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

February 14, 2018 | Aerospace | By admin | 0 Comments

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

ISBN-10: 1441993010

ISBN-13: 9781441993014

Advanced Aerospace functions, quantity 1. complaints 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 quarter of study and engineering. the gathering provides early findings and case reviews on basic and utilized elements of Structural Dynamics, together with papers on Aeroelasticity, floor trying out, Dynamic checking out of Aerospace buildings, and Random Vibration.

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Extra info for Advanced Aerospace Applications, Volume 1: Proceedings of the 29th IMAC, A Conference on Structural Dynamics, 2011

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Notice that the wavenumber domain spectrum was combined with the frequency spectrum of the driving signals applied to the annular array to create a 2D spectrum. For ease of comparison to dispersion curves, the 2D spectrum was transferred into a phase velocity dispersion curve space [8], as shown in Figure 5. It is clearly shown that with the 500 ns time delay the annular array transducer can efficiently excite the 200 kHz A0 mode. The experimental signal for the 500 ns time delay is given in Figure 6.

Notice that the wavenumber domain spectrum was combined with the frequency spectrum of the driving signals applied to the annular array to create a 2D spectrum. For ease of comparison to dispersion curves, the 2D spectrum was transferred into a phase velocity dispersion curve space [8], as shown in Figure 5. It is clearly shown that with the 500 ns time delay the annular array transducer can efficiently excite the 200 kHz A0 mode. The experimental signal for the 500 ns time delay is given in Figure 6.

Transient Guided Wave Experiment Prior to high frequency vibration modal analysis tests, a transient guided wave test was conducted first to validate the appropriate time delays for the excitations of different guided wave modes. A frequency of 200 kHz was used in the transient wave test. The test was carried out on a ¼” thick aluminum plate. Since the first cut-off frequency for the guided waves in the aluminum plate is much higher than 200 kHz, only two Lamb wave modes: A0 and S0 wave modes can be excited.

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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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