Article(id=1172525472069075717, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, articleNumber=null, orderNo=null, doi=10.3969/j.issn.2095‒1469.2025.04.06, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1737475200000, receivedDateStr=2025-01-22, revisedDate=1741190400000, revisedDateStr=2025-03-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1757481457010, onlineDateStr=2025-09-10, pubDate=1752940800000, pubDateStr=2025-07-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757481457010, onlineIssueDateStr=2025-09-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757481457010, creator=13701087609, updateTime=1757481457010, updator=13701087609, issue=Issue{id=1172525471628673796, tenantId=1146029695717560320, journalId=1152916057816748034, year='2025', volume='15', issue='4', pageStart='427', pageEnd='619', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1757481456904, creator=13701087609, updateTime=1757489711911, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172560095704662894, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172560095704662895, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=489, endPage=496, ext={EN=ArticleExt(id=1172525472324928263, articleId=1172525472069075717, tenantId=1146029695717560320, journalId=1152916057816748034, language=EN, title=Simulation and Design Improvements to Enhance Pedestrian Leg-Impact Safety for an SUV Model, columnId=1165621801620087622, journalTitle=Chinese Journal of Automotive Engineering, columnName=Safety Technology Section/ Editor-in-Chief:CAO Libo, runingTitle=null, highlight=null, articleAbstract=
In this paper, based on the 2024 C-NCAP evaluation regulations, a finite element model of an SUV front end impacting a pedestrian's leg was established using ANSA software. Numerical simulations were carried out using LS-DYNA, and test data were employed to validate the model. Evaluation of the injury values obtained from the simulation and testing shows that the thigh bending moment and knee ligament elongation comply with the high performance limits of the 2024 C-NCAP, whereas the calf bending moment T1 does not. Further analysis shows that the lower front-end grille presses against the knee, occupies the X-direction energy-absorbing space, limits the deformation of the front bumper to absorb energy, and thus increases the calf bending moment. Two targeted structural improvements were made: the solid structure in the center of the energy-absorbing foam was replaced by an open-cell structure with a small groove at the upper end, and the license-plate mounting bracket was lowered by 10 mm along the X-direction. After these modifications, the calf bending moment T1 drops to 265.1 Nm, meeting the 2024 C-NCAP high-performance limit, and the thigh bending moment and the knee ligament elongation continue to satisfy the same criteria.
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以2024版C-NCAP评价规程为依据,运用ANSA软件建立某SUV车型前端结构与行人腿部碰撞的有限元模型,利用LS-DYNA软件进行数值模拟计算,并利用试验结果对模型进行了有效性验证。对仿真和试验得到的伤害值进行评估后发现,大腿弯矩和膝部韧带伸长量分别符合2024版C-NCAP的高性能限值,但小腿弯矩T1不符合。由于车辆前端结构的下格栅顶住膝盖部位,占据X向吸能空间,影响前保险杠变形吸能,导致小腿弯矩增加。对结构进行针对性的改进,将吸能泡沫中间位置处的实体结构改为开孔结构,且上端设有小凹槽;将牌照安装点结构的X向高度降低10 mm。结果表明,结构改进后,小腿弯矩T1为265.1 Nm,符合2024版C-NCAP的高性能限值,大腿弯矩和膝部韧带伸长量也都符合2024版C-NCAP的高性能要求。
