PSI - Issue 27

Aknaf Sam Dabit et al. / Procedia Structural Integrity 27 (2020) 163–170 Dabit et al. / Structural Integrity Procedia 00 (2019) 000 – 000

164

2

1. Introduction Unmanned Surface Vehicles (USV) can be used for various types of tasks in different application fields such as coastal surveillance intelligence, port, and border security, free search, signal transmission between air and underwater vehicles, and submarine protection (Man Zhu, 2019). In this case, the USV concept will be used to make fish feeder vessels. Muhammad Iqbal (2017) said the catamaran is so famous and thriving as a transportation mode not only because of its large dock area but also because of the comfort and safety of its stability (Seif and Amini, 2004; Zouridakis, 2005). Yaqin (2019) said Finite Element Analysis (FEA) had become a solution to predict from a material strength that cannot be shown in a logical manner and allows designers to see all the academic forces that occur in the model. Other scholars, e.g., Rahmi et al. (2018) and Fadiji (2018), while Prabowo et al. (2016; 2017; 2018; 2019) specifically investigated highly nonlinear and complex phenomena, i.e., collision and grounding of marine transportation. In maritime areas like Indonesia, many of the people have a livelihood as fish farmers. As the case study has done in the village of Doplang, Klaten, Central Java, Indonesia, fish farmers there work traditionally by relying on human labor in the process of feeding fish. Difficulties in feeding fish are felt by fish farmers who have broader fish ponds. An autonomous unmanned surface vehicle feeder boat was created as a solution to overcome this problem. This autonomous unmanned surface vehicle feeder boat will be equipped with three ultrasonic sensors mounted on the front of the boat, which is connected with a microcontroller to move the rudder of the boat. The boat will move freely and will turn automatically before a collision with a pool barrier with a radius of 1 m. An autonomous unmanned surface vehicle feeder boat is also equipped with two boat movement control modules. Boat movements can be made automatically or manually using a remote control as needed. Fish feed tanks installed on the boat can hold fish feed reaching ± 8 kg. The balance and strength of the boat hull are very calculated in this case so that the boat can move well and be able to support the burden of all components of the boat and the weight of the fish feed. With consideration of balance, the hull type is chosen with a catamaran hull, because this hull has a good level of stability. This paper will provide a study on how to analyze the strength of the hull that has been designed using 3D mechanical design with the Finite Element Analysis (FEA) method by considering the strength values of Stress, Strain, and Displacement in the hull made of balsa wood. The amount of stress strength, strain, and displacement are used as a reference whether the hull design can be made or not. The analysis will also be carried out on tank vessels with a loading variation of 2 - 8 kg. the selection of loading models uses the static load that will be placed on the part of the boat that gets a static load from the electronic components of the boat and the fish feed. 2. Fundamental of unmanned surface vehicle Dwiko (2017) said the Unmanned Surface Vehicle (USV) or Autonomous Surface Vehicle (ASV) is an unmanned vehicle that operates on the water surface. Unmanned Surface Vehicle (USV), or what can be called an unmanned boat, has been used for various military operations since the Second World War. The development of the era, followed by the rapid growth of technology, makes developed countries competing to develop USV technology in strengthening the defense and security of their respective countries. In the military field, USV has several functions, including:  Intelligence and surveillance  Anti-submarine and anti-sea mines  Border Patrol Unmanned Surface Vehicles (USV) are marine vehicles capable of operating unmanned. They have various levels of autonomy, ranging from remotely controlled vehicles to those who manage their decisions during missions with minimal human intervention. The latter can be referred to as Unmanned Surface Vehicles (USV). Because these unmanned marine vehicles can be operated remotely by pilots from a safe location, they are suitable for operations in dangerous areas, missions, harsh environments, polluted areas, or sites related to nuclear radiation (Dwiko 2017). Katapon Tanakitkorn (2019) said the concept of force multipliers could be achieved by using several USV simultaneously. For example, the USV team can be equipped with a sonar system to search for and prevent possible underwater threats in strategic areas. This style doubling is also very useful for large-scale marine research; for example, usage is for environmental surveys (Sharma et al., 2013) and hydrographic data (Ferreira et al., 2009). For example, the form of USV development in water areas is in the design of an autonomous system of fish-spreading fishing vessel crew. The geometrical model of the boat is shown in Fig. 1.