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http://dx.doi.org/10.9766/KIMST.2018.21.4.422

Full-Frequency Band Acoustic Analysis of Sandwich Composite Structure Using FE-BEM and SEA Method  

Lee, Dae-Oen (The 1st Research and Development Institute, Agency for Defense Development)
Lee, Yoon-Kyu (The 1st Research and Development Institute, Agency for Defense Development)
Kim, Hong-Il (The 1st Research and Development Institute, Agency for Defense Development)
Kim, Jae-Young (The 1st Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.21, no.4, 2018 , pp. 422-428 More about this Journal
Abstract
Increase in use of lightweight structures, coupled with the increased acoustic loads resulting from larger and longer range guided missiles, has made missile more susceptible to failures caused by acoustic loads. Thus, accurate prediction of acoustic environment and the response is becoming ever more important for mission success. In this paper, the acoustic response of a sandwich composite skin structure to diffuse acoustic excitation is predicted over a broad frequency range. For the low frequency acoustic analysis, coupled FE-BEM method is used where the structure is modeled using FEM and the interior and exterior fluid is modeled using BEM. For the high frequency region, statistical energy analysis is applied. The predicted acoustic level inside the structure is compared with the result from acoustic test conducted in reverberation chamber, which shows very good agreement.
Keywords
Acoustic Anlaysis; Finite Element-Boundary Element Method; Statistical Energy Analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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