A Study on Optimal Spot-weld Layout Design of the Shock Tower Structure Considering Fatigue Life under Random Vibration Load

불규칙 진동하중을 받는 쇽 타워의 피로수명을 고려한 점용접 위치 최적설계

In this paper, optimal spot weld layout design of the shock tower structure is performed for increasing fatigue life of spot weld and fatigue life of shock tower simultaneously. To predict the fatigue life, linear static analysis is conducted then fatigue analysis is performed by applying random vibration load. To optimize the spot weld layout, design variables that have an effect on spot weld fatigue life are selected. Based on the DOE table, spot weld fatigue analysis is conducted. Finally, response surface model is made from fatigue analysis results and optimized spot weld layout model which increases fatigue life of sport weld and fatigue life of shock tower is determined.