Airborne Noise Analysis Method for Mid Frequency in Consideration of Panel Modal Characteristic
振動モードを考慮した中周波空気伝播音の予測手法
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- Publication code
- 20214639
- Paper/Info type
- JSAE Transaction
Vol.52 No.5
- Pages
- 994-999(Total 6 p)
- Date of publication
- Sep 2021
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 研究論文 Translation |
|---|---|
| Category(E) | ResearchPaper |
| Author(J) | 1) 相澤 快, 2) 小林 憲正, 3) 森田 英憲, 4) 駒田 匡史 |
| Author(E) | 1) Kai Aizawa, 2) Norimasa Kobayashi, 3) Hidenori Morita, 4) Masashi Komada |
| Affiliation(J) | 1) トヨタ自動車, 2) トヨタ自動車, 3) トヨタ自動車九州, 4) トヨタ自動車 |
| Abstract(J) | 空気伝播音解析では音場と自動車ボデーの連成及び防音材の有限要素解析に時間がかかる．本報では解析時間を短縮するため，1次元音響場に縮小化した中周波空気伝播音の解析法を提案する．中周波で重要となる透過損失に対する振動モードの影響および防音材の減衰の予測法を提案し，車両の空気伝播音予測を目指す． Translation |
| Abstract(E) | In order to improve airborne noise in mid frequency, this paper proposes an efficient and fast simulation method in consideration of panel vibration modal characteristic. Firstly, because the panel vibration mode can increase/decrease the sound radiation, a new index called “Equivalent radiation power with phase-cancellation” is proposed to consider the effect of the modal characteristic onto panel transmission loss. Then, transmission loss of acoustic trims is also remodeled with transmissibility of the trim. With those proposed in this paper, airborne transfer function at mid frequency is simplified. The accuracy/benefit are discussed along with comparison of conventional solution and test results. |
