특성함수와 피로해석을 이용한 로워컨트롤암의 형상최적설계

The current automotive is seeking the improvement of performance, the prevention of environmental pollution and the saving of energy resources according to miniaturization and lightweight of the components. And the variance analysts on the basis of structure analysis and DOE is applied to the lower control arm. We have proposed a statistical design model to evaluate the effect of structural modification by performing the practical multi-objective optimization considering weight, stress and fatigue life. The lower control ann is performed the fatigue analysis using the load history of real road test. The design model is determined using the optimization of acquired load history with the fatigue characteristic. The characteristic function is made use of the optimization according to fatigue characteristics to consider constrained function in the optimization of DOE The structure optimization of a lower control ann according to fatigue characteristics is performed. And the optimized design variable is D=47mm, T=36mm, W=12mm. In the real engineering problem of considering many objective functions, the multi-objective optimization process using the mathematical programming and the characteristic function is derived an useful design solution.