ANALISIS BEBAN DAN TEGANGAN SHAFT PROPELLER PADA KAPAL LCT 460 GT

Abstract

In the operation condition, the propeller shaft is subject to a combined load of torsion moment, bending moment and axial thrust force. Paying attention to the fact that the propeller shaft must sustain the load, work optimally, and last longer is essential. This research aims to determine the torque, thrust, and stress acting on the shaft on the propeller shaft at engine speed conditions of 1500, 1800 and 2000 RPM. The types of stress investigated are axial, bending, and torsional. The stresses are calculated using the finite element method and compared to the manual calculation method. The torques of the propeller shaft are 8,793,841.18 N-mm (at 1500 RPM), 7,328,200.99 N-mm (at 1800 RPM), and 6,595,380.89 N-mm (at 2000 RPM). The trusses of the propeller shaft are 29,258.5 N (at 1500 RPM), 25,990.3 N (at 1800 RPM), and 24,188.9 N (at 2000 RPM). The axial stresses are 5.0 Mpa (at 1500 RPM), 4.4 MPa (at 1800 RPM), and 4.1 Mpa (at 2000 RPM). The bending stresses are 62.150 MPa, and the shear stress value is 69.72 MPa  (at 1500 RPM), 58.097 MPa (1800 RPM), and 52.29 MPa (2000 RPM). All stresses in the propeller shaft are below the allowable stresses.