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Download PDF by Antonio Culla, Walter D Ambrogio (auth.), Tom Proulx (eds.): Advanced Aerospace Applications, Volume 1: Proceedings of

By Antonio Culla, Walter D Ambrogio (auth.), Tom Proulx (eds.)

ISBN-10: 1441993010

ISBN-13: 9781441993014

Advanced Aerospace functions, quantity 1. court cases of the twenty ninth IMAC, A convention and Exposition on Structural Dynamics, 2011, the 1st quantity of six from the convention, brings jointly 32 contributions to this crucial region of analysis and engineering. the gathering provides early findings and case stories on basic and utilized features of Structural Dynamics, together with papers on Aeroelasticity, flooring trying out, Dynamic trying out of Aerospace buildings, and Random Vibration.

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Unaccounted dynamic behaviour for acoustic loading of the satellite structure may lead to catastrophic failure in structural components or damage to the payload during launch. Therefore, successful design and deployment of precision systems such as satellites require highly accurate analytical models that need to be validated using experimental data. Prior to the test campaign, analytical predictions of the acoustic response were performed by MDA Space Missions to verify structural margins of safety and to ensure predicted equipment interface responses were within qualification limits.

Kx Ky Kz 2*U E -2 10 -3 10 -3 -4 10 Energy [W/Hz] Energy [W/Hz] 10 -5 -4 10 -5 10 10 -6 10 -6 10 -7 10 10 2 3 10 Frequency [Hz] 10 2 3 10 Frequency [Hz] Fig. 8. Kinetic-, potential- and full energy density during acceptance level run. Left: Probe2 and SP1. Right Probe4 and SP3-2. 4 Diffusion From the particle velocity in three directions and the nearby sound pressure the sound intensity and energy can be calculated. In an anechoic environment the field index ratio 2I/cE will approach unity. In a reverberant environment this quantity shall approach zero.

Right Probe4 and SP3-2. 4 Diffusion From the particle velocity in three directions and the nearby sound pressure the sound intensity and energy can be calculated. In an anechoic environment the field index ratio 2I/cE will approach unity. In a reverberant environment this quantity shall approach zero. 1 0 0 2 10 3 10 10 2 10 3 Frequency [Hz] Frequency [Hz] Fig. 9. Left: Diffusion calculated at four different locations and measurement runs. [17]. Right: diffusion in a gym. A remark has to be made here that for an accurate calculation of the intensity and energy the sensors should be as close as possible to each other (especially at high frequencies).

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Advanced Aerospace Applications, Volume 1: Proceedings of the 29th IMAC, A Conference on Structural Dynamics, 2011 by Antonio Culla, Walter D Ambrogio (auth.), Tom Proulx (eds.)


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