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All Journal JST ( Jurnal Sains Terapan ) JTT (Jurnal Teknologi Terpadu) Turbo : Jurnal Program Studi Teknik Mesin INOVTEK POLBENG Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Wave: Jurnal Ilmiah Teknologi Maritim JURNAL SAINTIS Specta Journal of Technology International Journal of Marine Engineering Innovation and Research Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Collaborate Daily Book Series Media Elektrik WAVE: Jurnal Ilmiah Teknologi Maritim
Alamsyah
Institut Teknologi Kalimantan
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 Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Pengaruh Perbandingan Resin Dan Katalis Terhadap Kekuatan Tarik Komposit Fiberglass-Polyester Untuk Bahan Pembuatan Kapal Alamsyah Alamsyah; Taufik Hidayat; Arif Nur Iskandar
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 1, Nomor 2, Edisi Juli 2020
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v1i2.10760

Abstract

The use of fiberglass-based composites is often found in shipbuilding. However, the use of composites in the shipbuilding process does not yet have clear and standard quality standards regarding the ratio between the amount of resin and catalyst used. Meanwhile, the amount of use of resin and  atalyst has an influence on the strength of the fiber-reinforced composite. This study aims to determine the effect of the amount of catalyst mixed into the resin on the tensile strength of fiberglass-polyester composites. The method used in this study is an xperimental method that uses a tensile testing machine by varying the amount of catalyst in the resin from 0.5% to 2%. In this study, the results showed that composites with a catalyst amount of 0.5% had a tensile strength value of 4.85 kgf/mm2, elongation of 2.43% and elastic modulus of 2.26 kgf/mm2. Composites with a catalyst amount of 1% had a tensile strength value of 5.02 kgf/mm2, longation of 1.71% and elastic modulus of 2.96 kgf/mm2. Composites with a catalyst amount of 1.5% had a tensile strength value of 5.49 kgf/mm2, longation of 1.97% and elastic modulus of 3.07 kgf/mm2. Composites with a catalyst amount of 2% had a tensile strength value of 4.97 kgf/mm2, longation of 1.62% and elastic modulus of 3.11 kgf/mm2. The tensile strength of fiberglass-polyester composites has increased in the amount of catalyst 0.5 to 1.5% and has decreased in the amount of catalyst 2%. The highest value of tensile strength is in composites with a composition of 100% resin and 1.5% catalyst.
Analisis Perbandingan Kinerja Drag Force dan Lift Force Antara Rudder Konvensional dan Rudder Fish Tail Dengan Menggunakan CFD Abrari Noor Hasmi; Alamsyah Alamsyah; Asram Dio Pratama
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 2, Nomor 2, Edisi Juli 2021
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v2i2.13979

Abstract

Rudder is a device for changing the direction of a ship by changing the direction of the air currents which results in maneuvering the ship. Rudder is placed at the rear end of the hull of the ship / stern behind the propeller. The most commonly used type is the conventional type. But as for the type of rudder in addition to the conventional type, namely the type of fishtail. This study head to analyze the difference in performance between conventional rudder and fishtail rudder on the value of Drag Force and Lift Force. The method used is the Clark's equation with the help of CFD-based applications to determine the performance generated at the time of Drag Force and Lift Force ships by varying the turning angle of 0°,5°, 10° and 35°. The results showed that conventional rudder has a better level of drag force effectiveness and drag coefficient than fish tail rudder, meanwhile, fish tail rudder has a level of effectiveness of lift force and lift coefficient which is better than conventional rudder.
Analisis Fatigue Life pada Poros Kapal TB. 27 M Menggunakan Metode Elemen Hingga Alamsyah Syah Alam
INOVTEK POLBENG Vol 10, No 2 (2020): INOVTEK VOL 10, NO 2
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35314/ip.v10i2.1653

