2021 Fiscal Year Final Research Report
Vibro-acoustic coupled analysis and control using a concentrated mass model
| Project/Area Number |
19K14925
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | Seikei University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 集中系モデル / 有限要素法 / 音響構造連成解析 / 状態フィードバック |
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| Outline of Final Research Achievements |
In this study, the purpose is to establish an efficient suppression method for noise and vibration generated in vibro-acoustic coupled system. We constructed an analysis model using a concentrated mass model and designed a control system using the model. The concentrated mass model can be obtained by mass lumping the Raviart-Thomas element. In addition, numerical calculations were performed for the coupled system of the rectangular parallelepiped space and the flexible plate. The proposed method can analyze eigenvalues more efficiently than the conventional finite element method. However, the analysis accuracy of eigenvalues will decrease when analyzing with arbitrary shape elements. Finaly, a basic study was conducted on the control effect of the state feedback system in the mode coordinates.
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| Free Research Field |
機械力学，音響工学，制御工学
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| Academic Significance and Societal Importance of the Research Achievements |
音響構造連成現象の解析は近年でも重要な工学的課題と考えられており，当該現象の解析効率化は機械設計技術の向上に大きく寄与する．本研究では，音響構造連成現象の解析効率化を達成できる新たな解析モデルの開発を行い，数値計算によって有効性を確認することができた．また，解析モデルを使用した音響制御に関する基礎検討を行い，騒音・振動の能動的な抑制手法に関する知見を得た．上記の解析や制御を実用化する際の問題点も確認することができたため，当該分野の今後の研究方針に関する知見を得た．
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