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, authorsList=刘森海, 关永学, 徐莉, 李骏, 袁杰, 郭举)}, authors=[Author(id=1175522555868889269, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525472069075717, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=lxu10@jmc.com.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1175522555956969656, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525472069075717, authorId=1175522555868889269, language=EN, stringName=Senhai LIU, firstName=Senhai, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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刘森海(1981-),男,江西吉安人,学士,高级工程师,主要研究方向为汽车产品研发与设计。 E-mail:lxu10@jmc.com.cn
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刘森海(1981-),男,江西吉安人,学士,高级工程师,主要研究方向为汽车产品研发与设计。 E-mail:lxu10@jmc.com.cn
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| AIS等级 | 损伤程度 |
| 1 | 轻微损伤 |
| 2 | 中度损伤 |
| 3 | 严重损伤,但不危及生命 |
| 4 | 严重危及生命的损伤 |
| 5 | 危重但可能存活的损伤 |
| 6 | 不可救治的损伤 |
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AIS与人体损伤程度之间的对应关系
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| AIS等级 | 损伤程度 |
| 1 | 轻微损伤 |
| 2 | 中度损伤 |
| 3 | 严重损伤,但不危及生命 |
| 4 | 严重危及生命的损伤 |
| 5 | 危重但可能存活的损伤 |
| 6 | 不可救治的损伤 |
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| 测试点 | 类别 | 大腿弯矩数值/Nm | 小腿弯矩数值/Nm | 膝部韧带伸长量/mm |
| 坐标 | | F3 | F2 | F1 | T1 | T2 | T3 | T4 | MCL |
| y=0 mm | 仿真峰值 | 227.4 | 249.2 | 268.1 | 296.3 | 254.2 | 157.5 | 74.3 | 19.2 |
| y=0 mm | 试验峰值 | 221.3 | 275.5 | 296.8 | 301.5 | 272.6 | 186.2 | 89.8 | 19.8 |
| y=400 mm | 仿真峰值 | 232.6 | 285.3 | 287.9 | 273.9 | 270.3 | 171.5 | 84.3 | 19 |
| y=400 mm | 试验峰值 | 219.6 | 256.5 | 258.8 | 269.8 | 271.1 | 178.7 | 86.8 | 18.3 |
| C-NCAP 高性能限值 | 390 | 390 | 390 | 275 | 275 | 275 | 275 | 27 |
), ArticleFig(id=1175522559601819896, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525472069075717, language=CN, label=表2, caption=
仿真峰值和试验峰值与C-NCAP高性能限值对比
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| 测试点 | 类别 | 大腿弯矩数值/Nm | 小腿弯矩数值/Nm | 膝部韧带伸长量/mm |
| 坐标 | | F3 | F2 | F1 | T1 | T2 | T3 | T4 | MCL |
| y=0 mm | 仿真峰值 | 227.4 | 249.2 | 268.1 | 296.3 | 254.2 | 157.5 | 74.3 | 19.2 |
| y=0 mm | 试验峰值 | 221.3 | 275.5 | 296.8 | 301.5 | 272.6 | 186.2 | 89.8 | 19.8 |
| y=400 mm | 仿真峰值 | 232.6 | 285.3 | 287.9 | 273.9 | 270.3 | 171.5 | 84.3 | 19 |
| y=400 mm | 试验峰值 | 219.6 | 256.5 | 258.8 | 269.8 | 271.1 | 178.7 | 86.8 | 18.3 |
| C-NCAP 高性能限值 | 390 | 390 | 390 | 275 | 275 | 275 | 275 | 27 |
), ArticleFig(id=1175522559668928761, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525472069075717, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试点 | 类别 | 大腿弯矩数值/Nm | 小腿弯矩数值/Nm | 膝部韧带伸长量/mm |
| 坐标 | | F3 | F2 | F1 | T1 | T2 | T3 | T4 | MCL |
| y=0 mm | 改进前仿真峰值 | 227.4 | 249.2 | 268.1 | 296.3 | 254.2 | 157.5 | 74.3 | 19.2 |
| y=0 mm | 改进后仿真峰值 | 232.6 | 258.7 | 261.5 | 265.1 | 231.6 | 150.3 | 70.7 | 18.6 |
| C-NCAP 高性能限值 | 390 | 390 | 390 | 275 | 275 | 275 | 275 | 27 |
), ArticleFig(id=1175522559740231930, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525472069075717, language=CN, label=表3, caption=
y=0 mm处结构改进后仿真峰值与C-NCAP高性能限值对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试点 | 类别 | 大腿弯矩数值/Nm | 小腿弯矩数值/Nm | 膝部韧带伸长量/mm |
| 坐标 | | F3 | F2 | F1 | T1 | T2 | T3 | T4 | MCL |
| y=0 mm | 改进前仿真峰值 | 227.4 | 249.2 | 268.1 | 296.3 | 254.2 | 157.5 | 74.3 | 19.2 |
| y=0 mm | 改进后仿真峰值 | 232.6 | 258.7 | 261.5 | 265.1 | 231.6 | 150.3 | 70.7 | 18.6 |
| C-NCAP 高性能限值 | 390 | 390 | 390 | 275 | 275 | 275 | 275 | 27 |
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