Abstract

Paper ini membahas tentang sistem propulsi yang berfungsi sebagai penggerak kapal. Salah satu bagian sistem propulsi yang sangat penting adalah poros propeller. Tekanan berlebih yang terjadi pada poros propeller tentunya harus ditunjang dengan komposisi material yang baik, sehingga poros propeller bisa bekerja maksimal dan bertahan lebih lama. Tujuan penelitian mengetahui nilai tegangan yang bekerja dan fatigue life pada poros propeller kapal TB. 27 M. Metode yang digunakan pada penelitian ini adalah elemen hingga dan Palmgren-Miner cumulative damage dengan memberikan variasi beban putaran mesin 100%, 80% dan 60%. Hasil penelitian didapatkan nilai tegangan saat kondisi putaran mesin 100%, 80%, dan 60% secara berurutan yakni sebesar 201.85 Mpa, 176.69 Mpa, dan 150.03 Mpa dimana tegangan yang terjadi di bawah tegangan luluh material poros propeller yakni 215 Mpa. Untuk nilai fatigue life didapatkan saat kondisi putaran mesin 100%, 80%, dan 60% secara berurutan yakni sebesar 14 tahun, 28 tahun dan 51 tahun dengan jumlah siklus minimum yakni 2.458 x 108 serta siklus maksimum yakni 8.927 x 108.
Analisis Desain Lifting Poonton Untuk Kapal Kecil Alamsyah bin Muhammad Saleh
INOVTEK POLBENG Vol 10, No 1 (2020): INOVTEK VOL. 10 N0 1
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1033.117 KB) | DOI: 10.35314/ip.v10i1.1405

Abstract

PT. XYZ  mengembangkan prototipe  pontoon lifting berbahan alumunium yang berfungsi sebagai floating dock untuk keperluan reparasi kapal. Diameter dan panjang tabung sangat mempengaruhi besar gaya angkat yang dihasilkan oleh pontoon lifting. Penelitian ini bertujuan untuk mengoptimasi desain  poonton lifting agar   dapat  mengangkat  kapal  kecil. Metode yang digunakan yaitu dengan prisnsip Archimedes dan persamaan luas lingkaran. Dari hasil penelitian didapatkan ukuran utama yakni L = 31 m, diameter tabung bawah (D) = 1.88 m, diameter tabung atas (D) = 0.44 m Tmax = 3.55 m, Tmin = 0.28 m serta displasemen = 80.90 ton. Berdasarkan hasil perhitungan menggunakan prinsip Archimedes didapatkan kesimpulan bahwa pada volume air ballast 8,334  meter3 di tabung bagian belakang dan dengan volume air ballast 63,716 meter3 di tabung bagian depan pada kondisi even keel.
ANALISIS PERBANDINGAN PENGUJIAN TURNING CIRCLE ANTARA RUDDER KONVENSIONAL DENGAN RUDDER JENIS FISHTAIL PADA MODEL KAPAL BARGE DENGAN METODE OPEN FREE RUNNING MODEL TEST Abrari Noor Hasmi; Alamsyah Alamsyah; Muhammad Nuzhand
INOVTEK POLBENG Vol 11, No 1 (2021): INOVTEK VOL.11 NO1, 2021
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35314/ip.v11i1.1764

Abstract

Turning circle adalah salah satu uji yang harus dipenuhi oleh kapal dalam menentukan kemampuan manuvernya selama berlayar. Penelitian ini bertujuan untuk mengetahui perbandingan nilai tactical diameter  saat proses turning circle dari penggunaan model rudder konvensional dan rudder fishtail. Metode yang digunakan pada penelitian ini adalah open free running test. Untuk hal tersebut, dibuat sebuah model kapal yang dilengkapi dengan sistem propulsi dan GPS. Selama eksperimen, kapal dijalankan dengan putaran propulsi yang tetap dan dibelokan menggunakan rudder dengan sudut belok konstan sementara posisi kapal terus menerus disimpan menggunakan GPS. Metode yang digunakan yakni metode eksperimen dengan memvariasikan kecepatan yaitu sebesar 1 mph, 1,5 mph serta 2 mph dengan masing-masing dari kecepatan itu menggunakan  variasi sudut belok yang berbeda pula sebesar 10°, 15°, dan 35°. Turning circle dibuat menggunakan AutoCAD berdasarkan hasil test. Analisis menunjukan bahwa rudder fishtail memiliki tactical diameter yang lebih kecil, yaitu sekitar 18% lebih kecil dibandingkan rudder konvensional.
Analisis kekuatan struktur ramp door haluan pada kapal Ferry Ro-Ro 1500 GT dengan variasi beban menggunakan Finite Element Method Alamsyah Alamsyah; Amalia Ika Wulandari; Muhammad Uswah Pawara; Muhammad Yusuf Al-Hafidz
TURBO [Tulisan Riset Berbasis Online] Vol 11, No 2 (2022): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i2.2161

