JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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Other TitleSound transmission analysis of honeycomb model using FDTD method
Author(jpn)村上 桂一; 青山 剛史
Author(eng)Murakami, Keiichi; Aoyama, Takashi
Author Affiliation(jpn)宇宙航空研究開発機構; 宇宙航空研究開発機構
Author Affiliation(eng)Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency
Issue Date2008-02-29
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication title第39回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2007論文集
Proceedings of 39th Fluid Dynamics Conference/Aerospace Numerical Simulation Symposium 2007
Start page119
End page124
Publication date2008-02-29
AbstractThis paper provides the results of a numerical analysis on the sound transmission to modeled solid and hollow walls in order to investigate an acoustic characteristic of a honeycomb sandwich structure. The Finite Difference Time Domain (FDTD) method is used in this study because it is possible to solve both sound wave propagation in fluid and elastic wave propagation in solid simultaneously. From the results of isotropic solid wall calculations, there is the second transmission wave in the case of thick wall model, which is not observed in the case of thin wall model. On the other hand, the arch-shaped transmission wave is observed in the case of hollow wall model calculation, which is totally different from that of simple solid wall models.
DescriptionJAXA Special Publication
Keywordsrocket launching; launching site; aerodynamic noise; sound transmission; satellite launching; sound wave; wave propagation; elastic wave; fairing; finite difference time domain method; honeycomb structure; periodic boundary condition; ロケット打上げ; 射場; 空力騒音; 音響透過; 衛星打上げ; 音波; 波動伝播; 弾性波; フェアリング; 時間領域差分法; ハニカム構造; 周期的境界条件
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-07-016

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