• 한국인터넷방송통신학회논문지
• /
• 제16권5호
• /
• pp.213-220
• /
• 2016

차량이 도로를 안전하게 주행하기 위해서는 기본적으로 운전자의 안전과 차량의 성능을 최적화시킬 수 있는 형태의 도로설계와 시공이 필요하다. 교통량이 많은 고속도로는 이러한 요인들을 반영하여 건설하고 있으나 여전히 일반국도와 지방도의 경우는 많은 문제점을 안고 있는 경우가 많다. 따라서 본 연구에서는 강원도 홍천에 위치한 굴운교차로에서 교통사고재현을 위한 PC-Crash 프로그램을 이용하여 도로의 유출부 노면이 마른 노면, 젖은 노면, 빙판 노면일 때, 차량의 속도변화에 따른 차량의 거동특성을 분석하였다. 그 결과로 굴운교차로내 유출부의 차량거동특성에 노면상태에 따른 마찰계수와 차량속도가 영향을 미친다는 사실을 확인하였으며, 이러한 시뮬레이션을 통하여 도로설계에 대한 문제점을 사전에 검증할 수 있다는 가능성을 보여주었다.

• 대한토목학회논문집
• /
• 제43권4호
• /
• pp.477-484
• /
• 2023

인구의 수명 연장에 따라 고령 운전자 수와 연령대는 지속적으로 증가하고 있다. 따라서 교통에서 고령 운전자의 연령대별 차별화된 관리를 위한 노력이 필요하다. 본 연구의 목적은 비고령 운전자 대비 초기 및 후기 고령 운전자의 부상 심각도에 영향을 미치는 인자들을 파악하여, 이들 그룹간 특성을 분석하는 것이다. 과거 5년간(2017-2021) 전국 도로에서 발생된 교통사고 자료를 적용하였으며, 기존 연구와 달리, 본 연구에서는 노안이 시작되는 40대 이후 운전자만을 대상으로 하였으며, 중년 운전자(40-64), 초기 고령 운전자(65-74), 후기 고령 운전자(75+)로 구분하여 분석을 진행하였다. 로지스틱 회귀 분석 결과, 초기 및 후기 고령 운전자의 중상 및 사망사고에 영향을 미치는 변수는 총 18개로 나타났으며, 이들 변수는 대부분 후기 고령 운전자 그룹에서 보다 민감하게 심각도를 형성하는 것으로 나타났다. 연구의 결과는 향후 고령 운전자 교통안전 정책수립을 위한 기반정보로 유용하게 활용될 것으로 기대된다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2001년도 추계학술대회 논문집
• /
• pp.229-234
• /
• 2001

The aluminum extruded sections are used to the light construction of the high speed rail vehicle structures. However, the research works on the crashworthy design of aluminum extruded sections are not published sufficiently. In this paper, the collapse characteristics of aluminum extruded sections are investigated by crush test and simulation. The scale model studies are also performed to predict the impact energy absorption characteristics of full scale model through axial crush test and simulation.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2007년도 춘계학술대회A
• /
• pp.756-761
• /
• 2007

This papered is concerned with the crashworthiness characteristics analysis of the non-step bus when it is crashed or roll-over analysis. Computer simulations is implemented using LS-Dyna explicit code which can effectively analysis dynamic response with the lapse of time. We construct a FEM model of the non-step bus under development according to the safety rules used in Europe for composite non-step buses. The crash energy and absorption rate are evaluated to understand crashworthiness characteristic of the composite non-step bus. Body deformation is also examined whether the survival space is secured for passengers.

• 한국소성가공학회:학술대회논문집
• /
• 한국소성가공학회 1997년도 추계학술대회논문집
• /
• pp.130-137
• /
• 1997

During crash of a vehicle a major part of the kinetic energy of the driver is absorbed by a steering system. The deformation characteristics of the steering system has significant effects on the injury of the driver. A part of the energy is absobed by the steering wheel and another part by the collapsable steering column. It is believed that the structure of the steering wheel has an important effect on the injury of the driver. A design criterion is suggested for steering wheels for maximum protection of drivers. Taguchi method is used to obtain the effects design parameters.

• 한국도로학회논문집
• /
• 제15권1호
• /
• pp.65-73
• /
• 2013

PURPOSES: This paper presents the results of computer simulations of roadside safety barrier, called by safety roller guardrail, consisting of rotational roller, rotation control plate, post and subsidiary members. The rotation roller and rotation control plate are made by EVA(ethylene vinyl acetate), and PE(polyester), respectively. METHODS: The occupant risk analysis has been carried out under vehicle crash condition for high containment level of SB-4 for the purpose of local road. Simulations are performed with the finite element code LS/DYNA-3D. RESULTS: The numerical results obtained by LS/DYNA-3D software from the viewpoints of vehicle stability, vehicle trajectory, occupant risk, etc. CONCLUSIONS: It is noted that not only impact severity is drastically reduced but also vehicle trajectory is improved due to the characteristics of energy absorption and rotation pattern of EVA rollers connected by control plates.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2009년도 추계학술대회 논문집
• /
• pp.109-110
• /
• 2009

• 한국자동차공학회논문집
• /
• 제10권4호
• /
• pp.234-241
• /
• 2002

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 from 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 classified 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.

• 한국자동차공학회논문집
• /
• 제13권2호
• /
• pp.108-113
• /
• 2005

The damageability and repairability of similar platform type vehicles could be very concerned with design optimization. In all the vehicles crash tested, small size passenger vehicles were weakness in aspect of damageability and repairability. The most critical area appears to be repair cost considering that parts cost is the largest portion of total repair cost segments. Besides repair cost, attaching method of front sidemember and subframe are placed special importance for impact energy absorption and damageability and repairability. So in order to improve damageability and repairability of vehicle structure and body component of the monocoque type passenger vehicles, the end of front side member and front back beam should be designed with optimum level and to supply the end of front side member as a partial condition approx 300mm. The effectiveness of design concept on the 40% offset frontal impact characteristics of the passenger vehicle structure is investigated and summarized.

• 한국도로학회논문집
• /
• 제19권6호
• /
• pp.201-212
• /
• 2017

PURPOSES : The objective of this study is to identify the characteristics affecting traffic accidents that have occurred in 564 industrial complexes nationwide from 2011 to 2015. METHODS : The traffic accidents were specified using various factors such as industrial complex type (national VS. general), industrial complex degradation (old VS. non-old), location of complex (capital VS. non-capital), and traffic law violation (speeding, signal violation, and median invasion). The average number of crashes and accident ratio (fatal, severe, and both) in terms of characteristics of industrial complexes were calculated. With a sample of crashes of the industrial complexes for 5 years, statistical significances were tested to analyze and compare the differences based on industrial complex and traffic law characteristics using parametric and non-parametric methods. RESULTS : From statistical results, it is observed that the crash frequency occurring in old industrial complexes is three times higher than that in non-old industrial complexes. Old industrial complexes located in a capital area, old national industrial complexes, and old general industrial complexes are considerably related to higher crash frequency, but the fatal accident ratio appeared to have no statistical difference across industrial complex characteristics. Severe crashes are more likely to occur in non-old industrial complexes on an average. CONCLUSIONS : It is necessary to eliminate potential threats to roads and traffic in the same manner as illegal parking in industrial complexes through the restoration of old industrial complexes. To improve the efficiency of road infrastructure, efforts should be made to improve traffic safety in accordance with industrial characteristics such as planning and operation of relevant local government programs.