• 제목/요약/키워드: Side crash test

검색결과 57건 처리시간 0.02초

유전알고리듬을 이용한 측면 에어백 전개 알고리듬의 최적화 (Optimization of Side Airbag Release Algorithm by Genetic Algorithm)

  • 김권희;홍철기
    • 한국자동차공학회논문집
    • /
    • 제6권5호
    • /
    • pp.45-54
    • /
    • 1998
  • For proper release of side airbags, the onset of crash should be detected first. After crash detection, the algorithm has to make a decision whether the side airbag deployment is necessary. If the deployment is necessary, proper timing has to be provided for the maximum protection of driver or passenger. The side airbag release algorithm should be robust against the statistical deviations which are inherent to experimental crash test data. Deterministic optimization algorithms cannot be used for the side aribag release algorithm since the objective function cannot be expressed in a closed form. From this background, genetic algorithm has been used for the optimization. The optimization requires moderate amount of computation and gives satisfactory results.

  • PDF

고충돌에너지 흡수용 알루미늄 크래쉬박스 개발 (Development of Al Crash Box for High Crashworthiness Enhancement)

  • 유정수;김석봉;이문용;허훈
    • 소성∙가공
    • /
    • 제17권3호
    • /
    • pp.182-188
    • /
    • 2008
  • Crash box is one of the most important automotive parts for crash energy absorption and is equipped at the front end of the front side member. The specific characteristics of aluminum alloys offer the possibility to design cost-effective lightweight structures with high stiffness and excellent crash energy absorption potential. This study deals with crashworthiness of aluminum crash box for an auto-body with the various types of cross section. For aluminum alloys, A17003-T7 and A17003-T5, the dynamic tensile test was carried out to apply for crash analysis at the range of strain from 0.003/sec to 200/sec. The crash analysis and the crash test were carried out for three cross sections of rectangle, hexagon and octagon. The analysis results show that the octagon cross section shape with A17003-T5 has higher crashworthiness than other cross section shapes. The effect of rib shapes in the cross section is important factor in crash analysis. Finally, new configuration of crash box with high crash energy absorption was suggested.

클립형 단부분리장치를 갖는 지주의 측면충돌 시 충격완화효과 (Crash Worthiness of a Post with Clip-type Slip Base Subject to Side Impact)

  • 고만기;김기동;김경주;성정곤;윤덕근
    • 한국도로학회논문집
    • /
    • 제12권4호
    • /
    • pp.175-186
    • /
    • 2010
  • 기초에 강결되어 도로변에 노출된 각종 지주는 정면충돌 뿐 아니라 측면충돌에 특히 위험하다. 클립형 단부분리장치를 갖는 지주는 정면충돌에 효과적이고 다방향으로 분리가 가능하기 때문에 측면충돌에도 효과적이다. 본 논문은 강결된 지주의 측면충돌에 대한 위험성을 보이고 클립형 단부분리장치를 갖는 지주의 충격완화 효과를 보이기 위하여 측면충돌실험을 실시하고 그 결과를 분석 정리한 것이다. 이를 위하여 미국의 NCHRP Report 350을 기반으로 측면충돌의 기준을 제시하고 D101.6mm(t=4.2mm)의 지주가 강결된 경우와 클립형 단부분리장치로 연결된 경우에 대하여 820kg의 소형차로 충돌속도 50km/h의 측면충돌실험을 실시하였고 단부장치의 저속분리가 가능한가를 35km/h의 측면충돌실험으로 확인하였다. 강결지주는 차량의 과다한 변형 및 전복, 안전지수 측면에서 측면충돌에 치명적이지만 클립형 단부분리장치로 기초에 연결된 경우 충돌피해를 크게 줄일 수 있음을 확인하였다.

수소버스 수소저장용기의 측면충돌 안전성 평가방법 연구 (Study on Safety Evaluation Process for Hydrogen Storage System of Hydrogen Bus)

  • 김경진;신재호;한경희;한현민;인정민;김시우
    • 자동차안전학회지
    • /
    • 제14권4호
    • /
    • pp.113-119
    • /
    • 2022
  • The structural safety of hydrogen buses is being evaluated for the successful introduction of hydrogen buses. The crash test methodology, for example, side impact test procedure is being discussed for hydrogen bus structure safety with a compressed hydrogen storage system located under the bus floor. Thus this study describes a new experiment method for side impact test with compressed hydrogen storage system independently based on finite element analysis instead of side impact test using full hydrogen bus. A side crash procedure of conceptual compressed hydrogen storage structure was investigated and impact simulations were performed. The finite element models of hydrogen bus, simplified structures, fuel tank system and side impact moving barrier were set up and simulation results reported model performance and result comparison of three different simplified models. Computational results and research discussion proposed the fundamental test framework for safety assessment of the compressed hydrogen storage system.

이상화된 자동차 측면부재의 충돌특성 향상에 관한 연구 (Crashworthiness Improvement of Idealized Vehicle's Side Rails)

  • 김흥수;박신희;강신유;한동철
    • 한국자동차공학회논문집
    • /
    • 제4권2호
    • /
    • pp.189-197
    • /
    • 1996
  • In this study, the crashworthiness analysis was carried out for the hat type section side rails which had an important role of absorbing the impact energy during frontal crash. In case of a tapered hat type section model, numerical simulation models and test models were designed with varing design variables; welding pitch, taper angle, initiator shape, initiator location. The effect of variation of the design variables was investigated by quasi-static and dynamic test and numerical simulation.

