Analisis Kekuatan Drawbridge Compact Indexer Pabrik Kelapa Sawit dengan SolidWorks Simulation

Abstract

One of the ways to increase the efficiency of palm oil mills is in the
sterilization process with the development of a compact indexer system
in the cage transfer process. In the compact indexer system, a
drawbridge is added to the transfer carriage structure as a connecting
bridge with the sterilizer and tipper. In the improvement of transfer
carriage, the drawbridge design must be able to support the load from
the cage when it rests on the drawbridge. Based on the case that occurred
at PT. XYZ in West Kalimantan, there was damage to the drawbridge
structure which may be caused by operator error in operating the system
or calculation error in design. So related to the design process design in
this study, the analysis was carried out to determine the maximum stress
on the drawbridge when resisting static loading by the cage and the
value of safety factor the drawbridge design. The analysis was carried
out using the static simulation feature in SolidWorks to determine the
resistance and strength of the structure to the given static loading,
because in the previous design process only used AutoCad 2D and no
loading simulation was performed. The results of the analysis is that the
maximum von Mises Stress value on the drawbridge structure due to
static loading is 1,02 x 108 N/m2 which causes the structure to deform
by 0.222 mm. The deformation that occurs is an elastic deformation
because the von Mises Stress is below the yield strength of ASTM A36
material of 2,5 x 108 N/m2. Based on 7 static loading simulation
positions, it was found that the drawbridge did not meet the safety
factor. The drawbridge design does not meet the safety factor in the first
simulation with a safety factor value of 0.8 and the sixth simulation with
a safety factor value of 0.85 and the seventh simulation with a safety
factor value of 0.92. The part that needs improvement to increase the
safety factor of the drawbridge is the end of the drawbridge which rests
on the sterilizer rail.