Perencanaan Distribusi Penerangan Kapal Ikan Multipurpose 70 GT Menggunakan Metode Zonal Cavity

The 70 GT multipurpose fishing vessel is a type of vessel designed to operate longer at sea. This ship has a relatively wider cargo space with a variety of fishing gear (multipurpose). The ship is propelled by a 283 kW diesel engine and the source of electric power is supplied by a 20 kW diesel generator. The purpose of this study is to determine the amount of electric power used for ship lighting. The method used is the lumen method or the zonal cavity method. This method is used to determine the proper lighting standards on board according to regulatory standards from the American Bureau of Shipping (ABS) class. The results of the study showed that the total electric power needed for lighting on board was 0.4 kW. LED lights are an alternative in determining the type of lighting that is energy efficient and durable on board.-Kapal ikan multipurpose 70 GT merupakan salah satu jenis kapal yang didesain untuk beroperasi lebih lama di laut. Kapal ini memiliki ruang muat yang relatif lebih luas dengan alat tangkap yang beraneka ragam (multipurpose). Kapal digerakkan dengan mesin diesel 283 kW dan sumber tenaga listrik disuplai dari generator diesel 20 kW. Tujuan dari penelitian ini adalah untuk menentukan besaran daya listrik yang digunakan untuk penerangan kapal. Metode yang digunakan adalah metode lumen atau zonal cavity method. Metode ini digunakan untuk mengetahui standar pencahaayan yang tepat di atas kapal sesuai dengan standar regulasi dari American Bureau of Shipping (ABS) class. Hasil dari penelitian didapatkan total daya listrik yang dibutuhkan untuk penerangan di atas kapal adalah 0,4 Kw. Lampu LED menjadi sebuah alternatif dalam penentuan jenis lampu penerangan yang hemat energi dan tahan lama di atas kapal

Effect of Post Weld Heat Treatment on Tensile Strength of ASTM A36 Welded Joints: Application on Hull Vessel Material

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

A Finite Element Analysis of Structural Strength of Ferry Ro-Ro’s Car Deck

Ferry Ro-Ro is a type of ship used to carry passengers and vehicles. This ship has several decks such as navigation decks, passenger decks, and car decks. The car deck is subject to a heavy load as it should accommodate vehicle loads. This study aims to conduct a finite element analysis to determine the stress and deformation experienced on the car deck of the Ferry Ro-Ro and determine the safety factor based on BKI (Indonesian Classification Bureau). The method used in this study is the Finite Element Method (FEM) which has been applied in the finite element based-applications namely Ansys Workhbench. The simulations are carried out using the software by varying the thickness of the car deck’s plate, the plate is subjected to pressure loads which are car loads accommodated by the car deck. Moreover, the fixed support is applied in the deck during the simulation. Based on the simulation results of variations of 90, 100, and 110% plate thickness. It is obtained that the smallest plate experienced maximum stress and the obtained safety factor of all plate thickness variations was satisfied the BKI Standard.Ferry Ro-Ro adalah jenis kapal yang digunakan untuk membawa penumpang dan kendaraan . Kapal ini memiliki beberapa geladak seperti geladak navigasi , geladak penumpang dan geladak kendaraan. Geladak kendaraan mengalami beban yang besar karena harus menampung beban kendaraan. Penelitian ini bertujuan untuk melalukan analisis alemen hingga untuk mengetahui tegangan dan deformasi yang terjadi pada geladak kendaraan kapal Ferry Ro-Ro dan mengetahui safety factor berdasarkan BKI.  Metode yang digunakan pada penelitian ini yaitu metode elemen hingga telah diterapkan pada aplikasi berbasis elemen hingga. Simulasi dilakukan dengan menggunakan software tersebut dengan memvariasikan ketebalan plat kapal. Berdasarkan hasil simulasi variasi dari 90, 100, dan 110% ketebalan pelat diperoleh hasil bahwa plat paling kecil mengalami tegangan maksimum dan safety factor yang diperoleh dari semua variasi pelat memenuhi standar BKI