  • PDF

차체 구조 차이에 따른 충돌 고주파 신호 전달성 연구 (A Study on the Signal Transmissibility of High Frequency Crash Pulse according to the Car Structure Difference)

  • 박동규
    • 한국자동차공학회논문집
    • /
    • 제21권6호
    • /
    • pp.8-15
    • /
    • 2013
  • Wide range frequency pulses occur in a car crash test. Until now, low frequency under 400Hz has been used to determine an airbag deployment criteria. Also, FIS (Front Impact Sensor) has been used to detect the crash pulse in early stage. Nowadays, technology to determine an airbag delpoyment criteria by using a high frequency crash pulse without FIS is being focused on. In this paper, the signal transmissibility of high frequency pulse for two different cars was studied. Also, signal transfer test of high frequency pulse was done by using a high speed ball impact. Signal runtime of the frontal impact is compared with that of the side impact. The signal transmissibility difference due to the car structure difference was discussed and structure change for improving the signal transmissibility was proposed.

AE-MDB시험 시 인체모형 상해치에 대한 시험 인자 영향성 연구 (The Study on influence of test factors for WorldSID injury through AE-MDB side crash test)

  • 선홍열;한표경;오은경;윤일성
    • 자동차안전학회지
    • /
    • 제7권1호
    • /
    • pp.7-12
    • /
    • 2015
  • NCAP(New Car Assessment Program) makes vehicle manufacturer improve safety performance through free competition and customers guarantee vehicle selection by providing information of vehicle safety. That's why it is important not only to meet the regulation, but also to cope with NCAP. EuroNCAP(European New Car Assessment Program) side tests have conducted by using Progressive MDB and Euro SID II in order to reproduce crash test between two vehicles over 10 years. However various researches report that Progressive MDB and Euro SID II do not reflect evolving vehicle design, impact performance and biofidelity of human. Therefore EuroNCAP has the plan to conduct AE-MDB side crash test using WorldSID which is more evolved from 2015 by replacing Progressive MDB and EuroSID II. Automobile manufacturers need to develop safety performance for new test closely. This paper is to find test set-up parameters which affect into dummy injury instead of restraint system and to research on its tendency. It is processed with mini and small car to know influence as changing vehicle size and also analyzed by DFSS(Design for six sigma) which is one of optimization tools. DFSS is vaildated by simulating CAE with L18 orthogonal array of 6 control factors adjustable as EuroNCAP requirement.

소형 승용차량의 측면충돌 시 탑승자 보호성능 평가 (Evaluation of Occupant Protection of Passenger Vehicles at IIHS Side Impact)

  • 김관희;임종훈;임장호;박인송;조종두
    • 한국자동차공학회논문집
    • /
    • 제22권1호
    • /
    • pp.46-51
    • /
    • 2014
  • 2,097 deaths out of 5,229 by traffic accident occurred by vehicle to vehicle crash and 855 deaths out of 2,097 occurred at side crash in 2011. Korean government adopted New Car Assessment Program to reduce the wounded and deaths at traffic accident in 1999 and side impact test has been added in 2003. 43 out of 53 vehicles tested in NCAP side impact rated 4 and 5 stars means the highest occupant protection. In this study three small class vehicles have been tested according to Insurance Institute for Highway Safety's side crashworthiness test protocol. IIHS test protocol uses 1,500kg moving barrier rather than NCAP's 950kg and the occupant protection rated Good, Acceptable, Marginal and Poor based on injury measure, structural integrity and head protection.

2011 KNCAP 측면충돌 및 기둥측면충돌 시험결과 고찰 (A Consideration on the Results of Side Impact and Pole Side Impact Tests in 2011 KNCAP)

  • 이동준;최영태;이광원;임재문
    • 자동차안전학회지
    • /
    • 제3권2호
    • /
    • pp.22-27
    • /
    • 2011
  • The side impact test in the Korean New Car Assessment program (KNCAP) has been conducted since 2003. The side impact test method has been contributed to the improvement of the vehicle side structure and the enhancement of the occupant protection performance for the domestic vehicles. The pole side impact test method introduced in the KNCAP in 2010 to enhance the head protection under the severe side crash environment. The pole side impact test is optional for the additional score to be added to the overall rating score. The test results of side and pole side impact test for five vehicles were introduced and compared.

신 정면 충돌 시험의 시뮬레이션 비교 분석 (Simulation Analysis and Comparison of New Frontal Impact Tests)

  • 정경진;윤영한;박지양;김동섭;오명진;곽영찬;손창기;신재곤;이은덕;권해붕
    • 자동차안전학회지
    • /
    • 제9권2호
    • /
    • pp.20-25
    • /
    • 2017
  • KNCAP is a program to evaluate the automobile safety, providing consumer vehicle safety assessment results. The safety evaluation tests are Frontal Impact, Offset Frontal Crash, Side Crash, Side Pole Crash, Rear Impact. This is the study of the offset frontal impact safety evaluation. Currently, IIHS is performing a small overlap test. NHTSA plans to implement the oblique moving deformable barrier test. Euro-NCAP plans to implement a mobile frontal impact test. Simulation is used to compare occupant behavior and injury. We have investigated whether the introduction of the test at KNCAP is necessary. The dummy model used in the simulation was the 50th percentile male Hybrid III dummy.