| Influence of Different Damping Layers on Sound Insulation Performance of Constrained Damping |
| Received:June 29, 2024 Revised:July 07, 2024 |
| DOI：10.12136/j.issn.1000-890X.2025.05.0365 |
| Key Words: constrained damping；IIR；NR；damping performance；sound insulation performance |
| Author Name | Affiliation | E-mail | | Hao Min* | Beijing Institute of Aeronautical Materials Co.，Ltd | haomin_mail@163.com | | TU Chunchao | Beijing Institute of Aeronautical Materials Co.，Ltd | | | REN Yuzhu | Beijing Institute of Aeronautical Materials Co.，Ltd | | | GUO Ruiyi | Beijing Institute of Aeronautical Materials Co.，Ltd | |
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| Abstract: |
| The damping performance of the vulcanizates with different base rubber[butyl rubber（IIR）/natural rubber] ratios，and the damping performance and sound insulation performance of the constrained dampings with the vulcanizates as damping layers were studied.The results showed that the damping performance of the vulcanizate with IIR as the main base rubber was the best，and the damping performance of the corresponding constrained damping tested by the cantilever beam mothed was also the best，while the insertion loss was the greatest.Under the premise of controlling additional mass，the resonance of the constrained damping could be suppressed and sound insulation performance could be improved by increasing the damping performance of damping layer. |
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