Abstract
Problems with regard to the optimized design of structure-borne acoustic radiation in the intermediate-frequency region were first studied in this paper. The multi-objective optimization model was established based on structural dynamic response equation and acoustic radiation equation. Acoustic vibration analysis of cavity structural model was conducted to determine intra-cavity noise sources under different random excitation conditions, and then appropriate design variables were selected. Results indicated that after structural size optimization under different excitation conditions, the intra-cavity sound pressure levels lowered to a certain degree. Particularly in the low-frequency region, the maximum decreasing amplitude of sound pressure level could reach 5–7 dB, and the acoustic performance of cavity structure improved favourably.
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This work was financially supported by the National Natural Science Foundation of China (Grant No. 11404205) and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. GK201703015).
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Gao, J., Qiang, N. Multi-objective Optimized Noise Reduction Design of Complicated Structure-Borne Acoustic Radiation Under Multiple Constrains. Wireless Pers Commun 102, 3813–3824 (2018). https://doi.org/10.1007/s11277-018-5412-3
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DOI: https://doi.org/10.1007/s11277-018-5412-3