A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis
Abstract This study examines the problem of inadequate dynamic stiffness at the connection points of car bodies. A method based on modal contribution analysis to assess whether the cause of inadequate dynamic stiffness is a common or unique problem is proposed. Taking the front engine compartment at...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-97026-y |
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| author | Feitan Peng Luteng Chen Junyi Ye Fuwu Yan |
| author_facet | Feitan Peng Luteng Chen Junyi Ye Fuwu Yan |
| author_sort | Feitan Peng |
| collection | DOAJ |
| description | Abstract This study examines the problem of inadequate dynamic stiffness at the connection points of car bodies. A method based on modal contribution analysis to assess whether the cause of inadequate dynamic stiffness is a common or unique problem is proposed. Taking the front engine compartment attachment point of a body-in-white as a case study, this research identifies common issues arising from overall modes within the low-frequency range (54/58/74 Hz). To address the problem of frequency mismatch due to different modal truncation frequencies, the left front mounting point of the upper control arm is taken as an example, where the dynamic stiffness at 120 Hz is 8324 N/mm. Through modal contribution analysis, it was identified that the 46 th order engine compartment breathing mode contributed the most, confirming this as a common issue. Common issues can be optimized through frequency avoidance, while unique issues can be optimized using Operational Deflection Shape (ODS) analysis. Early identification of whether an issue is common or unique can significantly enhance the efficiency of NVH (Noise, Vibration, and Harshness) optimization for the vehicle body. |
| format | Article |
| id | doaj-art-1024604d23974682bc6a04ee3fa154ec |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-1024604d23974682bc6a04ee3fa154ec2025-08-20T03:10:11ZengNature PortfolioScientific Reports2045-23222025-04-011511910.1038/s41598-025-97026-yA method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysisFeitan Peng0Luteng Chen1Junyi Ye2Fuwu Yan3SERES Automobile Co., LtdSERES Automobile Co., LtdSERES Automobile Co., LtdSERES Automobile Co., LtdAbstract This study examines the problem of inadequate dynamic stiffness at the connection points of car bodies. A method based on modal contribution analysis to assess whether the cause of inadequate dynamic stiffness is a common or unique problem is proposed. Taking the front engine compartment attachment point of a body-in-white as a case study, this research identifies common issues arising from overall modes within the low-frequency range (54/58/74 Hz). To address the problem of frequency mismatch due to different modal truncation frequencies, the left front mounting point of the upper control arm is taken as an example, where the dynamic stiffness at 120 Hz is 8324 N/mm. Through modal contribution analysis, it was identified that the 46 th order engine compartment breathing mode contributed the most, confirming this as a common issue. Common issues can be optimized through frequency avoidance, while unique issues can be optimized using Operational Deflection Shape (ODS) analysis. Early identification of whether an issue is common or unique can significantly enhance the efficiency of NVH (Noise, Vibration, and Harshness) optimization for the vehicle body.https://doi.org/10.1038/s41598-025-97026-yBody-in-whiteMinimum dynamic stiffnessModal contributionNVH performance |
| spellingShingle | Feitan Peng Luteng Chen Junyi Ye Fuwu Yan A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis Scientific Reports Body-in-white Minimum dynamic stiffness Modal contribution NVH performance |
| title | A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| title_full | A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| title_fullStr | A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| title_full_unstemmed | A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| title_short | A method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| title_sort | method for identifying common and unique issues in body in white dynamic stiffness based on modal contribution analysis |
| topic | Body-in-white Minimum dynamic stiffness Modal contribution NVH performance |
| url | https://doi.org/10.1038/s41598-025-97026-y |
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