Article(id=1154021843729113182, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, articleNumber=null, orderNo=null, doi=10.19562/j.chinasae.qcgc.2024.11.016, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1714060800000, receivedDateStr=2024-04-26, revisedDate=1716912000000, revisedDateStr=2024-05-29, acceptedDate=null, acceptedDateStr=null, onlineDate=1753069848234, onlineDateStr=2025-07-21, pubDate=1732464000000, pubDateStr=2024-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753069848234, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753069848234, creator=13701087609, updateTime=1753069848234, updator=13701087609, issue=Issue{id=1154021839199260977, tenantId=1146029695717560320, journalId=1146120084050784272, year='2024', volume='46', issue='11', pageStart='1937', pageEnd='2141', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=0, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753069847153, creator=13701087609, updateTime=1753074308668, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1154040552191418639, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1154040552191418640, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2100, endPage=2109, ext={EN=ArticleExt(id=1154021844110794847, articleId=1154021843729113182, tenantId=1146029695717560320, journalId=1146120084050784272, language=EN, title=Extrapolation of Load Spectrum Based on KANN-DBSCAN Bandwidth Optimization Kernel Density Estimation, columnId=1149809889280750125, journalTitle=Automotive Engineering, columnName=Selected Papers, runingTitle=null, highlight=null, articleAbstract=
Considering the limitation of global fixed bandwidth of load extrapolation for kernel density estimation,a load extrapolation method based on K-Average Nearest Neighbor Density-Based Spatial Clustering of Applications with Noise (KANN-DBSCAN) kernel density estimation (KDE) is proposed. The load data is grouped and clustered using the KANN-DBSCAN clustering algorithm,and the Rule-of-thumb (ROT) method is used to obtain the optimal bandwidth between different clusters. Then the kernel density estimation is conducted,and finally extrapolation is carried out using Monte Carlo simulation. The extrapolation rationality is verified using the measured load data of a certain electric vehicle on user road as the application object. The extrapolation effect is assessed by the three indicators of statistical parameter quantity,goodness of fit,and pseudo-damage. The results show that compared with the traditional fixed bandwidth kernel density estimation extrapolation method,the extrapolation load obtained by the DBSCSN kernel density estimation extrapolation method is closer to the actual load in statistical parameters,and the error of the mean,standard deviation,and maximum value is only 1.9%,4.3%,and 1.9%,respectively. The magnitude cumulative frequency curve fits R 2 are all greater than 0.99,and the pseudo-damage is close to 1. The results show the effectiveness of the clustering method in kernel density estimation load extrapolation,which is helpful for compiling the load spectrum of electric vehicles on customer service road,and can provide reference for the load extrapolation of mechanical parts with similar load distribution characteristics.
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针对核密度估计载荷外推全局固定带宽的局限性,提出一种基于KANN-DBSCAN(K-average nearest neighbor density-based spatial clustering of applications with noise)改进带宽取值的核密度估计(kernel density estimation,KDE)载荷外推方法。通过KANN-DBSCAN聚类算法对载荷数据进行分组聚类,采用拇指法求得不同簇间的最优带宽,然后进行核密度估计,再采用蒙特卡洛模拟进行外推。以某电动汽车在用户道路的实测载荷数据为应用对象,对外推方法的合理性进行检验。从统计参数检验量、拟合度检验和伪损伤检验3个指标对外推效果进行评估。结果表明:相比固定带宽的核密度估计外推方法,基于KANN-DBSCSN核密度估计的外推方法获得的外推载荷在统计参数上与实测载荷更为接近,均值、标准差和最大值的误差分别仅为 1.9%、 4.3%和1.9%;幅值累计频次曲线拟合度 均大于 0.99,伪损伤均接近 1。结果验证了该聚类方法在核密度估计载荷外推的有效性,有助于编制汽车在用户道路上的载荷谱,为具有相似载荷分布特点的机械零部件载荷外推提供了参考。
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Compiling vehicle durability load spectrum based on customer usage correlation[J/OL]. Journal of Jilin University (Engineering and Technology Edition): 1-11[2023-11-15]., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1170312543319896310, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, xref=1., ext=[AuthorCompanyExt(id=1170312543324090615, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, companyId=1170312543319896310, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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预处理后轮心垂向载荷, figureFileSmall=s1hV40YafIlVGUZZ3sQmQQ==, figureFileBig=xis7tyN13yuNwsLClsElWQ==, tableContent=null), ArticleFig(id=1170312547484840245, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=RBJJpIVLbcs+lCGZp8faCQ==, figureFileBig=imjj+mjOqi2laW2lMo8c2w==, tableContent=null), ArticleFig(id=1170312547598086454, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图5, caption=
载荷循环均幅值频次分布图, figureFileSmall=RBJJpIVLbcs+lCGZp8faCQ==, figureFileBig=imjj+mjOqi2laW2lMo8c2w==, tableContent=null), ArticleFig(id=1170312547694555447, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=OV3UgnDErcerE1xHa3LmYQ==, figureFileBig=PIegpCLW+KORSYdPVfO/kQ==, tableContent=null), ArticleFig(id=1170312547774247224, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图6, caption=
载荷循环均幅值散点图, figureFileSmall=OV3UgnDErcerE1xHa3LmYQ==, figureFileBig=PIegpCLW+KORSYdPVfO/kQ==, tableContent=null), ArticleFig(id=1170312547879104825, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=ibiiSaM/QCxiDm1CCp+SDg==, figureFileBig=/WW8u/GnHkjn2OaPb3XTVw==, tableContent=null), ArticleFig(id=1170312547958796602, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图7, caption=
聚类载荷循环均幅值散点图, figureFileSmall=ibiiSaM/QCxiDm1CCp+SDg==, figureFileBig=/WW8u/GnHkjn2OaPb3XTVw==, tableContent=null), ArticleFig(id=1170312548030099771, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=RsDv2dkMUCZdGCRWBZmG+g==, figureFileBig=JOhG0rXbQangKFjyx1+KeQ==, tableContent=null), ArticleFig(id=1170312548097208636, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图8, caption=
验证载荷与外推载荷散点图, figureFileSmall=RsDv2dkMUCZdGCRWBZmG+g==, figureFileBig=JOhG0rXbQangKFjyx1+KeQ==, tableContent=null), ArticleFig(id=1170312548168511805, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=lKSx1lDGiM+jInu2iIwgBw==, figureFileBig=qQJg0/5N61rlMFA+hHfVdQ==, tableContent=null), ArticleFig(id=1170312548239814974, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图9, caption=
验证载荷与外推载荷数据的均幅值频次对比, figureFileSmall=lKSx1lDGiM+jInu2iIwgBw==, figureFileBig=qQJg0/5N61rlMFA+hHfVdQ==, tableContent=null), ArticleFig(id=1170312548306923839, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=9h/XZpQuZxvjLZOzfMX6Rg==, figureFileBig=l2FvrLbKzUkXtDc8bp6Z4Q==, tableContent=null), ArticleFig(id=1170312548445335872, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=图10, caption=
验证载荷与两种外推的载荷循环幅值累积频次曲线, figureFileSmall=9h/XZpQuZxvjLZOzfMX6Rg==, figureFileBig=l2FvrLbKzUkXtDc8bp6Z4Q==, tableContent=null), ArticleFig(id=1170312548499861825, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 簇 | 1 | 2 | 3 | 4 |
| | 53.965 | 110.629 | 226.040 | 3 543.289 |
| | 23 | 17 | 12 | 66 |
), ArticleFig(id=1170312548587942210, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=表1, caption=
聚类参数
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| 簇 | 1 | 2 | 3 | 4 |
| | 53.965 | 110.629 | 226.040 | 3 543.289 |
| | 23 | 17 | 12 | 66 |
), ArticleFig(id=1170312548646662467, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 簇 | 1 | 2 | 3 | 4 |
