A Combined Environments Facility for Testing of Space Shuttle External Tank Ice Ball Debris Liberation

McCall, Shannon; Hardy, Septian

doi:10.2514/6.2008-6914

Cited by 1 publication

(1 citation statement)

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“…In fact the real environment the space vehicles endured during launch is mainly composed of high acceleration, vibration, temperature, air pressure and noise [2].In order to make the preflight tests more effective, usually environmental testing is performed in a combined environments facility. In the recent years more and more combined environments facility appeared [3]. Whereas, as the preliminary work of The research of the high acceleration, vibration, temperature, air pressure and noise combined environmental test model machine, this paper present how to simulate the sound field of rectangular small enclosure excited by panel loudspeaker with FEM.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis for Sound Field of Rectangular Small Enclosure under the Excitation of Panel Loudspeaker by Using FEM

Fang

Shen

Guo

et al. 2010

AMR

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This paper aims to simulate the sound field of rectangular small enclosure excited by panel loudspeaker with FEM. Firstly, in order to testify the fluid-structure interaction theory in the field of acoustics calculation, coupled modal and uncoupled modal of loudspeaker and air were established. Result of harmonic response analysis shows that the vibration amplitude of uncoupled case is larger than the coupled case. The result just is in harmony with the fact. So when modeling the sound field, fluid-structure coupling should be taken into account. Secondly, for more accurate sound field simulation, different from most researchers’ modeling method that supposing the vibrating plate’s boundary of the loudspeaker is simply supported, this paper provide a more practical way that the boundary is elastic supported. The comparison shows that the resonance of air in enclosure is more severe under elastic boundary on condition of same driving force. Thereby the sound pressure is higher.

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Section: Introductionmentioning

confidence: 99%