Modal energy propagation method in coupled systems of rigid and flexible structure
Since the noise generated by mechanical structures affects the merchantability, it is important to predict it at the design stage. Statistical energy analysis (SEA), which solves the energy equilibrium equation between subsystems, is widely used to predict structural noise. However, due to the assum...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2022-11-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/88/916/88_22-00189/_pdf/-char/en |
| _version_ | 1797977084070461440 |
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| author | Koki YAMASHITA Akinori UTSUNOMIYA Iwao HONDA |
| author_facet | Koki YAMASHITA Akinori UTSUNOMIYA Iwao HONDA |
| author_sort | Koki YAMASHITA |
| collection | DOAJ |
| description | Since the noise generated by mechanical structures affects the merchantability, it is important to predict it at the design stage. Statistical energy analysis (SEA), which solves the energy equilibrium equation between subsystems, is widely used to predict structural noise. However, due to the assumption that eigenmodes are treated statistically, SEA is limited to application in the high-frequency range with high mode density, so it is the challenge to develop vibration power flow analysis method for the low- and mid-frequency range. In this study, we propose a modal energy propagation analysis method to evaluate the vibration power flow between the eigenmodes of a subsystem. In this paper, the validity of the theory and the countermeasures to reduce the vibration by controlling the transmitted power between the eigenmodes are verified using a simple test apparatus. As a result, it was shown that the transmitted power between subsystems can be approximated by the summation of the transmitted powers of individual eigenmodes, confirming the validity of the calculation theory. In addition, it was confirmed that the mean square velocity of the subsystem can be reduced by identifying and controlling the transmitted power of individual eigenmodes using this method. |
| first_indexed | 2024-04-11T05:01:18Z |
| format | Article |
| id | doaj.art-c4119e0411314ac4b60d1a490b776c34 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T05:01:18Z |
| publishDate | 2022-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-c4119e0411314ac4b60d1a490b776c342022-12-26T01:09:00ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612022-11-018891622-0018922-0018910.1299/transjsme.22-00189transjsmeModal energy propagation method in coupled systems of rigid and flexible structureKoki YAMASHITA0Akinori UTSUNOMIYA1Iwao HONDA2Technical Research Centor, Mazda Motor CorporationTechnical Research Centor, Mazda Motor CorporationDepartment of Mechanical Engineering, Nagasaki Institute of Applied ScienceSince the noise generated by mechanical structures affects the merchantability, it is important to predict it at the design stage. Statistical energy analysis (SEA), which solves the energy equilibrium equation between subsystems, is widely used to predict structural noise. However, due to the assumption that eigenmodes are treated statistically, SEA is limited to application in the high-frequency range with high mode density, so it is the challenge to develop vibration power flow analysis method for the low- and mid-frequency range. In this study, we propose a modal energy propagation analysis method to evaluate the vibration power flow between the eigenmodes of a subsystem. In this paper, the validity of the theory and the countermeasures to reduce the vibration by controlling the transmitted power between the eigenmodes are verified using a simple test apparatus. As a result, it was shown that the transmitted power between subsystems can be approximated by the summation of the transmitted powers of individual eigenmodes, confirming the validity of the calculation theory. In addition, it was confirmed that the mean square velocity of the subsystem can be reduced by identifying and controlling the transmitted power of individual eigenmodes using this method.https://www.jstage.jst.go.jp/article/transjsme/88/916/88_22-00189/_pdf/-char/ennoisevibrationmodal analysisstructure-borne soundcomponent mode synthesis |
| spellingShingle | Koki YAMASHITA Akinori UTSUNOMIYA Iwao HONDA Modal energy propagation method in coupled systems of rigid and flexible structure Nihon Kikai Gakkai ronbunshu noise vibration modal analysis structure-borne sound component mode synthesis |
| title | Modal energy propagation method in coupled systems of rigid and flexible structure |
| title_full | Modal energy propagation method in coupled systems of rigid and flexible structure |
| title_fullStr | Modal energy propagation method in coupled systems of rigid and flexible structure |
| title_full_unstemmed | Modal energy propagation method in coupled systems of rigid and flexible structure |
| title_short | Modal energy propagation method in coupled systems of rigid and flexible structure |
| title_sort | modal energy propagation method in coupled systems of rigid and flexible structure |
| topic | noise vibration modal analysis structure-borne sound component mode synthesis |
| url | https://www.jstage.jst.go.jp/article/transjsme/88/916/88_22-00189/_pdf/-char/en |
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