ZHANG Guo-jun, YAN Yun-ju, LI Peng-bo. Noise-induced Vibration Experiment of Aircraft Structure and Vibro-Acoustic Coupling Response Analysis[J]. Applied Mathematics and Mechanics, 2013, 34(11): 1157-1164. doi: 10.3879/j.issn.1000-0887.2013.11.005
Citation: ZHANG Guo-jun, YAN Yun-ju, LI Peng-bo. Noise-induced Vibration Experiment of Aircraft Structure and Vibro-Acoustic Coupling Response Analysis[J]. Applied Mathematics and Mechanics, 2013, 34(11): 1157-1164. doi: 10.3879/j.issn.1000-0887.2013.11.005

Noise-induced Vibration Experiment of Aircraft Structure and Vibro-Acoustic Coupling Response Analysis

doi: 10.3879/j.issn.1000-0887.2013.11.005
Funds:  The National Natural Science Foundation of China;The National Basic Research Program of China (973 Program)
  • Received Date: 2013-07-05
  • Rev Recd Date: 2013-09-12
  • Publish Date: 2013-11-15
  • Aimed at the hypersonic aircraft X-43A in the research, the FE model was established. Natural frequency testing of the aircraft structure model was performed. The numerical values of natural frequency were compared with the experiment results, with errors at about 1%, which showed that the FE model of the aircraft was correct. A noise-induced vibration experiment of the aircraft model was completed in the high intensity sound laboratory, which could obtain the results of PSD and noise pressure. Comparison of the simulation values with the experiment results shows that the method of numerical simulation is reliable in prediction of the vibration and noise environment of the aircraft cabin. The trend of the numerical vibro-acoustic response is well consistent with that of the test results: there is little difference in low-frequency range the elastic cavity structural vibration of the aircraft model caused by high-frequency noise field outside the cavity makes the main components of structural vibration, especially of the low-order structural vibration. Noise in the aircraft cabin transmitted from the outer noise field is through the low-order vibration of the aircraft shell. The main components of the response noise frequencies in the closed cabin belong to structural low-order modal vibration, even if the noise excitation outside the cabin is broadband.
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