Lightweight Design of an Outer Tie Rod Using Meta-Model Based Optimization Technique

Abstract

The outer tie rod is one of the part of steering system, the optimization process was executed to find the lightweight design. The inner tie rod was considered in the optimum design of an outer tie rod. it could be closer to the test condition than in the case of considering outer tie rod only. The aluminum forging material was considered as a weight reduction proposal. The target of optimization was the shape of the minimum weight to resist at the load of buckling. RSM and Kriging interpolation method were applied as a optimization method to consider the nonlinear shape optimization problem. Then, 16.3%, 16.6% of weight reduction was obtained from the result comparing with that of the initial model. The results of meta model optimization was compared with that of finite element method. The error values of buckling load estimation were 2.6%, 2.04%. and those of weight estimation were 0.17%, 0.13%. Therefore, it seemed that the result of Kriging model could be obtained closer to optimum value than that of RSM model. Keywords :

Thermal Stress Compensation for an Aircraft Engine Duct System Based on a Structural Redesign of Tie Rods

“…Furthermore, he also carried out stress analysis on the shape of the tie rod and concluded that a tie rod with square and circular sections is more complex than a tie rod with only a circular shape. Kim et al [24], Navale et al [25], and Wayal et al [26] found that aluminum tie rods were superior to traditional cast-iron tie rods. Kim et al also optimized the shape of aluminum tie rods using the RSM and Kriging interpolation method.…”