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کد مقاله : 1083-ISAV2019 (R1)

¹مهندسی مکانیک، دانشکده مهندسی مکانیک، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران

²دانشگاه صنعتی نوشیروانی بابل، بابل، ایران

The concept of an Acoustic Black Hole (ABH) has been developed and utilized as a new approach for passively attenuating structural vibration. In the present work, the effect of ABH absorb-er on the transient vibrational behavior and the steady-state of a Free-Free beam with linear and torsional springs on one edge is compared with the beam with a constant thickness-damping layer. In previous work, the focus was on the effect of ABH in the semi-infinite beams, while in the present work, the effect of ABH on a finite length beam is studied. The obtained results show that the superiority of ABH's to the uniform layer of the viscous layer occurs only in a narrow range of the parameters.

Acoustic Black Hole؛ Flexural vibrations؛ Viscoelastic layers؛ Passive structures

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