Measurement and Analysis of Vibration Damping Capacity of Lotus-Type Porous Magnesium

Abstract:

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Lotus-type porous magnesium was fabricated by unidirectional solidification of the melt dissolving hydrogen in a high-pressure mixture gas of hydrogen and argon. The damping constant  of porous magnesium with various porosities was measured by the hanging excitation method. The damping constant was defined as α=log (xn/xn+1)/T, where xn and xn+1 are the successive amplitude values of the damping wave, and T is the damping time. The frequency-amplitude dependence curve was obtained by Fast Fourier Transform analysis. The damping time of the lotus-type porous magnesium was observed to be shortened greatly compared with non-porous metals and porous copper. Moreover, the damping constant of the lotus-type porous magnesium was calculated by the damping amplitude.

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Periodical:

Edited by:

Yukichi Umakoshi and Shinji Fujimoto

Pages:

325-330

DOI:

10.4028/www.scientific.net/MSF.512.325

Citation:

Z. K. Xie et al., "Measurement and Analysis of Vibration Damping Capacity of Lotus-Type Porous Magnesium", Materials Science Forum, Vol. 512, pp. 325-330, 2006

Online since:

April 2006

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$35.00

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