Abstract

Ramp Door is a door to put a vehicle into a Ro-Ro ship or any other type of ship that transports vehicles. The use of Ramp Door is needed to facilitate the process of unloading and loading vehicles from the crossing dock to the ship and vice versa. This study aims to analyze the strength of Ramp Door structure with load variations from various types of vehicles in order to compress the maximum stress results and safety factors. The method used is the FEM method with the help of an element-based application up to. The results of the study obtained the maximum stress value of Ramp Door Bow with MPV vehicle type at an even load is 43.26 MPa. In this type of SUV vehicle, the maximum stress with an even load is 50.37 MPa. In sedan vehicle type the maximum stress with an even load is 37.61 MPa. in commerial vehicle type the maximum stress with an even load is 45.70 MPa. In this type of small truck vehicle, the maximum stress with an even load is 81.53 MPa. In large truck vehicles the maximum stress with an even load is 302.48 MPa. In this type of vehicle, the maximum stress bus with an even load is 178.08 MPa. For the largest safety factor value is a type of Commercial vehicle with a value of 8.91. While the smallest safety factor value is the type of Big Truck vehicle with a safety factor value of 1.01.
Analisis getaran lambung kapal patroli 28 meter Amalia Ika Wulandari; Alamsyah Alamsyah; Muhammad Fikri Fadlurrahman
TURBO [Tulisan Riset Berbasis Online] Vol 11, No 2 (2022): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i2.2006

Abstract

The ship's vibration is something that has a considerable influence on the structural resistance and comfort of the crew. Vibration analysis needs to be done to ensure the durability of the ship's construction. Ship construction that is unable to withstand the vibrations it experiences is at great risk of structural failure. Vibration on the ship is also something that can only be suppressed and cannot be completely eliminated. The objectives to be achieved in this final project are to get the value of the ship's resistance and get the root-mean-square value of the maximum vibration speed that occurs on the ship. The calculation of the value of the ship's resistance is carried out using the Holtrop resistance calculation method, while the determination of the root-mean-square maximum speed of vibration is carried out using the Ansys Workbench. The resistance value obtained on this ship is 7,165 kN. The root-mean-square value of the greatest maximum vibration velocity occurs at a frequency of 47.2 Hz at 76.71906943 m/s. Due to the limit value of r.m.s for aluminum vessels is 15 mm/s, then the value of r.m.s at a frequency of 47.2 Hz that occurs on ships does not meet class standards.
Effect of Post Weld Heat Treatment on Tensile Strength of ASTM A36 Welded Joints: Application on Hull Vessel Material M. Uswah Pawara; Alamsyah Alamsyah; Muhammad Syarif; Faisal Mahmuddin; Harifuddin Harifuddin
International Journal of Marine Engineering Innovation and Research Vol 8, No 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.16312

Abstract

In fact, in the welding process, there are many problems that arise. Such as cracking caused by excessive stress Residual stress can result in a decrease in the mechanical properties of a material such as brittle fracture, fatigue, and cracking. The purpose of this study was to determine the comparison of tensile strength in ASTM plate welded joints A36 with variations of single vee butt and single bevel butt and knowing the comparison of the effects ofpost-weldd heat treatment on welded joints with variations of single v butt and single bevel butt joints. The method used in this research is experimental. The results of the data obtained in this study The value of the tensile strength of the Single Bevel Butt joint without the influence of Heat Treatment is 153.87 MPa, the tensile strength of the Single Vee Butt joint without the influence of Heat Treatment is 161.75 MPa and the tensile strength of the seam Single Bevel Butt with the effect of Heat Treatment is 196,65 MPa. The tensile strength of the Single Vee Butt seam with the effect of Heat Treatment is 173,36 MPa.
Motion Response on The Water Ambulance Ship Alamsyah Alamsyah; Ardhi Hidayatullah; Suardi Suardi; Wira Setiawan; Habibi Habibi; Samsu Dlukha Nurcholik
International Journal of Marine Engineering Innovation and Research Vol 8, No 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.15481

