Article(id=1243220386448523375, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, articleNumber=null, orderNo=null, doi=10.15959/j.cnki.0254-0053.2025.03.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747670400000, receivedDateStr=2025-05-20, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774336438046, onlineDateStr=2026-03-24, pubDate=1758729600000, pubDateStr=2025-09-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774336438046, onlineIssueDateStr=2026-03-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774336438046, creator=13701087609, updateTime=1774336438046, updator=13701087609, issue=Issue{id=1243220377556595432, tenantId=1146029695717560320, journalId=1242844143416819734, year='2025', volume='46', issue='3', pageStart='541', pageEnd='810', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774336435926, creator=13701087609, updateTime=1774336648182, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243221267898282005, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243221267898282006, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=735, endPage=748, ext={EN=ArticleExt(id=1243220387123806340, articleId=1243220386448523375, tenantId=1146029695717560320, journalId=1242844143416819734, language=EN, title=Sensitivity Analysis of Process Parameters in Split-Sleeve Cold Expansion of Holes, columnId=null, journalTitle=Chinese Quarterly of Mechanics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Split-sleeve cold expansion technology is a critical process for improving the fatigue life of aerospace structural components. However, the influence of its parameter variations on fatigue performance remains insufficiently studied. This paper systematically investigates the sensitivity of initial hole diameter, thickness of split-sleeve, and diameter of the extrusion zone of the mandrel on the fatigue life of 7050-T7451 aluminum alloy through integrated fatigue testing, finite element simulation, and machine learning methods. Based on the S-N curve model of 7050-T7451 aluminum alloy and the critical distance line method, a fatigue life prediction model for cold-expanded holes was established. The model was then used to generate datasets for training an intelligent fatigue life prediction model. Leveraging 400 000 data points obtained from the intelligent model, Sobol global sensitivity analysis was conducted to quantify the independent and interactive contributions of these parameters to fatigue life. Results indicate that the initial hole diameter has the most significant impact on fatigue life, dominating both independent effects and synergistic interactions, while the influence of Thickness of split-sleeve and mandrel diameter primarily manifests through interactive mechanisms. The study proposes prioritizing tolerance optimization for initial hole diameter while adopting collaborative design strategies for sleeve thickness and diameter of the extrusion zone of the mandrel. This methodology provides an efficient and economical approach for identifying critical process parameters and optimizing designs, demonstrating significant advantages over traditional physical experimentation and finite element analysis..
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开缝衬套孔冷挤压强化技术是提升航空结构件疲劳寿命的关键工艺,但其工艺参数的波动对疲劳性能的影响规律研究尚不充分.本文以7050-T7451铝合金为研究对象,结合疲劳试验、有限元仿真与机器学习方法,系统分析了初孔直径、开缝衬套厚度及芯棒挤压区直径对疲劳寿命影响的灵敏度.基于7050-T7451铝合金材料的S-N曲线模型,采用临界距离线法构建了孔冷挤压强化件的疲劳寿命预测模型,进而基于该模型分析得到的数据集训练出了疲劳寿命的智能预测模型.进一步基于智能预测模型获得的40万个数据,采用Sobol全局灵敏度分析方法得到了初孔直径、开缝衬套厚度及芯棒挤压区直径等参数对疲劳寿命影响的独立及交互作用贡献度.结果表明:初孔直径对疲劳寿命影响最为显著,其独立作用及协同效应均占主导;开缝衬套厚度与芯棒挤压区直径的影响主要通过交互作用体现.研究提出初孔直径需优先优化公差控制,而衬套厚度与芯棒直径可通过协同设计降低成本.该方法为主要工艺参数识别及优化设计提供了一种高效、经济的方法,相比传统开展物理试验或通过有限元仿真分析的方法,优势显著.
