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정행만(Haengmaan Jeong),한병기(Byoungkee Han),정재호(Jaeho Jung) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
This paper presents a study of appropriateness for the roof strength evaluation method. Current roof strength test methods do not cover the real rollover accident trend because the test condition is quasi-static. The vehicle CAE model was developed using ADAMS in this paper. The model consists of A/B/C pillar, Roof-bows, Side Roof-rail and Body frame. The model was used to simulate quasi-static and dynamic roof crush test. The quasi-static roof crush test condition was followed IIHS"s test protocol. And the dynamic roof crush test condition was followed the paper "A Proposed Rollover and Comprehensive Rating System", which was released 2009 ESV Conference because the dynamic roof crush test protocol hasn"t been developed yet. The name of dynamic roof crush test equipment is Jordan Rollover System (JRS). L<SUP>27</SUP> orthogonal array is adopted for DOE (Design of Experiment). Also, the test results show which member affects roof crush performance and presents that dominant members are different between quasi-static and dynamic roof crush test.
Small overlap Crash에 대한 Body Structure 충돌 성능 연구
정행만(Haengmaan Jeong),한병기(Byoungkee Han) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This paper presents a study of countermeasure for small overlap frontal crashes. In proportion to developing crashworthiness, most of the modern vehicles get high ratings in NCAP frontal test or Frontal offset test in IIHS. Even if the vehicles get the good rating in those tests, there are a lot of severe injuries or death rates in the frontal crash. And some portion of the frontal crash is the small overlap crash. The one of the characteristics of small overlap crash is to make intrusion of the occupant compartment and it can be a threat to the safety for occupant. In present study, the body structure crashworthiness simulation and development to get occupant safety while small overlap crash is occurred are studied based on the frontal offset crash protocol in IIHS. The result of the base model simulation is similar with real world case which has occupant compartment intrusion. And the simulation results demonstrate that the case studies for crashworthiness of the body structure are working.