Article(id=1194604063959523578, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1194604061094810310, articleNumber=null, orderNo=null, doi=10.20104/j.cnki.1674-6546.20250010, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=1738252800000, revisedDateStr=2025-01-31, acceptedDate=null, acceptedDateStr=null, onlineDate=1762745403518, onlineDateStr=2025-11-10, pubDate=1749916800000, pubDateStr=2025-06-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762745403518, onlineIssueDateStr=2025-11-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762745403518, creator=13701087609, updateTime=1762745403518, updator=13701087609, issue=Issue{id=1194604061094810310, tenantId=1146029695717560320, journalId=1189918454225211397, year='2025', volume='', issue='6', pageStart='1', pageEnd='48', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762745402821, creator=13701087609, updateTime=1762746663749, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1194609349818552989, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1194604061094810310, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1194609349818552990, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1194604061094810310, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1, endPage=8, ext={EN=ArticleExt(id=1194604064165044475, articleId=1194604063959523578, tenantId=1146029695717560320, journalId=1189918454225211397, language=EN, title=Prediction of Mechanical Properties of Bionic Gradient Circular Multi-Cell Thin-Walled Tubes Based on Machine Learning, columnId=1194604061958836937, journalTitle=Automotive Engineer, columnName=Special Topic on 2024 International Conference of Vehicle Safety and Intelligent Transportation, runingTitle=null, highlight=null, articleAbstract=
To rapidly and accurately predict the crashworthiness indicators of thin-walled tubes, a bionic gradient circular multi-cell thin-walled tube axial compression model for predicting the average collision force is established based on the Simplified Super Folding Element (SSFE) theory, and a Long Short-Term Memory (LSTM) network model is built to predict the crashworthiness indicators of the bionic gradient circular multi-cell thin-walled tube under different geometric parameters. The results show that the theoretical prediction error is less than 6% compared with the simulation results, indicating the reliability of the theoretical model. The LSTM network model exhibits an error of less than 2% for Energy Absorption (EA) and Initial Peak Force (IPF) on the validation set, and an error of less than 5% on the test set, demonstrating excellent prediction accuracy and generalization capability.
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*, columnId=1194604062134997707, journalTitle=汽车工程师, columnName=2024年车辆安全与智能交通国际学术会议专题, runingTitle=null, highlight=null, articleAbstract=为实现薄壁管耐撞性指标的快速准确预测,基于简化超折叠单元理论建立了一种仿生梯度圆形多胞(BGCM)薄壁管在轴向压缩条件下的平均碰撞力预测模型,并搭建了长短期记忆(LSTM)网络模型预测不同几何参数下BGCM薄壁管的耐撞性指标。结果表明:理论预测与仿真结果误差小于6%,理论模型具有可靠性;LSTM网络模型在验证集上对薄壁管的吸能量(EA)和初始峰值力(IPF)的预测误差小于2%,在测试集上的预测误差小于5%,具有优异的预测精度和泛化能力。, correspAuthors=null, authorNote=null, correspAuthorsNote=
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| 本构单元 | 数量 | 本构单元 | 数量 |
| 弧形单元Ⅰ | 48 | 弧形单元Ⅱ(β3) | 32 |
| 弧形单元Ⅱ(β1) | 16 | 圆形单元 | 40 |
| 弧形单元Ⅱ(β2) | 32 | | |
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BGCM薄壁管中不同角单元数量 个
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| 本构单元 | 数量 | 本构单元 | 数量 |
| 弧形单元Ⅰ | 48 | 弧形单元Ⅱ(β3) | 32 |
| 弧形单元Ⅱ(β1) | 16 | 圆形单元 | 40 |
| 弧形单元Ⅱ(β2) | 32 | | |
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| 参数 | FIP/kN | EA/kJ | Fm/kN | CFE/% |
| 试验结果 | 55.17 | 2.79 | 37.20 | 0.67 |
| 仿真结果 | 51.33 | 2.74 | 36.53 | 0.71 |
| 相对误差/% | -6.96 | -1.79 | -1.80 | 5.97 |
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试验结果[14]与仿真结果的耐撞性比较
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| 参数 | FIP/kN | EA/kJ | Fm/kN | CFE/% |
| 试验结果 | 55.17 | 2.79 | 37.20 | 0.67 |
| 仿真结果 | 51.33 | 2.74 | 36.53 | 0.71 |
| 相对误差/% | -6.96 | -1.79 | -1.80 | 5.97 |
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| r/mm | t1/mm | t2/mm | Fm/kN | 误差/% |
| 仿真 | 理论 |
| 5 | 0.5 | 0.5 | 102.17 | 97.84 | -4.23 |
| 5 | 0.6 | 0.6 | 121.67 | 128.63 | 5.72 |
| 5 | 0.7 | 0.7 | 159.67 | 162.09 | 1.52 |
| 6 | 0.5 | 0.5 | 109.25 | 103.87 | -4.92 |
| 6 | 0.6 | 0.6 | 141.83 | 136.54 | -3.73 |
| 6 | 0.7 | 0.7 | 174.33 | 172.06 | -1.31 |
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平均碰撞力理论预测结果与有限元仿真结果对比
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| r/mm | t1/mm | t2/mm | Fm/kN | 误差/% |
| 仿真 | 理论 |
| 5 | 0.5 | 0.5 | 102.17 | 97.84 | -4.23 |
| 5 | 0.6 | 0.6 | 121.67 | 128.63 | 5.72 |
| 5 | 0.7 | 0.7 | 159.67 | 162.09 | 1.52 |
| 6 | 0.5 | 0.5 | 109.25 | 103.87 | -4.92 |
| 6 | 0.6 | 0.6 | 141.83 | 136.54 | -3.73 |
| 6 | 0.7 | 0.7 | 174.33 | 172.06 | -1.31 |
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| 参数 | 取值 |
| LSTM层数量/层 | 2 |
| 每层隐藏单元数量/个 | 500 |
| 丢弃层数量/层 | 2 |
| 丢弃比例/% | 20 |
| 全连接层数量/层 | 2 |
| 优化器 | Adam |
| 学习率 | 0.001 |
| 损失函数 | 均方误差(MSE) |
数据集划分 比例/% | 训练集 | 80 |
| 验证集 | 10 |
| 测试集 | 10 |
| 训练批次/次 | 500 |
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LSTM神经网络模型网格参数
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| 参数 | 取值 |
| LSTM层数量/层 | 2 |
| 每层隐藏单元数量/个 | 500 |
| 丢弃层数量/层 | 2 |
| 丢弃比例/% | 20 |
| 全连接层数量/层 | 2 |
| 优化器 | Adam |
| 学习率 | 0.001 |
| 损失函数 | 均方误差(MSE) |
数据集划分 比例/% | 训练集 | 80 |
| 验证集 | 10 |
| 测试集 | 10 |
| 训练批次/次 | 500 |
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