Article(id=1172525475827167706, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, articleNumber=null, orderNo=null, doi=10.3969/j.issn.2095‒1469.2025.04.17, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716134400000, receivedDateStr=2024-05-20, revisedDate=1719417600000, revisedDateStr=2024-06-27, acceptedDate=null, acceptedDateStr=null, onlineDate=1757481457906, onlineDateStr=2025-09-10, pubDate=1752940800000, pubDateStr=2025-07-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757481457906, onlineIssueDateStr=2025-09-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757481457906, creator=13701087609, updateTime=1757481457906, updator=13701087609, issue=Issue{id=1172525471628673796, tenantId=1146029695717560320, journalId=1152916057816748034, year='2025', volume='15', issue='4', pageStart='427', pageEnd='619', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1757481456904, creator=13701087609, updateTime=1757489711911, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172560095704662894, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172560095704662895, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=611, endPage=619, ext={EN=ArticleExt(id=1172525476103991771, articleId=1172525475827167706, tenantId=1146029695717560320, journalId=1152916057816748034, language=EN, title=Stability Analysis of Acoustic Materials Sound Absorption and Insulation Based on Evidence Theory, columnId=1153756966938731297, journalTitle=Chinese Journal of Automotive Engineering, columnName=Other Technologies, runingTitle=null, highlight=null, articleAbstract=
The strong uncertainty of acoustic material parameters leads to the poor stability of its sound absorption and insulation performance. In this paper, a method based on evidence theory is proposed to analyze the stability of acoustic materials. The uncertainty of acoustic material parameters is described by evidence theory, and the focal element interval and the basic confidence assignment of each parameter are determined. Using the interval perturbation method, the upper and lower bounds of sound absorption and insulation performance corresponding to all focal element interval combinations are calculated. The reliability and plausibility of uncertainty problems are calculated according to the identification framework. Reliability and plausibility are taken as optimization objectives, and particle swarm optimization is used to improve the stability of acoustic material's sound absorption and insulation performance. Taking an inner front wall as an example, the stability analysis and optimization of the acoustic insulation performance of the acoustic material were carried out. After optimization, the quality of the part was reduced by 18%, and the stability of the acoustic insulation performance was greatly improved in the whole frequency band, especially in the middle and low frequency band.
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声学材料参数存在较强的不确定性,导致其吸隔声性能的稳定性较差。提出一种基于证据理论的声学材料吸隔声性能稳定性分析方法。采用证据理论对声学材料参数的不确定性进行描述,确定每个参数的焦元区间及基本可信度分配;使用区间摄动方法计算所有焦元区间组合对应的吸隔声性能上下界;根据辨识框架计算不确定性问题的可信度和似真度;以可信度、似真度作为优化目标,使用粒子群算法进行优化,提升声学材料吸隔声性能的稳定性。以某汽车声学包内前围为例进行了声学材料隔声性能稳定性分析和优化。优化后,零件的质量降低了18%,同时隔声性能的稳定性在全频段内大幅度提升,在中、低频段尤为明显。
