Abstract
AbstractThis study aims at the structural analysis of vibration and fatigue according to the configuration of engine mount. Maximum equivalent stress or deformation is shown at bracket or case respectively. As harmonic vibration analysis, the maximum displacement amplitude is happened at 4,000Hz. Among the cases of nonuniform fatigue loads, ‘SAE bracket history’ with the severest change of load becomes most unstable but ‘Sample history’ or ‘Saw tooth’ becomes most stable. In case of ‘Sample history’ or ‘Saw tooth’ with the average stress of 4,200MPa or 0MPa and the amplitude stress of -3,000MPa or 7MPa, the possibility of maximum damage becomes 70%. This stress state can be shown with 7 times more than the damage possibility of ‘SAE bracket history’ or ‘SAE transmission’. The structural result of this study can be effectively utilized with the design on engine mount by investigating prevention and durability against its damage. Key Words : Engine mounting bracket(엔진마운팅 브라켓), Natural frequency(고유 진동수), Harmonic vibration analysis(하모닉 진동 해석), Nonuniform fatigue loads(불규칙 피로 하중들), Fatigue life(피로수명), Fatigue damage(피로 손상), Rainflow matrix(레인플로우 매트릭스), Durability(내구성)
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