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, authorsList=谢舟, 袁国青)}, authors=[Author(id=1243220401325720051, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2230900@tongji.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1243220401564795387, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, authorId=1243220401325720051, language=EN, stringName=Zhou XIE, firstName=Zhou, middleName=null, lastName=XIE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1243220401669652992, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, authorId=1243220401325720051, language=CN, stringName=谢舟, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=同济大学 航空航天与力学学院,上海 200092, bio={"content":"
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谢舟,硕士生.研究方向:飞行器复合材料与结构制造.E-mail:2230900@tongji.edu.cn
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Schematic diagram of split-sleeve cold-expansion process of holes, figureFileSmall=zEHP9EQtZcsKFzBJaR5Hbw==, figureFileBig=/WTlK2KSyXWudc4kYcYHkQ==, tableContent=null), ArticleFig(id=1243220404068794980, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图1, caption=
开缝衬套孔冷挤压加工原理图, figureFileSmall=zEHP9EQtZcsKFzBJaR5Hbw==, figureFileBig=/WTlK2KSyXWudc4kYcYHkQ==, tableContent=null), ArticleFig(id=1243220404312064626, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.2, caption=
Material-grade S-N curve graph, figureFileSmall=ZTip09WEB/sLAvClH6dkDQ==, figureFileBig=AbSeNyVdABFnG+apQojJeA==, tableContent=null), ArticleFig(id=1243220404442088055, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图2, caption=
材料级S-N曲线图, figureFileSmall=ZTip09WEB/sLAvClH6dkDQ==, figureFileBig=AbSeNyVdABFnG+apQojJeA==, tableContent=null), ArticleFig(id=1243220404597277305, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.3, caption=
Schematic diagram of the maximum principal stress and critical distance line method, figureFileSmall=iBHT9hTDWnlxcmbZjcNRHA==, figureFileBig=5ogY2u9EJvkXYEribdS7Vg==, tableContent=null), ArticleFig(id=1243220404689552000, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图3, caption=
带孔疲劳试验件示意图, figureFileSmall=iBHT9hTDWnlxcmbZjcNRHA==, figureFileBig=5ogY2u9EJvkXYEribdS7Vg==, tableContent=null), ArticleFig(id=1243220404874101390, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.4, caption=
Schematic diagram of the maximum principal stress and critical distance line method, figureFileSmall=ghA1na8Ka04qemhi53+TFw==, figureFileBig=7ve2EplWJ1G8dM4GwTUAdA==, tableContent=null), ArticleFig(id=1243220404966376088, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图4, caption=
最大主应力和临界距离线法示意图, figureFileSmall=ghA1na8Ka04qemhi53+TFw==, figureFileBig=7ve2EplWJ1G8dM4GwTUAdA==, tableContent=null), ArticleFig(id=1243220405092205218, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.5, caption=
Graph of the relationship between the maximum principal stress at the danger point and the critical distance, figureFileSmall=AQ/VuNj5gGeKBaUiyIvhUg==, figureFileBig=rTp/Q7KRhbkhv39nMc/LoQ==, tableContent=null), ArticleFig(id=1243220405297726124, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图5, caption=
危险点最大主应力和临界距离关系图, figureFileSmall=AQ/VuNj5gGeKBaUiyIvhUg==, figureFileBig=rTp/Q7KRhbkhv39nMc/LoQ==, tableContent=null), ArticleFig(id=1243220405406778033, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.6, caption=
