실험계획법을 이용한 승용차 앞 범퍼의 최적설계 = Optimum Design of Automobile Front Bumper Using Design of Experiments

다국어 초록 (Multilingual Abstract)

Bumpers are structural components to reduce physical damage to the front and rear ends of a passenger motor vehicle from low speed collisions. Regulations for bumpers include the damage criteria and the protective criteria In this study, the relative displacements are defined to consider the criteria. To absorb crash energy without significant damage to the bumper itself, foam material is installed between fascia and beam. The compressive stress-strain curve of a foam material depends on strain rates while its deviation is usually significant. Thus, it is not easy to predict the exact displacements generated in bumper structures through FEM. With considering the uncertainties of a foam material, the ranges of displacements arc calculated. Then, the optimum design is performed using design of experiments. Its objective is to find the design minimizing weight with displacements constraints. The orthogonal array of L, is introduced to include the design variables. They are the thickness of inner beam, outer beam and stay. The present study suggests the design procedure of a front bumper with uncertain stress-strain curve of a foam material.<br/>
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목차 (Table of Contents)

• ABSTRACT
  
• 1. 서론
  
• 2. 범퍼의 유한요소 해석
  
• 3. 직교배열표를 이용한 최적설계
  
• 4. 결론
  
• 참고문헌