Zobrazeno 1 - 10
of 264
pro vyhledávání: '"Amr M. Baz"'
Publikováno v:
Vibration, Vol 4, Iss 3, