggunakan bantuan Trash Skimmer Boat. Work Boat ini adalah salah satu jenis dari kapal khusus yang difungsikan untuk melakukan pengambilan sampah perairan baik sungai, danau, laut maupun kanal. Menggunakan metode Parent Design Approach dan dengan bantuan Software Maxsurf maka diperoleh ukuran utama sebesar LOA = 3 m, B = 2 m, T = 0,37 m, H = 0,7 m, B1 = 0,962 m, dan v = 6 knots. Bentuk dasar dari Trash Skimmer Boat ini berlambung pontoon catamaran yang dilengkapi dengan bak sampah dengan kapasitas 1 m3 dan setelah dilakukan survey data sampah, disarankan kapal ini dioperasikan sekali dalam seminggu selama 1 jam dengan fasilitas tambahan yaitu 1 bak penampungan sampah dan 1 unit mini portable crane dengan kapasitas angkut sebesar 300 kg yang diletakkan pada dermaga titik akhir penampungan sampah dari sungai.
ANALISIS KEKUATAN DAN UMUR KELELAHAN SHAFT PROPELLER KAPAL SPOB Alamsyah Alam; Amalia Ika Wulandari; Ivan Fadilah
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 13 No. 2 (2019)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Makalah ini membahas tentang kekuatan, putaran, dan umur kelelahan dari poros propeller kapal SPOB. Poros propeller yang dirancang harus cukup aman untuk menahan beban - beban yang bekerja saat beroperasi yang berefek pada umur kelelahan. Tujuan dari penelitian ini adalah untuk mengetahui kekuatan dan umur kelelahan poros propeller. Metode yang digunakan pada penelitian ini adalah Finite Element Method (FEM) dibantu dengan aplikasi berbasis elemen hingga. Hasil penelitian didapatkan nilai tegangan von mises (equivalent) pada poros propeller adalah sebesar 203,05 MPa dan tegangan geser sebesar 93,52MPa. Nilainya di bawah tegangan izin pada poros propeller yakni 104,67 MPa untuk tegangan izin geser dan 209,34 MPa untuk tegangan izin von mises. Sedangkan fatigue life poros propeller yakni 16,33 tahun dengan siklus tegangan sebesar 3,24 x 109.
ANALISA TEKUK PADA KAPAL FERRY RO-RO Amalia Ika Wulandari; Nurmawati Nurmawati; Anggoronadhi Dianiswara
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 13 No. 1 (2019)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Para perancang struktur kapal dapat menentukan jarak gading yang optimal dengan batasan resiko tekuk pada pelat. Penelitian ini dilakukan untuk mengetahui beban batas lateral pada masing-masing jarak gading sehingga dapat diketahui resiko tekuk yang terjadi pada pelat. Tekuk adalah suatu ragam kegagalan yang diakibatkan oleh ketidakstabilan suatu elemen struktur yang diepengaruhi oleh aksi beban. Kegagalan yang diakibatkan oleh ketidakstabilan dapat terjadi pada berbagai material. Pada saat tekuk terjadi, taraf gaya internal dapat sangat rendah. Fenomena tekuk berkaitan dengan kekakuan elemen struktur. Kekuatan tekuk pada setiap bagian struktur dapat dievalusi dengan menggunakan konsep tegangan tekuk kritis. Besarnya tegangan tekuk kritis berhubungan dengan persamaan klasik tekuk Euler dan bergantung pada apakah tekuk ini terjadi pada kondisi elastis dan tidak elastis. Penurunan beban berbanding terbalik dengan kenaikan jarak gading,semakin jauh jarak gading maka semakin kecil beban yang dibutuhkan agar pelat mengalami tekuk.
Design of Motorcycle-Passenger Ship (Klotok) Catamaran Type for Kampung Baru Balikpapan - Penajam Paser Utara Suardi; Rizky Risaldo; Andi Mursid Nugraha Arifuddin; Amalia Ika Wulandari; Wira Setiawan; Muhammad Uswah Pawara; Alamsyah
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 3 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i3.5114

Abstract

Balikpapan City has an area of 508.9 km2 which has 646,727 people living here. Balikpapan City is also known as a port city because it has two domestic ports namely Kampung Baru Port and Semayang Port. Currently, the port of Kampung Baru is still active in carrying out daily activities, namely the klotok boat crossing and also the dock for motor boats berths. The condition of mobility for crossing vessels in the port of Kampung Baru that uses boat klotok is inadequate due to the lack of supporting components for access to the ship so the safety of this port is questioned. besides that, klotok ships are also only able to carry a maximum of 21 passengers and 5 motorcycles and access to loading and unloading exits is very unsafe. The purpose of this study is to design a crossing ship that can be used safely for transportation for passengers and motorcycles that will pass the sea lane for crossing to the North Penajam Paser area. The ship is designed to have an easy access door or ramp door for passenger and motorcycle mobility to improve the safety of crossings at the port of Kampung Baru. The parent Design Approach method is used in this project, this method is one way of designing a ship using comparison or comparison, namely by taking a ship that is used as a reference for a comparison ship that has the same characteristics as designed ship. The main focus to be achieved in this research obtained a General Arrangement which has more cargo than the klotok ship with a capacity of 25 passengers and 10 motorcycles, and the dimension of the ramp door used in this final project is L 1.50 m and B 1.50 m. The Principal dimension of the ship obtained in this research is Loa = 12.50 m, Lpp = 11.50 m, Lwl = 11.96 m, B = 5.75 m, B1 = 1.64 m, H = 1.8 m, T = 0.85 m, Cb = 0.56, Vs = 15 Knots. The results of this study provide a good idea of the modernization of a comfortable ferry fleet for this area.
Strength Analysis with Variation of Construction Transverse Watertight Bulkhead On Ship Container 8842 DWT Using Finite Element Method Amalia Ika Wulandari; Suardi; Alamsyah; Aknul Ciptiandi
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5193

Abstract

Container ship are commonly employed in a variety of countries, particularly in archipelagic countries like Indonesia. It is a construction that is very important to consider when building a transverse watertight bulkhead ship because it serves as a compartment divider when the ship has a leak and also as a transverse strength of the ship. The purpose of this research is to see if various construction modifications of a transverse watertight bulkhead can bear the working load. The finite element method was employed in this study. Five different constructions of the transverse watertight bulkhead were used in this analysis. The highest stress value in the corrugated watertight bulkhead is 252.44 MPa, with a maximum deformation of 7.6433 mm, whereas the maximum stress value in the transverse plane watertight bulkhead with "angle stiffener" is 330.71 MPa, with a maximum deformation of 12,072 mm. on transverse plane watertight bulkhead with “Tee stiffener” The maximum voltage value of 301.56 MPa and value maximum deformation of 11,025 mm, on transverse plane watertight bulkhead with “bulb stiffener” maximum stress value of 331.98 MPa and value of maximum deformation of 13,421 mm, on transverse plane watertight bulkhead with “flat stiffener” maximum stress value is 484.94 MPa and value of maximum deformation of 16.13mm. According to the safety factor calculation, corrugated watertight bulkheads, transverse plane watertight bulkheads with "Angle stiffener," transverse plane watertight bulkheads with "TEE stiffener," and transverse plane watertight bulkheads with "Bulb stiffener" are all considered safe.
Testing the Inclination of an Industrial Diesel Engine Under Static Conditions According to the International Convention for the Safety of Life at Sea (SOLAS) Regulations Suardi; Muhdar Tasrief; Samsu Dlukha Nurcholik; Amalia Ika Wulandari; Wira Setiawan
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 1 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.5521

Abstract

Many industrial diesel engines are used as the main engine of the ship. Apart from being relatively cheaper, the availability of industrial engine is also very abundant, and the repair process is also not too complicated. However, when viewed from the SOLAS regulations related to the main requirements for a ship propulsion engine, it must also be considered, because it operates at sea, so that ship engines must be tougher than industrial engines, especially related to engine performance when experiencing rolling and trim. The purpose of this research is to test the feasibility of industrial diesel engines being operated on ships. By using a water-cooled single-cylinder diesel engine which is commonly used in small ships. The experimental method was used in this research to obtain optimal results according to the conditions in the field, the engine was made in three variations, namely the normal condition (without inclination angle), the rolling condition of 150, and the trim condition of 50 which complies with SOLAS regulations related to the inclination angle. The results of the research obtained torque, Specific Fuel Consumption (SFC), and engine thermal efficiency in various engine variations. The highest torque is in the condition of the 150 rolling engine, which is 13.87 N.m. The lowest SFC is in the condition of the 150 rolling engine, which is 194 gr/kW.h. and the highest thermal efficiency was also obtained at the condition of the 150 rolling engine, namely 44.9%. The higher the engine speed, the higher the engine performance value in rolling 150 conditions, and the 50 trim conditions experience an increasing trend, but in low rotation conditions (750 Rpm) the performance decreases. Seeing the results obtained, a water-cooled single-cylinder diesel engine can be used as a small boat propulsion engine.
Analysis on Deck Ship Conversion SPOB to LCT 234 GT Using Finite Element Method Amalia Ika Wulandari; Andi Mursid Nugraha Arifuddin; Nurul Huda
International Journal of Marine Engineering Innovation and Research Vol. 7 No. 3 (2022)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i3.5609

Abstract

Landing Craft Tank (LCT) is a sea transportation that serves to carry various types of cargo and heavy mining equipment and has a large size. In shipbuilding, the construction structure on the ship is not only designed to be able to accept the load from the cargo being transported but also must be able to withstand external loads caused by waves. With the modification of the Self-Propelled Oil Barge (SPOB) ship into a Landing Craft Tank (LCT), the calculation and planning process on the deck structure of the Landing Craft Tank (LCT) ship really needs to pay attention to the stress and strain strength in order to meet the safety factors that have been set in accordance with the applicable rules. This study aims to determine the maximum allowable stress value and the safety factor of the modified structure of the Landing Craft Tank (LCT) ship deck construction. The method used in this research is the finite element method. In this study uses 2 variations of the type of support "Tee Bar" and "Angle Bar". The results of this study the value of material deformation that occurs on the ship's deck with a variation of "Angle Bar" of 1.1497 mm and the value of material deformation that occurs on the deck of a ship with a variation of "Tee Bar" of 0.97269 mm. The maximum stress value acting on the ship's deck with the "Angle Bar" profile variation is 152.64 MPa and the maximum strain value is 0.00072686 mm/mm. The maximum stress value acting on the ship's deck for the "Tee Bar" profile variation is 147, 63 MPa and the maximum strain value is 0.000703 mm/mm. The value of the Safety Factor based on the criteria for the material on the ship's deck is obtained by comparing the yield stress value of the material and the maximum working stress must be greater than 1, then the deck construction with the variation of the "Angle Bar" profile is 2,326 and for the variation of the "Tee" profile type. Bar” 2,405 are categorized as safe. As for the Safety Factor based on BKI rules for the variation of the "Angle Bar" profile of 1,638 and for the variation of the "Tee Bar" profile of 1,693 it is categorized as safe. then the deck construction with the variation of the profile type "Angle Bar" is 2,326 and for the variation of the profile type "Tee Bar" 2.405 is categorized as safe. As for the Safety Factor based on BKI rules for the variation of the "Angle Bar" profile of 1,638 and for the variation of the "Tee Bar" profile of 1,693 it is categorized as safe. then the deck construction with the variation of the profile type "Angle Bar" is 2,326 and for the variation of the profile type "Tee Bar" 2.405 is categorized as safe. As for the Safety Factor based on BKI rules for the variation of the "Angle Bar" profile of 1,638 and for the variation of the "Tee Bar" profile of 1,693 it is categorized as safe.
Co-Authors Achmad Baidowi Adhyve Priambodo Bhaskara Aknul Ciptiandi Alamsyah Alamsyah A Alamsyah Alam Alamsyah Alamsyah Alamsyah Alamsyah Alamsyah Alamsyah Alamsyah, Alamsyah Andi Mursid Nugraha Arifuddin Anggit Dwi Putra Anggoronadhi Dianiswara Anggoronadhi Dianiswara Anson Novendra Pradana Arga Setya Andreardani Arman Fauzi Ayuna Noor aini Baharuddin Ali Berlian Arswendo Adietya Bimo Harseno Ramadhan Cahya Kusuma Cindy Lionita Agusty Cindy Lionita Agusty Cindy Lionita Agusty Desinta Larasati Ashar Dimas Fajar Prasetyo Dimas Fajar Prasetyo Dimas Putra Wahid Rusparyansyah Dimas Putra Wahid Rusparyansyah Erskine Simei Tonda Fernanda Wahyu Pratama Feston Sandi Paribang Firman Noor Guskarim Rompon Hariyono Hijriah Hijriah Husein Syahab Husein Syahab Husein Syahab I Ketut Suastika I Ketut Suastika Ivan Fadilah Ivan Fadilah Lista Putri Adinda Rahmi M. Uswah Pawara Mahendra Indiaryanto Mahendra Indiaryanto Mahendra Indiaryanto Merlistyo Driantama Arwan Mohammad Ardha Wiku Wicaksono Muhammad Anjas Syam Muhammad Anjas Syam Muhammad Farhan Rahmat Muhammad Yusuf Al-Hafidz Muhdar Tasrief Nurmawati Nurmawati Nurmawati Nurmawati Nurul Huda Raditya, Muhammad Yogi Rifai, Muhammad Rizky Risaldo Rodlian Jamal Ikhwani Ryan Raruk Ryanda Bayu Laksana Samsu Dlukha N Septiany Tri Pangestu Setiawan, Wira Suardi Huda Suardi S Suardi Suardi Suardi Suardi Taufik Hidayat Taufik Hidayat Taufiq Arif Setyanto Taufiq Arif Setyanto Wahyu Dhono Saputra Wira Setiawan Wira Setiawan Wira Setiawan Wira Setiawan