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汽车与行人碰撞安全性的实验评价方法研究 总被引:3,自引:0,他引:3
汽车与行人的碰撞安全性已经成为汽车碰撞安全性研究领域的一个重要内容,其评价方法的完善对促进汽车与行人碰撞安全性的提高具有重要意义。本文介绍了目前常用的对汽车与行人碰撞安全性进行评价的两种实验方法,利用计算机仿真研究对EEVC WG17提出的部件实验方法进行了分析,并与由行人模型进行的碰撞仿真结果进行了对比,指出了部件实验方法存在的不足,并分别针对头部碰撞安全性评价和腿部碰撞安全性评价提出了相应的改进措施。 相似文献
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文中对某款车型的行人保护腿部仿真分析与试验进行对比,验证了仿真分析的精确度,并通过增加腿部支撑等方法对其进行优化,使其达到EC第一阶段法规要求。 相似文献
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行人碰撞腿部保护研究 总被引:5,自引:0,他引:5
本文从生物力学角度综合分析了行人与车辆碰撞过程中其腿部的伤害机理,并根据EEVC行人碰撞保护试验法规建立了腿部撞击器的有限元模型.利用该数值模型,本文针对某国产轿车进行了行人腿部保护的相关研究,并提出了相应的结构改进方案.计算结果表明,通过对保险杠的结构改进可以有效地减轻车辆对行人腿部的伤害,具有较高的可行性. 相似文献
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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
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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
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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
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