Abstract

In designing a ship, it is necessary to know the response of the ship's motion before sailing. The purpose of this research is to determine the ship's motion response to waves as well as ship speed in ship loading operational conditions. The method used in this study is the B-spiline mathematical equation and the strip theory method, with the help of ship motion software, which varies the ship's load by 100% DWT, 50% DWT, and 25% DWT. While the highest significant amplitude heave value occurs on a ship with 100% DWT conditions with a speed of 18 knots and a wave direction of 900, which is 2.70 meters, the highest significant value of amplitude pitch occurs on a ship with a condition of 25% DWT with a speed of 6 knots and a wave arrival direction of 1800, namely 1.10 degrees, and the highest significant value of roll amplitude occurs in ships with 25% DWT conditions with speeds of 18 knots with a wave arrival direction of 900, which is 3.42 deg. The research results detected at a speed of 18 knots for the significant amplitude heave value, the significant amplitude pitch value, and the maximum RAO value still meet the Nordforsk criteria.
Analisa Kekuatan Bracket Pada Kapal Ro-Ro Menggunakan Aplikasi Finite Element Alamsyah Alamsyah; Amalia Ika Wulandari; Bimo Harseno Ramadhan
SPECTA Journal of Technology Vol. 4 No. 3 (2020): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.244 KB) | DOI: 10.35718/specta.v4i3.218

Abstract

In the transverse frame of the ferry ro-ro, there is a construction of the amplifier called the bracket contained on the car deck. The bracket construction functions to connect 2 (two) other constructions such as transferred deck beam and frame. The purpose of this study is to determine the strength of the bracket against the maximum work stress that occurs after being compressed. The method used is a finite element analysis with the help of finite element based applications. On the bracket, modulus optimization will be carried out to approach yield strength after being subjected to deck loads and ship side loads. The results showed that the solid bracket had a modulus of wsolid = 1485.168 cm3, while the cross-section modulus of the bracket with a circle hole diameter 60 mm w60 = 1463.973 cm3, a bracket with a circle hole diameter 70 mm was w70 = 1451.511 cm3, and a bracket with a diameter circle hole 75 mm is w75 = 1443.771 cm3. Maximum working stress that occurs in solid brackets is σmax solid = 92.0871 N/mm2, with holes 60 mm ie σmax d60 = 96.6237 N/mm2, and with holes 70 mm ie σmax d70 = 155.999 N/mm2, does not exceed yield stress (σmax < σy = 250 N/mm2). While the bracket tension with the hole 75 mm is σmax d75 = 272.861 N/mm2, exceeding the yield stress (σmax < σy = 250 N/mm2). So that the perforation on bracket construction can be done only on diameter sizes d = 60 mm and 70 mm. This information can minimize the use of steel material that has an effect on the ship's steel weight calculation.
Co-Authors Abrari Noor Hasmi Adhy Rahmat Agus Budianto Amalia Ika Wulandari Amalia Ika Wulandari Amalia Ika Wulandari Andi Mursid Nugraha Arifuddin Ardhi Hidayatullah Ardhi Hidayatullah Arif Nur Iskandar Asram Dio Pratama Bebeto Fandi Birana Bimo Harseno Ramadhan Christian Hendra Gonawan Cindy Lionita Agusty Daeng Paroka Elyazha D. C. Faisal Mahmuddin Faisal Mahmuddin Feston Sandi Paribang Habibi Habibi Habibi Habibi Habibi Handika Sanjaya Sitanggang Harifuddin Harifuddin Irfan Fadillah Irvan Setiawan Ivan Fadilah M. Uswah Pawara Merlistyo Driantama Arwan Muh. Reza Fachrul Jaya Muhammad Dipo Nugroho Muhammad Fikri Fadlurrahman Muhammad Nuzhand Muhammad Syarif Muhammad Yusuf Al-Hafidz Nurbaya Nurbaya Rizky Risaldo Rodlian Jamal Ikhwani Rodlian Jamal Ikhwani Ryo Herlambang Samsu Dlukha N Samsu Dlukha Nurcholik Septiany Tri Pangestu Sherly Clara Suardi Suardi Suardi Taufik Hidayat Wardina Suwedy Wardina Suwedy Widya Yulia Astin Wira Setiawan Wira Setiawan Wira Setiawan