Jurnal Riset Teknologi Perkapalan

Analisis Tahanan Kapal Berlambung Planning Hull Deadrise Angle 15 Derajat Pada Stepped 2U Menggunakan Metode Numerik

2024-07-09T08:08:18+00:00

One way to modify a hull is by installing a stepped hull. The modification is conducted to achieve a ship design that ensures performance. The basic principle of using a stepped hull is to reduce the wetted surface area and decrease the ship's resistance, thereby improving its performance. The method used in this research is a numerical method for analyzing the ship's resistance. Based on the resistance analysis on the 15-degree deadrise angle hull with a 2U stepped design, it is known that the total resistance of the ship tends to decrease with the addition of stepped and an increase in the speed and trim of the ship. The ship model with 3-stepped 2U has a smaller resistance value than the model with 1-stepped 2U and 2-stepped 2U. Hence, the addition of stepped to the ship model can reduce resistance

Studi Eksperimental Pertambahan Berat Las Blok 7 Lambung Kapal Ferry Ro-Ro 1500 GT

2024-07-09T08:09:04+00:00

Before World War II, steel ship construction used rivet construction. However, along with the development of technology, welding methods were created and are a technique for joining steel construction with results that are tighter, simpler and cost-effective for assembly. Welding is the process of joining materials by heating them to welding temperature, with or without standard pressure, and with or without the use of filler metal. The weight of the weld metal can affect the light weight tonnage (LWT) and weight or weight group of the ship and the cost of the ship. How much weld metal increases the weight of the steel structure in block 7 of the 1500 GT Ro-Ro Ferry Ship using the SMAW (Shielded Metal Arc Welding) welding process is the aim of this research. The approach was carried out experimentally, by making several specimens based on the welded construction design and welding specification procedures (WPS) for the 1500 GT Ro-Ro Ferry Ship. The increase in weld weight on an experimental basis was 2.13%, or in other words, from a total welding length of 2,395.56 meters, we obtained an increase in weld metal weight of 1,059.95 kg from the total weight of the block 7 hull structure of the 1500 GT Ro-Ro Ferry Ship of 48,595.0 kg.

Analisis Kebutuhan Armada Kapal Pada Lintassan Siwa - Tobaku

2024-07-09T07:27:55+00:00

The Siwa-Tobaku crossing is a crossing that connects Siwa Ferry Port in Wajo Regency, South Sulawesi, and Tobaku Ferry Port in North Kolaka, Southeast Sulawesi. The growth of passengers and vehicles on the Siwa-Tobaku route has increased. Hence, the prediction of cargo flows in the following year will align with the population growth and socio-economic aspects. This research aims to identify the needs of the Ferry Ro-Ro fleet on the Siwa-Tobaku route for the next five years (in 2028) and 15 years (in 2038). The analysis considers socio-economic factors and cargo flows in Wajo and North Kolaka Regency. The analysis results show that the optimal ship capacity planning to support the movement of passenger and vehicle cargo for the next five years (up to 2028) included the addition of 1 fleet at a speed of 10 knots and a frequency of 604 trips/year. The addition of the fleet will enable the transport of 309 adult passengers and 47 children, 33 units of class I-III vehicles, 59 units of class IV and V vehicles, and nine units of class VI-IX vehicles. Meanwhile, to support the movement of passenger and vehicle cargo for the next 15 years (2038), three additional fleets are required with a ship speed of 10 knots and a frequency of 604 trips/year. The addition of the fleets will enable the transport of 225 adult passengers and 34 children, 30 units of class I-III vehicles, 125 units of class IV and V vehicles, and four units of class VI-IX vehicles.

Redesain Escape Route Dan Perlengkapan Keselamatan pada Kapal Pinisi Sesuai Standar NCVS (Non-Convention Vessel Standard) Studi Kasus KLM Elysian

2024-07-09T08:13:14+00:00

Some tourists visiting Labuan Bajo for recreation prefer to stay on the Pinisi ship. As a tourist facility, the safety of passengers and ships is a significant priority for users. KLM Elysian is a Pinisi ship built in 2002 as a passenger ship and has been modified in 2022 to become a tourist passenger ship. However, the existing ship's general arrangement design has yet to meet the Non Convention Vessel Standard (NCVS) outlined by the Ministry of Transportation as safety standards for motor sailing ships, especially in the ship engine room. Hence, it can endanger the ship's crew and passengers if an emergency occurs. The engine room of KLM Elysian has only one door access from the crew room, where the access is in the form of a vertical ladder from the kitchen on the main deck. Based on the findings, two designs that meet NCVS and SOLAS standards for evacuating ship passengers and crew are proposed. The results show that the engine room redesign has complied with NCVS by providing entry and exit and emergency access for the ship's crew. In design 1, additional access is located on the left side of the main engine, the rear of the left auxiliary engine and the vertical ladder in front of the right auxiliary engine. In design 2, additional access is at the rear of the engine room bulkhead on the left side of the main engine, and the vertical ladder from the engine room to the main deck is close to the steering shaft. Based on the simulation results, design 1 requires an evacuation time of 29.00 minutes, while design 2 requires 29.15 minutes. Hence, all two designs meet the evacuation time requirements determined by SOLAS, which is less than 60 minutes.