A virtual acoustic black hole on a cantilever beam

Quaegebeur, Samuel; Raze, Ghislain; Li, Cheng; Kerschen, Gaëtan

doi:10.1016/j.jsv.2023.117697

Cited by 8 publications

(7 citation statements)

References 31 publications

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“…The cantilever beam studied in [24] is considered herein. The beam is excited at its tip, and the transversal tip displacement is measured.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The readers are referred to [24] for a full description of the VABH formulation in state-space. In what follows, the ABH impedance is derived briefly using the Laplace transform.…”

Section: Vabh Formulationmentioning

confidence: 99%

“…In [24], the theory of section 2.1 was implemented with an accelerometer and a shaker that applies the transversal component of F tb . This design allowed to demonstrate the feasibility of the VABH concept but it lacked compactness.…”

Section: Mechanical System With Piezoelectric Patchesmentioning

confidence: 99%

“…In the same spirit, Soleimanian et al [23] reproduced the variations in ABH thickness with successive capacitors, which led to a maximum of 11% power radiation reduction in numerical simulations. Recently, we proposed the concept of a virtual ABH (VABH) where the mechanical ABH impedance, derived with a state-space approach [24], is simulated digitally. All ABH properties, namely the low reflection coefficient, the energy trapping, and vibration mitigation can be reproduced with a VABH.…”

Section: Introductionmentioning

confidence: 99%

“…The main thrust of this paper lies in the theoretical and experimental investigations of the so-called VABH [24] with piezoelectric patches and a digital unit to form a selfcontained and autonomous system, as depicted in figure 1. This research thus offers a very compact implementation of a highly versatile ABH.…”

Section: Introductionmentioning

confidence: 99%

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Realization of an autonomous virtual acoustic black hole with piezoelectric patches

Quaegebeur,

Raze,

Cheng

et al. 2024

Smart Mater. Struct.

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Acoustic black holes (ABHs) offer new opportunities for designing mechanical devices that can trap and reduce the vibrational energy of a system. This paper proposes the digital realization of the ABH effect, also called virtual ABH (VABH), through piezoelectric patches. A self-contained and autonomous reduction vibration device is thus developed. However, piezoelectric VABHs raise theoretical and experimental difficulties which are discussed herein. An improved pseudo-collocated approach is proposed, and the synthetic impedance is theoretically derived. Experiments are conducted using a cantilever beam where the VABH is implemented with few piezoelectric patches. It is shown to provide excellent vibration reduction over a large frequency range. The herein presented original concept solves the two long-lasting challenges of mechanical ABHs, i.e, its manufacturing and inability to operate at low frequencies, making it highly attractive for applications on real-life structures.

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“…The cantilever beam studied in [24] is considered herein. The beam is excited at its tip, and the transversal tip displacement is measured.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The readers are referred to [24] for a full description of the VABH formulation in state-space. In what follows, the ABH impedance is derived briefly using the Laplace transform.…”

Section: Vabh Formulationmentioning

confidence: 99%

Section: Mechanical System With Piezoelectric Patchesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations