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| Airborne Sound Control of Power Plant for Ship Cabin Based on VA One |
| Received:September 27, 2018 Revised:December 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.12.001 |
| KeyWord:VA One sound insulation performance restrained damping structure free damping structure |
| Author | Institution |
| HU Fan |
Institute of Powerplant and Automation, Shanghai Jiao Tong University, Shanghai , China |
| CHE Chi-dong |
Institute of Powerplant and Automation, Shanghai Jiao Tong University, Shanghai , China |
| LI Zheng-yang |
Institute of Powerplant and Automation, Shanghai Jiao Tong University, Shanghai , China |
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| Abstract: |
| Objective To study the effects of different constraints and different laying methods on the acoustic volume of compartment interval. Methods The Statistical Energy Analysis (SEA) model of two cabins was established by VA One to analyze the acoustic insulation performance of restrained and free damping structures. The influence of the thickness difference of both sides of metal layer on the sound insulation performance of the whole wall plate was discussed. For free damping structure, the effect of the relative position between metal layer and damping layer on its sound insulation performance was analyzed. Results The Type A acoustic meter right sound pressure level of restrained damping structure was higher than that of free damping structure. Conclusion When the thickness of the damping layer and the total thickness of the wall plate are constant, the relative position between the metal layer and the damping layer of the free damping structure has no effect on the actual sound insulation performance. When the thickness of metal layer on both sides of the structure is equal, the sound insulation effect is optimal. The larger the thickness difference is, the smaller the sound insulation quantity is. |
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