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To reduce injuries of through-type headlamp to pedestrians’ pelvic limb in collisions, a series of pedestrian upper leg impact tests are designed to evaluate the crash response characteristics of a car equipped with through-type headlights at different impact points. The test results show that when the upper leg collides with the middle area of the headlamp, the impact force peak value reaches up to 6 424 N, the injury risk is very high. The paper proposes two optimizations to headlamp including low-temperature treatment and increasing initial injury, and a series of test are performed. The results show that the risk of injury to pedestrians’ legs is reduced by reducing the structural toughness of the through-lamp lampshade by low-temperature treatment which cause the lampshade crack at early stage, which effectively reducing impact force peak value and improving the energy absorption capacity in collisions. In contrast, the effect of only weakening toughness of interior plastic parts is not obvious.
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为降低贯穿式前照灯在碰撞中对行人下肢造成的伤害,设计了一系列行人上腿型冲击试验,针对某款配备贯穿式前照灯的轿车,评价其在不同冲击点位时的碰撞响应特性,试验结果表明,上腿型撞击前照灯中间区域时,其冲击力峰值达到6 424 N,伤害风险较大,提出了对前照灯进行低温处理和增加初始损伤两种优化方式,并开展系列试验,结果显示,通过低温处理降低结构韧性,使灯罩较早发生破裂,有效降低了冲击力峰值并改善其在碰撞中的能量吸收能力,从而降低了行人腿部的伤害风险,相比之下,单独削弱内部塑料件的效果不明显。
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37(20): 241-246., articleTitle=环境温度对长玻纤增强聚丙烯单向拉伸力学性能的影响, refAbstract=null), Reference(id=1194604573806530851, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, doi=null, pmid=null, pmcid=null, year=2023, volume=37, issue=20, pageStart=241, pageEnd=246, url=null, language=null, rfNumber=[8], rfOrder=13, authorNames=QlN W M, DU B, ZHU S W, journalName=Materials Reports, refType=null, unstructuredReference=
QlN W M,
DU B,
ZHU S W, et al. Effect of Environment Temperature on Uniaxial Tensile Properties of Long Glass Fiber Reinforced Polypropylene[J].
Materials Reports,
2023,
37(20): 241-246., articleTitle=Effect of Environment Temperature on Uniaxial Tensile Properties of Long Glass Fiber Reinforced Polypropylene, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1194604567179530452, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, xref=null, ext=[AuthorCompanyExt(id=1194604567187919061, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, companyId=1194604567179530452, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Testing and Certification Business Division, China Automotive Technology and Research Center Co., Ltd., Wuhan 430056), AuthorCompanyExt(id=1194604567196307670, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, companyId=1194604567179530452, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中汽研汽车检验中心(武汉)有限公司, 武汉 430056)])], figs=[ArticleFig(id=1194604569410900206, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=vXXTsMfKHN+PjW4/lAwzTg==, figureFileBig=CSltBnbulKRljxH0WPTGPw==, tableContent=null), ArticleFig(id=1194604569469620463, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图1, caption=
上腿型冲击器, figureFileSmall=vXXTsMfKHN+PjW4/lAwzTg==, figureFileBig=CSltBnbulKRljxH0WPTGPw==, tableContent=null), ArticleFig(id=1194604569624809712, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=ImBCt28lILQKbGfwCmwoCg==, figureFileBig=dg1MAug8ehaecWS3vpJKIA==, tableContent=null), ArticleFig(id=1194604569687724273, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图2, caption=
上腿型WAD775冲击试验, figureFileSmall=ImBCt28lILQKbGfwCmwoCg==, figureFileBig=dg1MAug8ehaecWS3vpJKIA==, tableContent=null), ArticleFig(id=1194604569759027442, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=LHqAYY/fQQBrjHhB02GcWg==, figureFileBig=D44Y8FNUn6vy+T1M8CR6JQ==, tableContent=null), ArticleFig(id=1194604569821942003, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图3, caption=