Comparative plot of test set results for GPR models, figureFileSmall=BFN9b2kRNHLczPhbh6y3/A==, figureFileBig=l7Mb5m1IgjzmSEjSeHOWWA==, tableContent=null), ArticleFig(id=1243220405603910332, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图6, caption=
GPR模型测试集结果对比图, figureFileSmall=BFN9b2kRNHLczPhbh6y3/A==, figureFileBig=l7Mb5m1IgjzmSEjSeHOWWA==, tableContent=null), ArticleFig(id=1243220405746516678, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.7, caption=
Histogram of Sobol sensitivity analysis results, figureFileSmall=n7BvY06FYRmxshOwG65kUA==, figureFileBig=SSs6Zb4M9Gaxb40ae4GZKw==, tableContent=null), ArticleFig(id=1243220406010757842, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图7, caption=
Sobol灵敏度分析结果直方图, figureFileSmall=n7BvY06FYRmxshOwG65kUA==, figureFileBig=SSs6Zb4M9Gaxb40ae4GZKw==, tableContent=null), ArticleFig(id=1243220406161752795, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Fig.8, caption=
Graph of the coefficient of variation of fatigue life, figureFileSmall=rRVVlKSkuzmKx7L1RB4pWg==, figureFileBig=TnTZedlMbCoEhekCF4soqA==, tableContent=null), ArticleFig(id=1243220406258221797, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=图8, caption=
疲劳寿命变异系数变化图, figureFileSmall=rRVVlKSkuzmKx7L1RB4pWg==, figureFileBig=TnTZedlMbCoEhekCF4soqA==, tableContent=null), ArticleFig(id=1243220406358885098, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Tab.1, caption=
Sample parameter table
, figureFileSmall=null, figureFileBig=null, tableContent=
| Model | Initial hole diameter/mm | Final hole diameter/mm | Thickness of split-sleeve/mm | The diameter of the extrusion zone of the mandrel/mm | Squeezing rate/% |
|---|
| Small hole sample | 3.683 | 3.969 | 0.152 | 3.556 | 4.8 |
| Large hole sample | 5.753 | 5.953 | 0.152 | 3.556 | 3.74 |
), ArticleFig(id=1243220406446965487, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=表1, caption=
试样参数表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Model | Initial hole diameter/mm | Final hole diameter/mm | Thickness of split-sleeve/mm | The diameter of the extrusion zone of the mandrel/mm | Squeezing rate/% |
|---|
| Small hole sample | 3.683 | 3.969 | 0.152 | 3.556 | 4.8 |
| Large hole sample | 5.753 | 5.953 | 0.152 | 3.556 | 3.74 |
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Statistical table of sampling parameters using the LHS method
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| Number | d[1] /mm | t[2] /mm | dm[3] /mm | e[4] | Number | d/mm | t/mm | dm/mm | e |
|---|
| 1 | 3.668 | 0.145 | 3.549 | 4.66% | 26 | 3.682 | 0.159 | 3.554 | 5.16% |
| 2 | 3.677 | 0.155 | 3.541 | 4.73% | 27 | 3.687 | 0.146 | 3.543 | 4.01% |
| 3 | 3.668 | 0.156 | 3.545 | 5.15% | 28 | 3.699 | 0.152 | 3.552 | 4.24% |
| 4 | 3.664 | 0.157 | 3.542 | 5.24% | 29 | 3.659 | 0.159 | 3.544 | 5.55% |
| 5 | 3.667 | 0.153 | 3.542 | 4.94% | 30 | 3.674 | 0.158 | 3.543 | 5.04% |
| 6 | 3.685 | 0.147 | 3.556 | 4.48% | 31 | 3.698 | 0.158 | 3.543 | 4.35% |
| 7 | 3.670 | 0.150 | 3.545 | 4.77% | 32 | 3.706 | 0.150 | 3.553 | 3.97% |
| 8 | 3.680 | 0.152 | 3.553 | 4.81% | 33 | 3.691 | 0.148 | 3.551 | 4.23% |
| 9 | 3.689 | 0.157 | 3.544 | 4.58% | 34 | 3.692 | 0.157 | 3.549 | 4.63% |
