Article(id=1195319923816829104, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195319920000012443, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20240188, 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=1762916077807, onlineDateStr=2025-11-12, pubDate=1739980800000, pubDateStr=2025-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762916077807, onlineIssueDateStr=2025-11-12, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762916077807, creator=13701087609, updateTime=1762916077807, updator=13701087609, issue=Issue{id=1195319920000012443, tenantId=1146029695717560320, journalId=1189873562199433220, year='2025', volume='', issue='2', 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=1762916076894, creator=13701087609, updateTime=1762916415896, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1195321341915205752, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195319920000012443, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1195321341915205753, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195319920000012443, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=34, endPage=41, ext={EN=ArticleExt(id=1195319924018155698, articleId=1195319923816829104, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Lightweight Design of Aluminum Alloy Power Battery Bracket Based on Level Set Method, columnId=1190284220686766583, journalTitle=Automobile Technology & Material, columnName=Original article, runingTitle=null, highlight=null, articleAbstract=
With the aluminum bracket of a new energy vehicle power battery as the research object, the level set method is employed to perform topological optimization on the power battery bracket. During the optimization process, factors such as structural stiffness, strength, fatigue, and dynamic safety are comprehensively considered. The optimization results are interpreted and the structure is reshaped to obtain a new structure that meets the requirements. The reshaped structure undergoes sensitivity analysis to identify sections requiring optimization. Through topology optimization, a reasonable cross-sectional shape is obtained, and the optimized structure is verified to ensure performance enhancement. Upon comparison, the optimized power battery bracket exhibits a 5.9 Hz increase in first-order modal compared to the original structure, with an overall stiffness improvement of 18.2%. The results for stiffness, strength, and random vibration are superior to the original structure. Fatigue analysis indicates that the damage to the new structure is less than 1, indicating its superiority over the original structure. Additionally, the weight of the optimized battery bracket is reduced from 209 kg to 180 kg, representing a weight reduction ratio of 13.8%.
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以某款新能源汽车动力电池铝托架为研究对象,采用水平集法对动力电池托架进行拓扑优化。优化过程综合考虑结构的刚度、强度、疲劳和动态安全等,对优化结果进行解读和结构重塑,获取满足需求的新结构。对重塑后的新结构进行灵敏度分析,获取需要优化的截面,通过拓扑优化获得合理截面形状,对优化后的结构进行校核以确保性能提升。经对比,优化后的动力电池托架较原结构一阶模态频率提高5.9 Hz,整体刚度提升18.2%;刚、强度和随机振动结果优于原结构;疲劳分析结果表明,新结构损伤小于1且优于原结构。优化后的电池托架质量由209 kg降低到180 kg,质量减轻13.8%。
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李建(1991—),男,工程师,硕士学位,研究方向为汽车轻量化及结构优化。
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1 Weiqiao Guoke (Binzhou) Science and Engineering Industry Technology Research Institute Co., Ltd., Binzhou 256600
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| 负载点 | 冲击工况 | 转弯工况 | 起停工况 |
| 1 | 10.3 | 1.6 | 2.5 |
| 2 | 8.6 | 2.3 | 2.2 |
| 3 | 16.4 | 4 | 3.1 |
| 4 | 1.8 | 0.7 | 0.7 |
| 5 | 7.3 | 2.2 | 1.8 |
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基础动力电池托架刚度指标(各负载点位移) mm
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| 负载点 | 冲击工况 | 转弯工况 | 起停工况 |
| 1 | 10.3 | 1.6 | 2.5 |
| 2 | 8.6 | 2.3 | 2.2 |
| 3 | 16.4 | 4 | 3.1 |
| 4 | 1.8 | 0.7 | 0.7 |
| 5 | 7.3 | 2.2 | 1.8 |
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| 频率/Hz | X向 功率谱密度 /g2·Hz-1 | 频率/Hz | Y向 功率谱密度 /g2·Hz-1 | 频率/Hz | Z向 功率谱密度 /g2·Hz-1 |
| 5 | 0.008 | 5 | 0.005 | 5 | 0.002 |
| 10 | 0.042 | 10 | 0.025 | 10 | 0.018 |
| 15 | 0.042 | 15 | 0.025 | 15 | 0.018 |
| 40 | 0.000 5 | 60 | 0.000 1 | 200 | 0.000 01 |
| 100 | 0.000 5 | 100 | 0.000 1 | | |
| 200 | 0.000 01 | 200 | 0.000 01 | | |
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功率谱密度
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| 频率/Hz | X向 功率谱密度 /g2·Hz-1 | 频率/Hz | Y向 功率谱密度 /g2·Hz-1 | 频率/Hz | Z向 功率谱密度 /g2·Hz-1 |
| 5 | 0.008 | 5 | 0.005 | 5 | 0.002 |
| 10 | 0.042 | 10 | 0.025 | 10 | 0.018 |
| 15 | 0.042 | 15 | 0.025 | 15 | 0.018 |
| 40 | 0.000 5 | 60 | 0.000 1 | 200 | 0.000 01 |
| 100 | 0.000 5 | 100 | 0.000 1 | | |
| 200 | 0.000 01 | 200 | 0.000 01 | | |
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| 负载点 | 冲击工况 | 转弯工况 | 起停工况 |
| 1 | 8.18 | 1.25 | 2.11 |
| 2 | 6.98 | 1.97 | 1.92 |
| 3 | 13.12 | 3.33 | 2.58 |
| 4 | 1.71 | 0.67 | 0.69 |
| 5 | 6.49 | 2.06 | 1.66 |
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| 负载点 | 冲击工况 | 转弯工况 | 起停工况 |
| 1 | 8.18 | 1.25 | 2.11 |
| 2 | 6.98 | 1.97 | 1.92 |
| 3 | 13.12 | 3.33 | 2.58 |
| 4 | 1.71 | 0.67 | 0.69 |
| 5 | 6.49 | 2.06 | 1.66 |
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