Article(id=1208718238326845932, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1208718233222386276, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20230351, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766110484916, onlineDateStr=2025-12-19, pubDate=1721404800000, pubDateStr=2024-07-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766110484916, onlineIssueDateStr=2025-12-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766110484916, creator=13701087609, updateTime=1766110484916, updator=13701087609, issue=Issue{id=1208718233222386276, tenantId=1146029695717560320, journalId=1189873562199433220, year='2024', volume='', issue='7', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766110483699, creator=13701087609, updateTime=1766110483699, updator=13701087609, preIssue=null, nextIssue=null, ext=null, issueFiles=null}, startPage=54, endPage=57, ext={EN=ArticleExt(id=1208718238737887740, articleId=1208718238326845932, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Failure Analysis and Structural Optimization of A Radiator Bracket, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=

The radiator bracket of a vehicle fractured and failed during a vehicle road test. To find the causes of fracture failure, macroscopic inspection, fracture morphology analysis are performed, and numerical simulation method is adopted to perform simulation analysis, and it is found that the irrational structure design leaded to excessive stress in some areas exceeding the yield limit. Then, according to the simulation results, optimization measures are proposed for stress concentration area. After structural optimization, the optimized bracket structure is obtained. The optimized structural strength simulation shows that the maximum regional stress level of the bracket structure is 375 MPa under the maximum load, which is lower than the yield strength of the material (450 MPa), meeting the strength performance requirements.

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某车型在实车试验过程中散热器支架出现断裂失效现象。通过宏观检查和断口形貌分析了散热器支架的断裂失效原因，并采用数值模拟方法仿真分析，发现原因是结构设计不合理，导致部分区域应力过大，超过屈服极限。根据仿真分析结果，针对应力集中部位提出优化措施，经过结构优化，获得优化后的支架结构。优化结构强度模拟表明，在最大载荷下，支架结构区域应力水平最大为375 MPa，低于材料屈服强度（450 MPa），满足强度性能要求。

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赵星辰（1995—），男，硕士学位，研究方向为CAE技术。

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赵星辰（1995—），男，硕士学位，研究方向为CAE技术。

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材料	弹性模量/MPa	泊松比	密度/g·cm-3
大梁钢DL510	210 000	0.33	7.85

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材料属性

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载荷工况	X方向	Y方向	Z方向
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载荷工况 N

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载荷工况	结构处最大 主应力	评价标准 （抗拉强度）	校核结果
工况1	1 110	450	不合格

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散热器支架的强度校核结果 MPa

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载荷工况	结构处最大 主应力	评价标准 （抗拉强度）	校核结果
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