Recently, Car weight reduction has become an important development goal to improve fuel efficiency. Car seat frame is a key part of the weight reduction. Existing steel seat frames have the advantages of high rigidity and durability, but have the disadvantage of heavy weight. Recently, Almag material, which are alloy of aluminum and magnesium, is attracting attention because of excellence in strength and weight reduction. At first, the core stiffness members of the seat frame are selected to optimize the weight of the seat frame. And then strength analysis and natural frequency analysis are performed for the existing steel seat frame and Almag seat frame. Based on these analysis results, optimal thickness of the Almag seat frame are determined by an automation program using a genetic algorithm.

Abstract
1. 서 론
2. 시트 프레임 중량 최적화 해석
    2.1 해석 모 델 및 경계 조건
    2.2 강철 시트 프레임 정강도 해석 및 고유진동수 해석
    2.3 시트 프레임 주요 강성 부재 선정
    2.4 부재 두께 최적화 해석 프로세스
    2.5 시트 프레임 두께 최적화 해석 결과
4. 결 론
후 기
References

• 박동규(Professor, Korea University of Technology and Education) | Dong-Kyou Park Corresponding author