SIMULASI NUMERIK VARIASI JARAK ANTAR LAMBUNG HULL ASIMETRIS FLAT SIDE INSIDE TERHADAP HAMBATAN KAPAL MV KASWARI ELOK 87

Abstract

The ship's hull is a key component in the ship's design that greatly affects its overall performance. When an object moves in a fluid, an obstacle force arises that can reduce the efficiency of motion. One effective way to reduce drag on a catamaran is to vary the distance between the hulls so that the wave pattern on the bow can be manipulated so that the drag is reduced. This study aims to examine the effect of variations in distance between hulls on ship drag force using numerical simulation with Maxsurf Resistance Enterprise V8i software on the MV Kaswari Elok 87 ship. Variations were made on three types of distance between hulls based on linear form coefficient parameters  with minimum, middle, and maximum values, and tested at speeds of 10 knots, 15 knots, and 25 knots. The simulation results showed that the variation in distance between hulls had a significant effect on the amount of resistance and the coefficient of drag. The greater the distance between the hulls, the smaller the resistance received, so the value decreases. On the other hand, too narrow a distance causes interference of waves between the hulls which increases the resistance and . Based on the analysis, the -3 type provides the best performance because it produces relatively small resistance at speeds of 10 knots, 15 knots, and 25 knots, effectively prevents wave interference, and reduces hull surface friction. Thus, the -3 type is considered the most optimal to support the function of MV Kaswari Elok 87 as an efficient and comfortable tourism ship.

Keywords: Numerical simulation, distance between hulls, asymmetrical hull flat side inside, ship resistance