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Journal Articles
Journal:
Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. August 2023, 145(4): 041003.
Paper No: VIB-22-1396
Published Online: March 22, 2023
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 1 A bimorph piezoelectric cantilever beam periodically plucked by a magnet attached to a rotating, circular plate: ( a ) schematic of the system and magnetization directions, ( b ) dimensions and orientation of the magnets, and ( c ) schematic of the piezoelectric bimorph More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 2 Open-circuit ( β = 0) voltage at steady-state: ( a ) time history of the voltage v between a pluck ( τ = 0) and the next ( τ = T ) for ω = 0.10478 and α = 0.1, where α = d / R and T = 2 π / ω . −− −: numerical integration; —: MMS response and ( b ) mean squared open-circuit ... More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 3 Harmonic components V n of open-circuit voltage versus ω for α = 0.1, where n denotes the harmonic number: ( a ) ω near saddle-node bifurcation and ( b ) ω near Hopf bifurcation. It is noted that | V n | is plotted in a log scale More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 4 Divergence of the open-circuit voltage starting from ( a ) the saddle-node bifurcation point for ω = 0.10422 and ( b ) the Hopf bifurcation point for ω = 0.10478, and for α = 0.1. —: slowly varying envelope predicted by MMS. —: numerical integration. ×: instant the beam and plate coll... More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 5 Mean squared open-circuit voltage | v | a v 2 at steady-state versus ω for three values of h , where | v | a v 2 = ( 1 / T ) ∫ 0 T | v | 2 d τ : ( a ) h = 12, ( b ) h = 11, and ( c ) h = 10. —: MMS stable response. −− −: MMS u... More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 6 Average power β | v | a v 2 at steady-state versus ω for four values of β , and for α = 0.095. —: MMS stable response; −− −: MMS unstable response; °: numerical integration; and △ : Hopf bifurcation ( Hb ). More
Image
in Instability and Parametric Amplification of a Piezoelectric Energy Harvester Periodically Plucked by a Rotating Magnet
> Journal of Vibration and Acoustics
Published Online: March 22, 2023
Fig. 7 Comparison with the finite element method: ( a ) mode shape of the first mode of the cantilever beam in abaqus/standard and ( b ) mean squared beam tip displacement | x p | a v 2 at steady-state versus ω for four damping scenarios, where | x p | a v 2... More
Journal Articles
Journal:
Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. August 2023, 145(4): 041001.
Paper No: VIB-22-1314
Published Online: March 17, 2023
Journal Articles
Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part II Creeping Waves
Journal:
Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. August 2023, 145(4): 041002.
Paper No: VIB-22-1315
Published Online: March 17, 2023
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 1 Infinite double concentric large cylindrical shells with periodic bulkheads and cavities submerged in the water More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 2 Positive loading directions of the reactive forces at the inner and outer edges of the annular bulkhead More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 3 SPL comparisons of the present method, analytical model, and experimental measurements: ( a ) θ = 0 and ( b ) θ = π /4 More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 4 Partial and total sound pressure power spectra of inner cylindrical shell at 2kHz: ( a ) total sound pressure power spectra of inner cylindrical shell calculated by u ~ 3 ( i ) and u ~ 3 ( o ) , ( b ) partial sound pressure power spectra of inner... More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 5 Partial and total sound pressure power spectra of outer cylindrical shell at 2kHz: ( a ) sound pressure power spectra of outer cylindrical shell on the bottom cylindrical surface calculated by u ~ 3 ( i ) and u ~ 3 ( o ) , ( b ) partial sound pre... More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 6 Sound pressure power spectra of the cylindrical interface between the outer cylindrical shell and external free fluid at 4 kHz: ( a ) a 1 = 1.5 m, a 2 = 5 m and ( b ) a 1 = 4.4 m, a 2 = 5 m More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 7 Sound pressure power spectra of stiffened double cylindrical shells on the interface between the outer cylindrical shell and external free fluid at 2 kHz: ( a ) without annular fluid, ( b ) with annular fluid, and ( c ) with acoustic cavities More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 8 Sound pressure power spectra of stiffened double cylindrical shells with acoustic cavities on the two fluid–solid coupling interfaces of annular fluid at 2 kHz: ( a ) sound pressure power spectra of the inner cylindrical shell and ( b ) sound pressure power spectra of the outer cylindrical ... More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 9 Sound pressure power spectra of stiffened double cylindrical shells on the cylindrical interfaces between outer cylindrical shell and external free fluid at 4 kHz: ( a ) without annular fluid, ( b ) with annular fluid, and ( c ) with periodic cavities More
Image
in Acoustic Radiation From Stiffened Double Concentric Large Cylindrical Shells: Part I Circumferential Harmonic Waves
> Journal of Vibration and Acoustics
Published Online: March 17, 2023
Fig. 10 Sound pressure power spectra of stiffened double cylindrical shells on the two fluid–solid interfaces among inner cylindrical shell, annular cavities, and outer cylindrical shell at 4 kHz: ( a ) sound pressure power spectra of inner cylindrical shell and ( b ) sound pressure power spectra ... More