韩海英++赵正++谭冰花++李博



摘要: 歐盟新车评价规程Euro NCAP中的TRL腿型验算即将被FLEXPLI腿型验算替代,所以针对前者开发的某款车型在使用新标准验算时不能得到满分。运用计算机仿真对该车型前端结构进行改进:去除前保险杠吸能泡沫;重新设计W形结构的下腿部保护横梁,在碰撞点对应位置增加与FLEXPLI腿型宽度相同的加强筋,加大下腿部保护横梁与前保横梁的距离;改进导风板局部结构。对改进后前端结构进行FLEXPLI腿型验算,达到得分为满分的目标。
关键词: 汽车安全; 汽车前端结构; 行人保护; FLEXPLI腿型
中图分类号: U463.821文献标志码: B
Vehicle front structure improvement and analysis based on
FLEXPLI legform for pedestrian protection
HAN Haiying, ZHAO Zheng, TAN Binghua, LI Bo
(Advanced Engineering & Core Technology Institute, Chery Automobile Co., Ltd., Wuhu 241009, Anhui, China)
Abstract: The TRL legform checking calculation in Euro NCAP will be replaced by FLEXPLI legform checking calculation , so a vehicle type which is designed on the basis of TRL legform will fail to achieve full marks when the new standard checking calculation is pushed out. The front structures of this vehicle are improved by computer simulation. The absorbing energy foam in front bumper is removed. The Wshape pedestrian cruris protection bumper is redesigned: the reinforcing ribs are added corresponding to the impact points and its width is equal to the legform width in FLEXPLI, the distance between cruris protection bumper and front bumper is increased, and the local structures of air deflector is improved. The FLEXPLI legform checking calculation is carried out for the original and improved front structures, and the goal of full marks can be achieved.
Key words: vehicle safety; vehicle front structure; pedestrian protection; FLEXPLI legform
收稿日期: 2017[KG*9〗02[KG*9〗10修回日期: 2017[KG*9〗03[KG*9〗29
作者简介: 韩海英(1986—),女,安徽芜湖人,工程师,研究方向为汽车行人保护,(Email)hanhaiying@163.com0引言
汽车安全性是汽车设计的重要课题之一,在汽车安全设计中,行人保护越来越受到重视。欧盟新车评价规程Euro NCAP早已将行人保护作为评价内容之一,而且所占比例越来越高。[12]中国新车评价规程CNCAP计划于2018年加入行人保护评价,且五星门槛高达65%,对行人保护设计能力提出更高的要求。[3]Euro NCAP从7.0版本开始将行人下腿部评价更新为FLEXPLI腿型。[45]与原来的TRL腿型相比,FLEXPLI腿型的伤害指标和评价方法有很大变化,对车辆前端结构的要求也发生一定变化,给新车型的开发提出新的挑战。[6]
影响行人下腿部保护的车辆前端结构主要有前保险杠横梁及其吸能装置、下腿部保护横梁、发动机罩前缘、前保险杠蒙皮、前大灯等。由于车辆造型的限制,前保险杠蒙皮、前大灯和发动机罩前缘改动量较小[7],前保险杠横梁及其吸能装置和下腿部保护横梁对下腿部起主要影响作用。……