PENGARUH JARAK PROPELLER-STRUT TERHADAP FREKUENSI NATURAL STRUT DAN PERFORMA PROPELLER
The strut is a support consisting of an arm and a bearing that is attached between the propeller shaft and the hull at the stern of the ship. One of the functions of the strut is as a tool to transfer vibrations from the propulsion system to the hull. This research was conducted to determine the effect of shifting the strut position on the natural strut frequency and propeller performance before and after variations. The variation is the position of the strut according to the initial design, the position of the strut is shifted by 0.35Dprop, and the position of the strut is shifted as far as 0.5Dprop. The standard used as a reference for shifting strut positions is the BV Rules. Based on the calculation formula contained in the BV rules, the largest natural strut frequency value is obtained at the 0.5 Drop position of 1682.4 Hz, while the lowest value in the initial strut design is 1477.5 Hz. Based on the speed of advanced value from the CFD simulation, the largest thrust and torque are obtained with the strut position as far as 0.5Dprop of 86.9 kN and 20.7 kN, while for the greatest efficiency, the strut position is in accordance with the initial design, namely 51.7%.