Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis
Noise reduction of industrial products has been required for dealing with noise problem and satisfying comfortable living space. To reduce noise of the products, we need to identify surface that radiates the noise, and take measure against the noise. As a method to identify sound source, inverse-num...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2016-05-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/82/837/82_15-00646/_pdf/-char/en |
| _version_ | 1811221184333742080 |
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| author | Masahiro AKEI Nobutaka TSUJIUCHI Daisuke KUBOTA Akihito ITO Takayuki YAMAUCHI |
| author_facet | Masahiro AKEI Nobutaka TSUJIUCHI Daisuke KUBOTA Akihito ITO Takayuki YAMAUCHI |
| author_sort | Masahiro AKEI |
| collection | DOAJ |
| description | Noise reduction of industrial products has been required for dealing with noise problem and satisfying comfortable living space. To reduce noise of the products, we need to identify surface that radiates the noise, and take measure against the noise. As a method to identify sound source, inverse-numerical acoustic analysis (INA) has been proposed. INA is a method that identifies surface vibration of the sound source by using acoustic transfer functions and actual sound pressures which are measured at field points located near the sound source. In the INA, the measured sound pressures are used as the input data. For measuring sound pressures, we need to decide the arrangement of the field points, namely the number of microphones and its positions. The increase of field points leads to longer test and analysis time. Therefore, guidelines for the field point arrangement are needed to carry out the INA efficiently. In this study, we focused on the standard deviations of distance between sound source elements and field points, and proposed new evaluation function for optimal selection of the field points based on the standard deviations. The effectiveness of the new evaluation function had been verified by using plate model. As a result, we confirmed that the selection of optimal field point arrangement was achieved by using two guidelines, which are condition number and the new evaluation function we proposed. |
| first_indexed | 2024-04-12T07:54:56Z |
| format | Article |
| id | doaj.art-da2be80bcaaf44b3b46b91c310fbce24 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-12T07:54:56Z |
| publishDate | 2016-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-da2be80bcaaf44b3b46b91c310fbce242022-12-22T03:41:30ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612016-05-018283715-0064615-0064610.1299/transjsme.15-00646transjsmeProposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysisMasahiro AKEI0Nobutaka TSUJIUCHI1Daisuke KUBOTA2Akihito ITO3Takayuki YAMAUCHI4YANMAR CO.,LTD.Doshisha UniversityDepartment. of Mechanical Engineering, Doshisha UniversityDoshisha UniversityDepartment. of Mechanical Engineering, Doshisha UniversityNoise reduction of industrial products has been required for dealing with noise problem and satisfying comfortable living space. To reduce noise of the products, we need to identify surface that radiates the noise, and take measure against the noise. As a method to identify sound source, inverse-numerical acoustic analysis (INA) has been proposed. INA is a method that identifies surface vibration of the sound source by using acoustic transfer functions and actual sound pressures which are measured at field points located near the sound source. In the INA, the measured sound pressures are used as the input data. For measuring sound pressures, we need to decide the arrangement of the field points, namely the number of microphones and its positions. The increase of field points leads to longer test and analysis time. Therefore, guidelines for the field point arrangement are needed to carry out the INA efficiently. In this study, we focused on the standard deviations of distance between sound source elements and field points, and proposed new evaluation function for optimal selection of the field points based on the standard deviations. The effectiveness of the new evaluation function had been verified by using plate model. As a result, we confirmed that the selection of optimal field point arrangement was achieved by using two guidelines, which are condition number and the new evaluation function we proposed.https://www.jstage.jst.go.jp/article/transjsme/82/837/82_15-00646/_pdf/-char/ensound source identificationinverse-numerical acoustic analysissurface vibationacoustic analysissingular value decomposition |
| spellingShingle | Masahiro AKEI Nobutaka TSUJIUCHI Daisuke KUBOTA Akihito ITO Takayuki YAMAUCHI Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis Nihon Kikai Gakkai ronbunshu sound source identification inverse-numerical acoustic analysis surface vibation acoustic analysis singular value decomposition |
| title | Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis |
| title_full | Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis |
| title_fullStr | Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis |
| title_full_unstemmed | Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis |
| title_short | Proposal of the evaluation function for the optimal selection of measurement location in inverse-numerical acoustic analysis |
| title_sort | proposal of the evaluation function for the optimal selection of measurement location in inverse numerical acoustic analysis |
| topic | sound source identification inverse-numerical acoustic analysis surface vibation acoustic analysis singular value decomposition |
| url | https://www.jstage.jst.go.jp/article/transjsme/82/837/82_15-00646/_pdf/-char/en |
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