The Damped Eigenfrequency Analysis for an Elastic Disk Clamped by a Water-Filled Cylinder

Abstract:

A vibroacoustic testing model in laboratory for the damped eigenfrequencies and eigenmodes is introduced in this paper. The unsymmetric (u, p) variational formulas are implemented for three dimensional structures based on the elastodynamic displacement field u and the fluid acoustic pressure field p. The damping coefficients of materials seem to have no obvious effect on the coupled numerical model. Then the damped eigenfrequencies can alternately be obtained by vibration signal analysis method. The Fast Fourier Transform for the spectrum domain analysis illustrates an effective means to evaluate the damped eigenfrequencies.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 3742-3747
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.3742
• Online since: March 2012
• Authors: Zhi Xi Yang
• Keywords: Eigenfrequency, Fluid Structure Interaction (FSI), Structural Acoustic Vibration

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