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.