| 10 | 3.697 | 0.155 | 3.551 | 4.44% | 35 | 3.665 | 0.159 | 3.546 | 5.43% |
| 11 | 3.661 | 0.152 | 3.552 | 5.33% | 36 | 3.684 | 0.155 | 3.554 | 4.89% |
| 12 | 3.703 | 0.160 | 3.550 | 4.51% | 37 | 3.692 | 0.155 | 3.547 | 4.47% |
| 13 | 3.696 | 0.156 | 3.548 | 4.44% | 38 | 3.674 | 0.150 | 3.553 | 4.87% |
| 14 | 3.662 | 0.149 | 3.547 | 5.00% | 39 | 3.676 | 0.158 | 3.548 | 5.11% |
| 15 | 3.705 | 0.146 | 3.546 | 3.59% | 40 | 3.683 | 0.149 | 3.546 | 4.37% |
| 16 | 3.707 | 0.147 | 3.555 | 3.83% | 41 | 3.659 | 0.152 | 3.548 | 5.27% |
| 17 | 3.661 | 0.150 | 3.554 | 5.27% | 42 | 3.678 | 0.153 | 3.545 | 4.70% |
| 18 | 3.676 | 0.148 | 3.556 | 4.79% | 43 | 3.672 | 0.154 | 3.552 | 5.12% |
| 19 | 3.704 | 0.149 | 3.542 | 3.67% | 44 | 3.679 | 0.149 | 3.548 | 4.54% |
| 20 | 3.700 | 0.151 | 3.551 | 4.14% | 45 | 3.666 | 0.146 | 3.544 | 4.64% |
| 21 | 3.670 | 0.148 | 3.555 | 4.93% | 46 | 3.705 | 0.157 | 3.554 | 4.40% |
| 22 | 3.671 | 0.159 | 3.544 | 5.20% | 47 | 3.693 | 0.151 | 3.547 | 4.22% |
| 23 | 3.683 | 0.145 | 3.542 | 4.05% | 48 | 3.696 | 0.156 | 3.549 | 4.46% |
| 24 | 3.688 | 0.154 | 3.551 | 4.64% | 49 | 3.701 | 0.147 | 3.555 | 4.00% |
| 25 | 3.694 | 0.153 | 3.550 | 4.39% | 50 | 3.688 | 0.154 | 3.550 | 4.61% |
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采用拉丁超立方采样法的采样参数统计表
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| Number | d[1] /mm | t[2] /mm | dm[3] /mm | e[4] | Number | d/mm | t/mm | dm/mm | e |
|---|
| 1 | 3.668 | 0.145 | 3.549 | 4.66% | 26 | 3.682 | 0.159 | 3.554 | 5.16% |
| 2 | 3.677 | 0.155 | 3.541 | 4.73% | 27 | 3.687 | 0.146 | 3.543 | 4.01% |
| 3 | 3.668 | 0.156 | 3.545 | 5.15% | 28 | 3.699 | 0.152 | 3.552 | 4.24% |
| 4 | 3.664 | 0.157 | 3.542 | 5.24% | 29 | 3.659 | 0.159 | 3.544 | 5.55% |
| 5 | 3.667 | 0.153 | 3.542 | 4.94% | 30 | 3.674 | 0.158 | 3.543 | 5.04% |
| 6 | 3.685 | 0.147 | 3.556 | 4.48% | 31 | 3.698 | 0.158 | 3.543 | 4.35% |
| 7 | 3.670 | 0.150 | 3.545 | 4.77% | 32 | 3.706 | 0.150 | 3.553 | 3.97% |
| 8 | 3.680 | 0.152 | 3.553 | 4.81% | 33 | 3.691 | 0.148 | 3.551 | 4.23% |
| 9 | 3.689 | 0.157 | 3.544 | 4.58% | 34 | 3.692 | 0.157 | 3.549 | 4.63% |
| 10 | 3.697 | 0.155 | 3.551 | 4.44% | 35 | 3.665 | 0.159 | 3.546 | 5.43% |
| 11 | 3.661 | 0.152 | 3.552 | 5.33% | 36 | 3.684 | 0.155 | 3.554 | 4.89% |
| 12 | 3.703 | 0.160 | 3.550 | 4.51% | 37 | 3.692 | 0.155 | 3.547 | 4.47% |
| 13 | 3.696 | 0.156 | 3.548 | 4.44% | 38 | 3.674 | 0.150 | 3.553 | 4.87% |
| 14 | 3.662 | 0.149 | 3.547 | 5.00% | 39 | 3.676 | 0.158 | 3.548 | 5.11% |
| 15 | 3.705 | 0.146 | 3.546 | 3.59% | 40 | 3.683 | 0.149 | 3.546 | 4.37% |
| 16 | 3.707 | 0.147 | 3.555 | 3.83% | 41 | 3.659 | 0.152 | 3.548 | 5.27% |
| 17 | 3.661 | 0.150 | 3.554 | 5.27% | 42 | 3.678 | 0.153 | 3.545 | 4.70% |
| 18 | 3.676 | 0.148 | 3.556 | 4.79% | 43 | 3.672 | 0.154 | 3.552 | 5.12% |
| 19 | 3.704 | 0.149 | 3.542 | 3.67% | 44 | 3.679 | 0.149 | 3.548 | 4.54% |
| 20 | 3.700 | 0.151 | 3.551 | 4.14% | 45 | 3.666 | 0.146 | 3.544 | 4.64% |
| 21 | 3.670 | 0.148 | 3.555 | 4.93% | 46 | 3.705 | 0.157 | 3.554 | 4.40% |
| 22 | 3.671 | 0.159 | 3.544 | 5.20% | 47 | 3.693 | 0.151 | 3.547 | 4.22% |
| 23 | 3.683 | 0.145 | 3.542 | 4.05% | 48 | 3.696 | 0.156 | 3.549 | 4.46% |
| 24 | 3.688 | 0.154 | 3.551 | 4.64% | 49 | 3.701 | 0.147 | 3.555 | 4.00% |
