OPTIMASI DIAMETER POROS TERHADAP VARIASI DIAMETER SPROKET PADA RODA BELAKANG SEPEDA MOTOR

Abstract

The rear wheel shaft of a motorcycle is classified as an axle which is supporting the bearing so that the rear tire rotated well. This study is aimed to get the optimum diameter of shaft which is capable of withstanding the load in accordance with the existing load conditions, and analyzing the torque ratio between the front and rear sprocket which have varied diameter. Optimization modeling program is using Matlab 2010.

Optimization is done by using objective variable function accompanied with constraints in terms of stress and deflection on the rear axle while supporting the loads. The results of Optimization are D_o 14 mm and D_i 12,0889 mm, 12,0817 mm, 12,0627 mm, 12,0597mm with factory standard power of motorcycle (8426,41 Nm/s) which is complying to optimization rules.  The optimization result shows the decreasing of  inner diameter of the shaft along with increasing the sprocket’s diameter.

Key word : Shaft, optimization, outer diameter (D_o), inner diameter (D_i).