车辆前部结构示意, figureFileSmall=LHqAYY/fQQBrjHhB02GcWg==, figureFileBig=D44Y8FNUn6vy+T1M8CR6JQ==, tableContent=null), ArticleFig(id=1194604569905828084, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=iJQooJzzEXmHpcQlzrNN+Q==, figureFileBig=bfFEBbX5Xfi7YeTYdA/4PQ==, tableContent=null), ArticleFig(id=1194604569972936949, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图4, caption=
车辆贯穿灯结构示意, figureFileSmall=iJQooJzzEXmHpcQlzrNN+Q==, figureFileBig=bfFEBbX5Xfi7YeTYdA/4PQ==, tableContent=null), ArticleFig(id=1194604570098766070, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=iB5nGmj0Yu6SXfECX3G8dg==, figureFileBig=lT62DmUmOPxg0lqkPFaWIw==, tableContent=null), ArticleFig(id=1194604570165874935, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图5, caption=
U4工况上腿型冲击器冲击力合力, figureFileSmall=iB5nGmj0Yu6SXfECX3G8dg==, figureFileBig=lT62DmUmOPxg0lqkPFaWIw==, tableContent=null), ArticleFig(id=1194604570220400888, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=8ihN3QCTmUSNA4w6SDwUOA==, figureFileBig=+VMK6dfJUKgtH+9hQ4LeTA==, tableContent=null), ArticleFig(id=1194604570274926841, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图6, caption=
上腿型冲击器与前照灯接触后第14 ms试验情况, figureFileSmall=8ihN3QCTmUSNA4w6SDwUOA==, figureFileBig=+VMK6dfJUKgtH+9hQ4LeTA==, tableContent=null), ArticleFig(id=1194604570329452794, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=zxxKwuj6JZPqNpa7OBCdFg==, figureFileBig=zfYnHwoLCXH8ZwcTGgkMMg==, tableContent=null), ArticleFig(id=1194604570392367355, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图7, caption=
U4和U-4点位冲击力合力, figureFileSmall=zxxKwuj6JZPqNpa7OBCdFg==, figureFileBig=zfYnHwoLCXH8ZwcTGgkMMg==, tableContent=null), ArticleFig(id=1194604570446893308, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=pHNE+z/6TZvi9pimCmRExw==, figureFileBig=rUx4E9AuiN1KT0FYW6k2yg==, tableContent=null), ArticleFig(id=1194604570509807869, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图8, caption=
工况2上腿型与前照灯接触后第7 ms试验情况, figureFileSmall=pHNE+z/6TZvi9pimCmRExw==, figureFileBig=rUx4E9AuiN1KT0FYW6k2yg==, tableContent=null), ArticleFig(id=1194604570568528126, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=GsTVoqgsQ+VlEMJ0iaX+Ew==, figureFileBig=XE6yQ7HknEgx9TWiLzdGyg==, tableContent=null), ArticleFig(id=1194604570623054079, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图9, caption=
工况3上腿型与前照灯接触后第14 ms试验情况, figureFileSmall=GsTVoqgsQ+VlEMJ0iaX+Ew==, figureFileBig=XE6yQ7HknEgx9TWiLzdGyg==, tableContent=null), ArticleFig(id=1194604570681774336, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=kCp1TbWzrojCQTd7tqEVnQ==, figureFileBig=u0ftE2ACSXzPlSazyQPZjA==, tableContent=null), ArticleFig(id=1194604570744688897, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图10, caption=
工况4上腿型与前照灯接触后第10 ms试验情况, figureFileSmall=kCp1TbWzrojCQTd7tqEVnQ==, figureFileBig=u0ftE2ACSXzPlSazyQPZjA==, tableContent=null), ArticleFig(id=1194604570807603458, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=wkp95K6CIobABLlRioV8UA==, figureFileBig=fEPJPLGiEhg8HkpoXrUn+w==, tableContent=null), ArticleFig(id=1194604570866323715, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图11, caption=
U2和U-2点位冲击力合力, figureFileSmall=wkp95K6CIobABLlRioV8UA==, figureFileBig=fEPJPLGiEhg8HkpoXrUn+w==, tableContent=null), ArticleFig(id=1194604570937626884, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=n/YS+KhFpLMz6+ZZRqJwlg==, figureFileBig=hb6RODPdNFFXlbj/DXaV9Q==, tableContent=null), ArticleFig(id=1194604571008930053, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=图12, caption=
U3和U-3点位冲击力合力, figureFileSmall=n/YS+KhFpLMz6+ZZRqJwlg==, figureFileBig=hb6RODPdNFFXlbj/DXaV9Q==, tableContent=null), ArticleFig(id=1194604571080233222, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验点位 | α/(°) | En/J | vt/m·s-1 |
| U0 | 16.36 | 405.14 | 8.78 |
