共查询到19条相似文献,搜索用时 250 毫秒
1.
行人保护项目是世界范围内的一个安全课题,已越来越多地受到人们的关注。下腿碰撞是行人保护评价的重要内容之一,而下腿碰撞器模块直接影响评价结果。文章介绍了当前世界上的3种下腿碰撞器模块,分析了各自的结构特点和应用,总结了3种下腿碰撞器模块对车辆行人保护评价的差异性,对我国刚刚起步的车辆行人保护项目的研究和开展提供了一定的借鉴。 相似文献
2.
3.
4.
目前汽车的安全性已经得到越来越多人的重视,尽管伴随着不少争议,CN-CAP碰撞的结果还是在消费者和厂商心中拥有了越来越重要的地位。不过,与欧洲和日本汽车市场相比,目前国内还没有车辆与行人发生事故时对行人保护的标准。2009年8月23日,广汽本田在天津中国汽车技术研究中心车辆碰撞试验室举行了国内首例行人保护碰撞试验,第八代雅阁轿车以40km/h的速度撞击Honda最新研发的新一代行人假人POLAR Ⅲ。通过对试验数据的分析,来自Honda研究所的安全技术专家宣布国内首次行人保护碰撞试验获得了圆满成功。 相似文献
5.
6.
7.
8.
为减小SUV车型在人车碰撞中对行人小腿的伤害,文章对SUV车型前保险杠造型进行了优化。分析了上支撑与下支撑布置和材料对小腿碰撞伤害值的影响,结果表明,当前保险杠上支撑安装位置处于小腿上部质心以下时,上支撑与小腿上部质心距离及上支撑材料对胫骨加速度值影响较大,上支撑与下支撑距离与下支撑材料对剪切位移影响较大。采用优化后的前保险杠防撞系统有效地控制了行人小腿伤害值,有利于该车型行人保护性能的提升,为以后SUV车型行人保护前保险杠防撞系统设计提供一些参考。 相似文献
9.
10.
11.
12.
Annually, thousands of unprotected pedestrians are killed or suffer serious injuries in accidents with moving vehicles. Numerous
automobile organizations have performed research on pedestrian safety. The European Enhanced Vehicle- Safety Committee (EEVC),
Working Group 17 (WG17) proposed three component subsystem tests to evaluate the friendliness of a vehicle to pedestrians:
the legform to hood test, the upper legform to bonnet leading edge test and the headform to bonnet top test. In assessing
the pedestrian friendliness of a vehicle, the present study adopted the WG17 regulations of the three component subsystem
tests. We herein describe in detail a finite element subsystem model built to analyze the pedestrian friendliness of a vehicle
using LS-DYNA. The first objective of this study was to simulate these three component subsystem impact tests and evaluate
car front aggressiveness. The second objective was to analyze the frontal structures of a vehicle and, based on the simulation
results, identify dangerous areas and provide suggestions for vehicle front design that may decrease pedestrian injuries.
The analysis of these models and the results obtained may be used to help evaluate the pedestrian friendliness of a vehicle
and guide the future development of pedestrian-friendly vehicle technologies. 相似文献
13.
Until recently, passenger cars have primarily interested in pedestrian protection performance. Nowadays, however, it is important
for a sport-utility vehicle (SUV) to meet the bumper system standards for pedestrian safety. For a SUV bumper system, there
are some difficulties in attaining a high level of pedestrian performance for the lower legform. An SUV has a high bumper
position from the ground level, and the bumper approach angle must also be secured, which has an effect on car insurance fees.
Due to these reasons, it is difficult to meet the pedestrian performance of the lower legform for an SUV. In this paper, a
comparative study was performed on various SUV bumper systems, and a concept model for a SUV bumper system was developed,
which is expected to meet the pedestrian performance by using the Pugh method. The design control factors were defined to
affect the bumper pedestrian performance through the experiences of tests and analyses. For the noise factor to affect the
pedestrian performance, the deviation of the impactor position was selected at the moment of impact. The design control factors
were optimized by using the Taguchi optimization technique. For the Taguchi method, an L18 orthogonal array table of design
control factors was used in the optimization process. Particularly, for the optimization of the bumper corner region, an optimization
analysis was performed three times to meet pedestrian performance. Based on the results of the Taguchi optimization method,
the sensitivity of the bumper design parameters was studied, and a new SUV bumper system is proposed that satisfies the pedestrian
performance of the lower legform. The optimized bumper system should obtain a full Euro-NCAP score of 6 points for the bumper
test. The pedestrian performance of the optimized bumper system is validated by using a CAE (Computer Aided Engineering) analysis,
which has been proven to be in accurate. A comparison between the test and analysis results is shown for the validation of
accuracy. By using the optimized bumper system, the tests and development costs of a bumper can be reduced. 相似文献
14.
15.
16.
Vehicle safety has become the most important issue in automobile design. However, all efforts to improve safety devices focus
on enhancing safety features for occupants. Notably, pedestrians are the second largest category of motor vehicle deaths,
after occupants, and account for about 13 percent of motor vehicle deaths. It is essential to design pedestrian-friendly vehicles
and pedestrian protection systems to reduce pedestrian fatalities and injuries. To effectively assess pedestrian injuries
resulting from vehicle impact, a deformable pedestrian model must be developed for vehicle-pedestrian collision analysis.
This study constructs a pedestrian-collision numerical model based on LS-DYNA finite element code. To verify the accuracy
of the proposed deformable pedestrian model, experimental data are used in the pedestrian model test. This study applies the
proposed model to analyze the dynamic responses and injuries of pedestrians involved in collisions. The modeled results can
help assess vehicle pedestrian friendliness and assist in the future development of pedestrian-friendly vehicle technologies. 相似文献
17.
基于未来出行交通事故场景研究 (Future Mobile Traffic Accident Scenario Study,FASS) 数据库中135例人车碰
撞事故深度调查数据,对造成行人头部损伤的来源及车速对头部损伤来源的影响进行了统计分析。采用Spearman相关系
数检验法,建立了车辆速度区间与头部平均 MAIS 的回归模型。结果表明,行人头部致伤物主要来源于车辆,占比约
58%,其次为地面,占比约40%。行人事故中,碰撞车速对行人头部损伤来源的分布情况有一定的影响,当车速低于30
km/h时,行人头部损伤主要来源为地面,当车速为 [30,50] km/h时,车辆和地面对行人头部造成的损伤风险相近,当
车速高于 50 km/h时,行人头部损伤主要致伤物来源为车辆。因此,在进行交通损伤流行病学研究、交通损伤事故数据
库构建时,特别是在中低速碰撞中,应重视地面对头部造成损伤的风险。 相似文献
18.
行人头部碰撞保护一直是汽车行人安全设计的难点,随着E—NCAP对行人保护要求的不断提高,头部保护的得分比重对于获得高星级评价至关重要。文章基于某车型E—NCAPV6.2五星性能开发,采用虚拟仿真与试验测试有效结合的方法,对发动机罩进行了优化设计,提出了一种有利于行人头部碰撞保护的发动机罩。改进前后测试成绩的对比分析表明,该结构可极大优化行人头部碰撞保护效果,使发动机罩头部测试区域得分总分提升至24.43分,满足E—NCAPV6.2五星行人保护性能要求。可为后续设计提供参考,具有很高的推广价值。 相似文献