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| Prediction of Broadband Sound Insulation of Stiffened Panels Based on Hybrid FE-SEA Method |
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| DOI：10.7643/issn.1672-9242.2022.09.006 |
| KeyWord:stiffened plate hybrid FE-SEA method sound insulation broadband aircraft |
| Author | Institution |
| PENG Tao |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
| HAN Peng-cheng |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
| LIU Xing-qiang |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
| YAN Qun |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
| ZOU Xue-feng |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
| QI Zhi-min |
Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity, Aircraft Strength Research Institute of China, Shaanxi Xi'an , China |
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| Abstract: |
| This paper aims to predict the broadband sound insulation characteristics of finite size stiffened plates and guide the acoustic design of the aircraft. The hybrid FE-SEA method is used to predict the acoustic characteristics of unidirectional stiffened plate structures. At the same time, the sound insulation test is carried out in a standard acoustic laboratory. Then, the predicted results of FE-SEA are compared with the test results and SEA calculation results. The results show that, I) compared with the SEA method, the predicted results of the FE-SEA method are more consistent with the experimental results in 50 Hz~10 kHz; II) the predicted results of the FE-SEA method are basically the same as the experimental results in the middle and high-frequency band (400 Hz~10 KHz); III) the predicted results of FE-SEA method are higher than the measured results in the low-frequency band (50 Hz~400 Hz), the lower the frequency, the greater the deviation. In the acoustic design of stiffened plates, the FE-SEA method should be preferred in order to obtain high-precision broadband sound insulation prediction results. The predicted results of the FE-SEA method can be used directly in the medium-frequency band and high-frequency band, and can only be used as a reference in the low-frequency band, Which should be corrected if it was used. |
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