| hx /N | 30.331 | 71.994 | 212.819 | 666.650 |
| hy /N | 21.211 | 55.410 | 85.893 | 304.726 |
), ArticleFig(id=1170312548713771332, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=表2, caption=
聚类不同簇的带宽
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| 簇 | 1 | 2 | 3 | 4 |
| hx /N | 30.331 | 71.994 | 212.819 | 666.650 |
| hy /N | 21.211 | 55.410 | 85.893 | 304.726 |
), ArticleFig(id=1170312548910903621, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 样本 | 均值/kN | 标准差/kN | 最大值/kN |
| 验证载荷 | 本文方法 | 固定带宽 | 验证载荷 | 本文方法 | 固定带宽 | 验证载荷 | 本文方法 | 固定带宽 |
| 样本1 | 1.262 | 1.282 | 1.342 | 0.690 | 0.694 | 0.742 | 8.776 | 8.642 | 7.709 |
| 样本2 | 1.546 | 1.576 | 1.669 | 0.844 | 0.818 | 0.875 | 10.349 | 10.320 | 9.764 |
| 样本3 | 1.188 | 1.203 | 1.264 | 0.653 | 0.641 | 0.668 | 8.334 | 8.180 | 7.041 |
| 样本4 | 1.540 | 1.546 | 1.629 | 0.813 | 0.778 | 0.855 | 10.200 | 10.391 | 9.752 |
), ArticleFig(id=1170312549019955526, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=表3, caption=
不同样本载荷统计参数
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| 样本 | 均值/kN | 标准差/kN | 最大值/kN |
| 验证载荷 | 本文方法 | 固定带宽 | 验证载荷 | 本文方法 | 固定带宽 | 验证载荷 | 本文方法 | 固定带宽 |
| 样本1 | 1.262 | 1.282 | 1.342 | 0.690 | 0.694 | 0.742 | 8.776 | 8.642 | 7.709 |
| 样本2 | 1.546 | 1.576 | 1.669 | 0.844 | 0.818 | 0.875 | 10.349 | 10.320 | 9.764 |
| 样本3 | 1.188 | 1.203 | 1.264 | 0.653 | 0.641 | 0.668 | 8.334 | 8.180 | 7.041 |
| 样本4 | 1.540 | 1.546 | 1.629 | 0.813 | 0.778 | 0.855 | 10.200 | 10.391 | 9.752 |
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| 样本 | 均值误差/% | 标准差误差/% | 最大值误差/% |
| 本文方法 | 固定带宽 | 本文方法 | 固定带宽 | 本文方法 | 固定带宽 |
| 样本1 | 1.4 | 3.7 | 0.1 | 3.5 | 1.5 | 12.2 |
| 样本2 | 1.9 | 7.9 | 3.1 | 3.7 | 0.3 | 5.7 |
| 样本3 | 1.3 | 6.4 | 2.7 | 5.2 | 1.8 | 15.5 |
| 样本4 | 0.3 | 5.8 | 4.3 | 5.1 | 1.9 | 4.4 |
), ArticleFig(id=1170312549275808072, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=表4, caption=
不同样本载荷统计参数误差
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| 样本 | 均值误差/% | 标准差误差/% | 最大值误差/% |
| 本文方法 | 固定带宽 | 本文方法 | 固定带宽 | 本文方法 | 固定带宽 |
| 样本1 | 1.4 | 3.7 | 0.1 | 3.5 | 1.5 | 12.2 |
| 样本2 | 1.9 | 7.9 | 3.1 | 3.7 | 0.3 | 5.7 |
| 样本3 | 1.3 | 6.4 | 2.7 | 5.2 | 1.8 | 15.5 |
| 样本4 | 0.3 | 5.8 | 4.3 | 5.1 | 1.9 | 4.4 |
), ArticleFig(id=1170312549447774537, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 样本 | 固定带宽 | 本文方法 |
| 1 | 0.987 0 | 0.999 2 |
| 2 | 0.984 5 | 0.997 6 |
| 3 | 0.979 1 | 0.999 0 |
| 4 | 0.992 3 | 0.999 1 |
), ArticleFig(id=1170312549527466314, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=CN, label=表5, caption=
载荷循环幅值累积频次曲线的决定系数
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| 样本 | 固定带宽 | 本文方法 |
| 1 | 0.987 0 | 0.999 2 |
| 2 | 0.984 5 | 0.997 6 |
| 3 | 0.979 1 | 0.999 0 |
| 4 | 0.992 3 | 0.999 1 |
), ArticleFig(id=1170312549640712523, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021843729113182, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 样本序号 | 固定带宽 | 本文方法 |
| 1 | 1.117 | 1.021 |
| 2 | 1.127 | 1.030 |
| 3 | 1.122 | 1.013 |
| 4 | 1.123 | 1.031 |
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伪损伤比
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| 样本序号 | 固定带宽 | 本文方法 |
| 1 | 1.117 | 1.021 |
| 2 | 1.127 | 1.030 |
| 3 | 1.122 | 1.013 |
| 4 | 1.123 | 1.031 |
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| 外推倍数 | 固定带宽 | 本文方法 |
| 10 | 1.112 | 1.027 |
| 20 | 1.107 | 1.034 |
| 30 | 1.099 | 1.028 |
| 50 | 1.102 | 1.030 |
| 100 | 1.104 | 1.029 |
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样本1不同外推倍数下伪损伤比
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| 外推倍数 | 固定带宽 | 本文方法 |
| 10 | 1.112 | 1.027 |
| 20 | 1.107 | 1.034 |
| 30 | 1.099 | 1.028 |
| 50 | 1.102 | 1.030 |
| 100 | 1.104 | 1.029 |
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