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某内前围插入损失可信度及似真度CDF曲线, figureFileSmall=XvD7ePPhBs2t4dpUdgzSqg==, figureFileBig=JzdT4sdo/KEFTFpRrAxTDg==, tableContent=null), ArticleFig(id=1175522297642369950, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=EN, label=null, caption=null, figureFileSmall=llYwHmfjKAUZnNRx8eR2vA==, figureFileBig=pyfxjfB9+KQr6vEUiPyTXw==, tableContent=null), ArticleFig(id=1175522297701090207, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=CN, label=图5, caption=
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优化前后插入损失可信度及似真度CDF曲线对比, figureFileSmall=COHanNhARma5aqGbTlJ2Sg==, figureFileBig=/pDUDqRbi8sK9Q/yBP4KHg==, tableContent=null), ArticleFig(id=1175522297940165538, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 中心值 |
| EVA材料 | 厚度/mm | 2 |
| 密度/(kg/m3) | 1 500 |
| PU发泡材料 | 厚度/mm | 23 |
| 密度/(kg/m3) | 25 |
| 泊松比 | 0.38 |
| 弹性模量/Pa | 55 000 |
| 流阻/(Nm/s-4) | 5 600 |
| 孔隙率 | 0.97 |
| 曲折因子 | 1.28 |
| 黏性特征长度/m | 0.000 12 |
| 热特征长度/m | 0.000 35 |
), ArticleFig(id=1175522297990497187, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=CN, label=表1, caption=
内前围材料参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 中心值 |
| EVA材料 | 厚度/mm | 2 |
| 密度/(kg/m3) | 1 500 |
| PU发泡材料 | 厚度/mm | 23 |
| 密度/(kg/m3) | 25 |
| 泊松比 | 0.38 |
| 弹性模量/Pa | 55 000 |
| 流阻/(Nm/s-4) | 5 600 |
| 孔隙率 | 0.97 |
| 曲折因子 | 1.28 |
| 黏性特征长度/m | 0.000 12 |
| 热特征长度/m | 0.000 35 |
), ArticleFig(id=1175522298040828836, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 焦元区间 | BPA |
| EVA材料 | 厚度/ mm | [1.9,2.0] | 0.5 |
| [2.0,2.1] | 0.5 |
| 密度/(kg/m3) | [14 001,500] | 0.5 |
| [15 001,600] | 0.5 |
| PU发泡材料 | 厚度/mm | [20,22] | 0.158 5 |
| [22,24] | 0.683 0 |
| [24,26] | 0.158 5 |
| 密度/(kg/m3) | [23,25] | 0.5 |
| [25,27] | 0.5 |
| 弹性模量/Pa | [50 000, 520 000] | 0.158 5 |
| [520 000, 550 000] | 0.683 0 |
| [550 000, 600 000] | 0.158 5 |
| 流阻/(Nm/s-4) | [50 005,400] | 0.2 |
| [5 400,5 800] | 0.6 |
| [5 800,6 200] | 0.2 |
| 孔隙率 | [0.95,0.97] | 0.4 |
| [0.97,0.98] | 0.6 |
| 曲折因子 | [1.25,1.28] | 0.5 |
| [1.28,1.31] | 0.5 |
), ArticleFig(id=1175522298107937701, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=CN, label=表2, caption=
不确定性变量的基本可信度分配
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| 参数 | 焦元区间 | BPA |
| EVA材料 | 厚度/ mm | [1.9,2.0] | 0.5 |
| [2.0,2.1] | 0.5 |
| 密度/(kg/m3) | [14 001,500] | 0.5 |
| [15 001,600] | 0.5 |
| PU发泡材料 | 厚度/mm | [20,22] | 0.158 5 |
| [22,24] | 0.683 0 |
| [24,26] | 0.158 5 |
| 密度/(kg/m3) | [23,25] | 0.5 |
| [25,27] | 0.5 |
| 弹性模量/Pa | [50 000, 520 000] | 0.158 5 |
| [520 000, 550 000] | 0.683 0 |
| [550 000, 600 000] | 0.158 5 |
| 流阻/(Nm/s-4) | [50 005,400] | 0.2 |
| [5 400,5 800] | 0.6 |
| [5 800,6 200] | 0.2 |
| 孔隙率 | [0.95,0.97] | 0.4 |
| [0.97,0.98] | 0.6 |
| 曲折因子 | [1.25,1.28] | 0.5 |
| [1.28,1.31] | 0.5 |
), ArticleFig(id=1175522298187629478, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 优化前 | 优化后 |
| EVA材料 | 厚度/mm | 2 | 1.8 |
| 密度/(kg/m3) | 1 500 | 1 600 |
| PU发泡材料 | 厚度/mm | 23 | 25 |
| 密度/(kg/m3) | 25 | 18 |
| 流阻/(Nm/s-4) | 5 600 | 6 418 |
| 弹性模量/Pa | 55 000 | 52 458 |
| 曲折因子 | 1.28 | 1.11 |
| 零件单位面积质量/(kg/m2) | 3.575 | 2.925 |
), ArticleFig(id=1175522298296681383, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475827167706, language=CN, label=表3, caption=
优化前后内前围材料参数和质量变换
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 优化前 | 优化后 |
| EVA材料 | 厚度/mm | 2 | 1.8 |
| 密度/(kg/m3) | 1 500 | 1 600 |
| PU发泡材料 | 厚度/mm | 23 | 25 |
| 密度/(kg/m3) | 25 | 18 |
| 流阻/(Nm/s-4) | 5 600 | 6 418 |
| 弹性模量/Pa | 55 000 | 52 458 |
| 曲折因子 | 1.28 | 1.11 |
| 零件单位面积质量/(kg/m2) | 3.575 | 2.925 |
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