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63742020.pdf1.57 MB
title搭載宇宙機の音響構造連成解析手法に関する研究
Other TitleStudy on coupled structural-acoustic analysis for spacecraft
Author(jpn)高橋 孝; 村上 桂一; 青山 剛史; 相曽 秀昭
Author(eng)Takahashi, Takashi; Murakami, Keiichi; Aoyama, Takashi; Aiso, Hideaki
Author Affiliation(jpn)宇宙航空研究開発機構 総合技術研究本部 計算科学研究グループ; 宇宙航空研究開発機構 総合技術研究本部 計算科学研究グループ; 宇宙航空研究開発機構 総合技術研究本部 計算科学研究グループ; 宇宙航空研究開発機構 総合技術研究本部 計算科学研究グループ
Author Affiliation(eng)Japan Aerospace Exploration Agency Computational Science Research Group, Institute of Aerospace Technology; Japan Aerospace Exploration Agency Computational Science Research Group, Institute of Aerospace Technology; Japan Aerospace Exploration Agency Computational Science Research Group, Institute of Aerospace Technology; Japan Aerospace Exploration Agency Computational Science Research Group, Institute of Aerospace Technology
Issue Date2008-02-29
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
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 page125
End page130
Publication date2008-02-29
Languagejpn
AbstractThis paper focuses on numerical prediction approaches for steady-state coupled interior vibro-acoustic problems, especially for spacecraft structural vibrations by acoustic loads with the wide frequency range acted during the liftoff. Lightweight and large area structures, such as solar arrays and antenna dishes, and some components with relatively high natural frequencies are sensitive to acoustic loads. Numerical prediction of vibro-acoustic responses enables us to partially cover the ground acoustic tests, and is therefore quite important to design and develop reliable spacecraft. For spacecraft vibro-acoustic simulations, there are deterministic prediction techniques such as Finite Element Method (FEM) and Boundary Element Method (BEM) applicable in the low frequency range, and statistical ones such as Statistical Energy Analysis (SEA) in the high frequency range. However, there generally exists mid-frequency range where no mature numerical methods are applicable. In this paper, a novel deterministic prediction method called the Wave Based Method (WBM) is applied to obtain detailed responses in vibro-acoustic analysis of spacecraft. Then we consider two simple models, an uncoupled acoustic model with a single cavity, and a coupled vibro-acoustic model with a spacecraft and a payload fairing. Using a two-dimensional WBM code developed in this study and commercial FEM software, these models are solved to compare the results. The results show that FEM is limited to apply in low frequency range, and WBM is quite practical and has high potential for the vibro-acoustic analysis with the wide frequency range.
DescriptionJAXA Special Publication
宇宙航空研究開発機構特別資料
Keywordsliftoff; rocket launching; satellite launching; fairing; noise prediction; acoustic load; acoustic vibration; structural vibration; wave based method; finite element method; sound pressure; aeroacoustics; リフトオフ; ロケット打上げ; 衛星打上げ; フェアリング; 騒音予測; 音響負荷; 音響振動; 構造振動; 波動ベース法; 有限要素法; 音圧; 空力音響学
Document TypeConference Paper
JAXA Category特別資料
ISSN1349-113X
SHI-NOAA0063742020
Report NoJAXA-SP-07-016
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/55258


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