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차체 주요 부재의 강성이 정면 충돌 거동에 미치는 영향Effect of the Main Structure Stiffness on the Frontal Collision Behavior
- Other Titles
- Effect of the Main Structure Stiffness on the Frontal Collision Behavior
- Issue Date
- 2002
- Publisher
- 한국자동차공학회
- Keywords
- 집중질량모델; 감가속도곡선; 감가속도 특성; 정면충돌; 부재 강성; Lumped mass spring model; Deceleration time curve; Characteristics of deceleration time curve; Frontal collosion; Stiffness of member
- Citation
- 한국자동차공학회 논문집, v.10, no.4, pp.234 - 241
- Journal Title
- 한국자동차공학회 논문집
- Volume
- 10
- Number
- 4
- Start Page
- 234
- End Page
- 241
- ISSN
- 1225-6382
- Abstract
- In this study, the car crash analysis that simulates the crushing behavior of car forestructure during a frontal impact is carried out. The analysis model for front impact of a car consists of the lumped mass and the spring model. The characteristics value of masses and springs is obtained from the static analysis of a target car. The deceleration-time curve obtained Irom the simulation are compared with NCAP test data from the NHTSA. They show a good agreement with frontal crash test data. The deceleration-time curve of passenger compartment is elassified into 3 stages; beginning stage, middle stage, and last stage. And the behavior of masses at each stage is explained. The effect of stiffness variation on deceleration of passenger compartment is resolved. The maximum loaded peak-time of torque box and dash is the main factor to control the passenger compartment's maximum deceleration.
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