Computational Research on Vibro-Acoustics at Rocket Launch

A study to establish a numerical prediction method for vibro-acoustics during rocket launch has been conducted. This method consists of some analysis elements: numerical analysis of sound generation, propagation, transmission, and vibro-acoustics of payload. In this paper, sound pressure distributio...

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Bibliographic Details
Published inJournal of the Visualization Society of Japan Vol. 27; no. Supplement2; pp. 163 - 164
Main Authors NAKAMURA, Yoshiaki, KITAMURA, Keiichi, MURAKAMI, Keiichi, TAKAHASHI, Takashi, HASHIMOTO, Atsushi, AOYAMA, Takashi
Format Journal Article
LanguageJapanese
Published The Visualization Society of Japan 2007
Subjects
Acoustic Transmission
Numerical Analysis
Rocket Launch
Vibro-acoustics
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ISSN0916-4731
1884-037X
DOI10.3154/jvs.27.Supplement2_163

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Summary:A study to establish a numerical prediction method for vibro-acoustics during rocket launch has been conducted. This method consists of some analysis elements: numerical analysis of sound generation, propagation, transmission, and vibro-acoustics of payload. In this paper, sound pressure distributions obtained by these analyses are visualized. At first, flow and acoustic fields of modeled H-IIA launch pad are shown, which is obtained by a hybrid methodology of the Euler and Linearized Euler Equations (LEE) solvers. Then, an arch-shaped transmission wave is observed from a sound transmission analysis of hollow wall model using the Finite Difference Time Domain (FDTD) method. Finally, it is clearly shown that the acoustic field is affected by structural vibrations and the coupled vibro-acoustic problem of flexible satellite model can be solved by the Wave Based Method (WBM).
ISSN:0916-4731
1884-037X
DOI:10.3154/jvs.27.Supplement2_163