| 25 | 3.694 | 0.153 | 3.550 | 4.39% | 50 | 3.688 | 0.154 | 3.550 | 4.61% |
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Statistical table of sampling results using the LHS method
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| Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle |
|---|
| 1 | 46 413 | 11 | 45 291 | 21 | 47 703 | 31 | 52 415 | 41 | 45 798 |
| 2 | 52 084 | 12 | 52 467 | 22 | 45 738 | 32 | 51 295 | 42 | 51 924 |
| 3 | 46 298 | 13 | 52 628 | 23 | 51 606 | 33 | 51 919 | 43 | 46 481 |
| 4 | 46 404 | 14 | 47 806 | 24 | 52 902 | 34 | 52 703 | 44 | 52 575 |
| 5 | 48 237 | 15 | 49 138 | 25 | 53 051 | 35 | 45 252 | 45 | 52 514 |
| 6 | 52 608 | 16 | 50 411 | 26 | 46 390 | 36 | 48 125 | 46 | 52 439 |
| 7 | 49 402 | 17 | 45 773 | 27 | 51 017 | 37 | 52 921 | 47 | 51 956 |
| 8 | 49 412 | 18 | 52 299 | 28 | 52 479 | 38 | 48 729 | 48 | 52 898 |
| 9 | 52 434 | 19 | 49 624 | 29 | 45 310 | 39 | 46 566 | 49 | 51 061 |
| 10 | 52 679 | 20 | 52 170 | 30 | 46 891 | 40 | 52 333 | 50 | 52 560 |
), ArticleFig(id=1243220407009002255, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=CN, label=表3, caption=
采用拉丁超立方采样法的采样结果统计表
, figureFileSmall=null, figureFileBig=null, tableContent=
| Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle | Number | Fatigue life/Cycle |
|---|
| 1 | 46 413 | 11 | 45 291 | 21 | 47 703 | 31 | 52 415 | 41 | 45 798 |
| 2 | 52 084 | 12 | 52 467 | 22 | 45 738 | 32 | 51 295 | 42 | 51 924 |
| 3 | 46 298 | 13 | 52 628 | 23 | 51 606 | 33 | 51 919 | 43 | 46 481 |
| 4 | 46 404 | 14 | 47 806 | 24 | 52 902 | 34 | 52 703 | 44 | 52 575 |
| 5 | 48 237 | 15 | 49 138 | 25 | 53 051 | 35 | 45 252 | 45 | 52 514 |
| 6 | 52 608 | 16 | 50 411 | 26 | 46 390 | 36 | 48 125 | 46 | 52 439 |
| 7 | 49 402 | 17 | 45 773 | 27 | 51 017 | 37 | 52 921 | 47 | 51 956 |
| 8 | 49 412 | 18 | 52 299 | 28 | 52 479 | 38 | 48 729 | 48 | 52 898 |
| 9 | 52 434 | 19 | 49 624 | 29 | 45 310 | 39 | 46 566 | 49 | 51 061 |
| 10 | 52 679 | 20 | 52 170 | 30 | 46 891 | 40 | 52 333 | 50 | 52 560 |
), ArticleFig(id=1243220407105471255, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220386448523375, language=EN, label=Tab.4, caption=
Statistical table of sobol sensitivity analysis results
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| Error type | Initial hole diameter | Thickness of split-sleeve | Diameter of the extrusion zone of the mandrel |
|---|
| Sensitivity type | Si[1] | [2] | Si |  | Si |  |
| Uniform distribution | 0.602 | 0.916 | 0.011 | 0.322 | 0.064 | 0.181 |
| Normal distribution | 0.688 | 0.853 | 0.071 | 0.184 | 0.074 | 0.099 |
| Lognormal distribution | 0.686 | 0.851 | 0.072 | 0.186 | 0.074 | 0.098 |
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Sobol灵敏度分析结果统计表
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| Error type | Initial hole diameter | Thickness of split-sleeve | Diameter of the extrusion zone of the mandrel |
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| Sensitivity type | Si[1] | [2] | Si |  | Si |  |
| Uniform distribution | 0.602 | 0.916 | 0.011 | 0.322 | 0.064 | 0.181 |
| Normal distribution | 0.688 | 0.853 | 0.071 | 0.184 | 0.074 | 0.099 |
| Lognormal distribution | 0.686 | 0.851 | 0.072 | 0.186 | 0.074 | 0.098 |
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