Spontaneous catastrophe behaviour in acoustic black holes at low frequencies
Sign Up to like & getrecommendations! Published in 2021 at "Applied Acoustics"
DOI: 10.1016/j.apacoust.2021.108109
Abstract: Abstract In acoustic black holes (ABH) at low frequencies, catastrophe sound energy flux behaviour occurs spontaneously if the tip size of the ABHs reaches a critical value. This report demonstrates that this catastrophe behaviour can… read more here.
Keywords: catastrophe behaviour; low frequencies; black holes; spontaneous catastrophe ... See more keywords
Experimental evidence of energy transfer and vibration mitigation in a vibro-impact acoustic black hole
Sign Up to like & getrecommendations! Published in 2021 at "Applied Acoustics"
DOI: 10.1016/j.apacoust.2021.108168
Abstract: Abstract An experimental demonstration of the broadband passive damping capacity of a vibro-impact acoustic black hole (VI-ABH) is reported. A VI-ABH is an adaptation of the classical ABH design consisting of a beam with a… read more here.
Keywords: black hole; vibration; vibro impact; abh ... See more keywords
Improvement of the acoustic black hole effect by using energy transfer due to geometric nonlinearity
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Non-linear Mechanics"
DOI: 10.1016/j.ijnonlinmec.2016.11.012
Abstract: Acoustic Black Hole effect (ABH) is a passive vibration damping technique without added mass based on flexural waves properties in thin structures with variable thickness. A common implementation is a plate edge where the thickness… read more here.
Keywords: energy; nonlinearity; black hole; acoustic black ... See more keywords
Analysis of ray trajectories of flexural waves propagating over generalized acoustic black hole indentations
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2017.12.012
Abstract: Abstract An Acoustic Black Hole (ABH) indentation embedded in thin-walled structures has been proved remarkably useful for broadband flexural wave focalization, in which the phase velocity of the flexural waves and the refractive index of… read more here.
Keywords: flexural waves; black hole; acoustic black; ray trajectories ... See more keywords
Zero reflections by a 1D Acoustic Black Hole termination using thermally controlled damping
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2021.116282
Abstract: Abstract The design of lightweight and stiff structures with attractive vibration damping properties is a major issue in mechanical engineering. The insertion of Acoustic Black Holes (ABH) in a beam is a technique that consists… read more here.
Keywords: hole termination; black hole; termination using; zero reflections ... See more keywords
Transmission loss of plates with multiple embedded acoustic black holes using statistical modal energy distribution analysis
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2020.107262
Abstract: Acoustic black holes (ABHs) in beams and plates have been extensively studied as a passive method for vibration attenuation and noise reduction. However, most research to date has focused on analyzing the behavior of a… read more here.
Keywords: transmission loss; acoustic black; analysis; energy ... See more keywords
Acoustic black and white holes of potential flow in a tube
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.104020
Abstract: We propose a new simple model of acoustic black hole in a thin tube, where the difference in the gravitational potential is used to create a transonic flow. The main merit of our transonic flow… read more here.
Keywords: acoustic black; holes potential; black white; flow ... See more keywords
Elastic Wave Modulation in Hollow Metamaterial Beam With Acoustic Black Hole
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2938250
Abstract: We propose and discuss the elastic wave attenuation of hollow metamaterial beam embedded acoustic black hole. More abundant physical phenomena are given by modal analysis, shows that the band gap of three-dimensional acoustic black hole… read more here.
Keywords: black hole; hollow metamaterial; band; elastic wave ... See more keywords
Vibration suppressions using a dynamic absorber embedded with acoustic black hole features
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.5067807
Abstract: By capitalizing on the acoustic black hole (ABH) phenomena, an ABH-featured vibration absorber is proposed for the broadband vibration suppressions of a primary structure. As an add-on device to be attached to the primary structure,… read more here.
Keywords: vibration suppressions; vibration; black hole; acoustic black ... See more keywords
On the acoustic black-hole effect in waveguides
Sign Up to like & getrecommendations! Published in 2021 at "Journal of the Acoustical Society of America"
DOI: 10.1121/10.0004664
Abstract: The acoustic black-hole (ABH) effect is a well-known way of controlling structural vibrations in solid beams and plates. The theory behind this effect is to reduce the velocity of waves by altering the physical properties… read more here.
Keywords: black hole; effect; acoustic black; damping material ... See more keywords
Estimation of Wave Reflection Coefficient by Semi-Analytical Method in an Acoustic Black Hole Beam
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Applied Mechanics"
DOI: 10.1142/s1758825120500040
Abstract: Acoustic Black Hole (ABH) has been deployed into beam-plate structures with the passive damping system to enhance its performance in absorbing flexural waves. The wave reflection coefficient can be... read more here.
Keywords: reflection coefficient; black hole; acoustic black; wave reflection ... See more keywords