| U1 | 16.39 | 404.97 | 8.78 |
| U2 | 17.52 | 397.89 | 8.71 |
| U3 | 16.37 | 405.11 | 8.78 |
| U4 | 17.10 | 400.56 | 8.73 |
| U5 | 17.45 | 398.39 | 8.71 |
| U6 | 17.93 | 395.29 | 8.68 |
), ArticleFig(id=1194604571155730695, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=表1, caption=
各冲击点位试验角度及速度
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| 试验点位 | α/(°) | En/J | vt/m·s-1 |
| U0 | 16.36 | 405.14 | 8.78 |
| U1 | 16.39 | 404.97 | 8.78 |
| U2 | 17.52 | 397.89 | 8.71 |
| U3 | 16.37 | 405.11 | 8.78 |
| U4 | 17.10 | 400.56 | 8.73 |
| U5 | 17.45 | 398.39 | 8.71 |
| U6 | 17.93 | 395.29 | 8.68 |
), ArticleFig(id=1194604571218645256, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况编号 | 试验点位 | 贯穿灯强度 | 内部塑料件 |
| 工况1 | U4 | 不变 | 不变 |
| 工况2 | U4 | 低温处理 | 不变 |
| 工况3 | U-4 | 不变 | 增加初始损伤 |
| 工况4 | U-4 | 低温处理 | 增加初始损伤 |
), ArticleFig(id=1194604571306725641, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=表2, caption=
优化对比试验工况
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| 工况编号 | 试验点位 | 贯穿灯强度 | 内部塑料件 |
| 工况1 | U4 | 不变 | 不变 |
| 工况2 | U4 | 低温处理 | 不变 |
| 工况3 | U-4 | 不变 | 增加初始损伤 |
| 工况4 | U-4 | 低温处理 | 增加初始损伤 |
), ArticleFig(id=1194604571390611722, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况编号 | 冲击力峰值 /N | 冲击力峰值降低率/% | 冲击力峰值时刻/ms |
| 工况1 | 6 424 | | 14.3 |
| 工况2 | 4 170 | 35 | 10.8 |
| 工况3 | 6 229 | 3 | 10.2 |
| 工况4 | 5 300 | 17 | 13.6 |
), ArticleFig(id=1194604571520635147, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=表3, caption=
U4和U-4点位冲击力峰值及峰值时刻
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| 工况编号 | 冲击力峰值 /N | 冲击力峰值降低率/% | 冲击力峰值时刻/ms |
| 工况1 | 6 424 | | 14.3 |
| 工况2 | 4 170 | 35 | 10.8 |
| 工况3 | 6 229 | 3 | 10.2 |
| 工况4 | 5 300 | 17 | 13.6 |
), ArticleFig(id=1194604571575161100, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
工况 编号 | 试验 点位 | 贯穿灯强度 | 内部塑料件 | 冲击力峰值/N | 力峰值降低率/% | 力峰值时刻 /ms |
| 工况5 | U-2 | 不变 | 不变 | 5 145 | | 8.8 |
| 工况6 | U2 | 低温 处理 | 不变 | 4 686 | 9 | 9.2 |
| 工况7 | U-2 | 低温 处理 | 增加初始损伤 | 4 743 | 8 | 8.9 |
| 工况8 | U-3 | 不变 | 不变 | 5 332 | | 12.6 |
| 工况9 | U-3 | 低温 处理 | 不变 | 4 541 | 15 | 8.8 |
| 工况10 | U3 | 低温 处理 | 增加初始损伤 | 4 777 | 10 | 8.6 |
), ArticleFig(id=1194604571646464269, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=表4, caption=
优化设计验证试验结果
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工况 编号 | 试验 点位 | 贯穿灯强度 | 内部塑料件 | 冲击力峰值/N | 力峰值降低率/% | 力峰值时刻 /ms |
| 工况5 | U-2 | 不变 | 不变 | 5 145 | | 8.8 |
| 工况6 | U2 | 低温 处理 | 不变 | 4 686 | 9 | 9.2 |
| 工况7 | U-2 | 低温 处理 | 增加初始损伤 | 4 743 | 8 | 8.9 |
| 工况8 | U-3 | 不变 | 不变 | 5 332 | | 12.6 |
| 工况9 | U-3 | 低温 处理 | 不变 | 4 541 | 15 | 8.8 |
| 工况10 | U3 | 低温 处理 | 增加初始损伤 | 4 777 | 10 | 8.6 |
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| 车辆状态 | 试验点位 | 冲击力峰值/N | 得分 /分 | 总计得分 /分 | 总得分率 /% | 最终得分 /分 |
初始 状态 | U0 | 5 649 | 0.351 | 5.397 | 41.515 | 1.868 |
| U1 | 4 662 | 1.000 |
| U2 | 5 145 | 0.855 |
| U3 | 5 332 | 0.668 |
| U4 | 6 424 | 0 |
| U5 | 6 406 | 0 |
| U6 | 6 132 | 0 |
低温 处理 | U0 | 5 852 | 0.148 | 9.200 | 70.769 | 3.185 |
| U1 | 4 331 | 1.000 |
| U2 | 4 686 | 1.000 |
| U3 | 4 541 | 1.000 |
| U4 | 4 170 | 1.000 |
| U5 | 5 474 | 0.526 |
| U6 | 6 660 | 0 |
), ArticleFig(id=1194604571810042127, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1194604061707178695, language=CN, label=表5, caption=
各点位冲击力峰值及得分
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| 车辆状态 | 试验点位 | 冲击力峰值/N | 得分 /分 | 总计得分 /分 | 总得分率 /% | 最终得分 /分 |
初始 状态 | U0 | 5 649 | 0.351 | 5.397 | 41.515 | 1.868 |
| U1 | 4 662 | 1.000 |
| U2 | 5 145 | 0.855 |
| U3 | 5 332 | 0.668 |
| U4 | 6 424 | 0 |
| U5 | 6 406 | 0 |
| U6 | 6 132 | 0 |
低温 处理 | U0 | 5 852 | 0.148 | 9.200 | 70.769 | 3.185 |
| U1 | 4 331 | 1.000 |
| U2 | 4 686 | 1.000 |
| U3 | 4 541 | 1.000 |
| U4 | 4 170 | 1.000 |
| U5 | 5 474 | 0.526 |
| U6 | 6 660 | 0 |
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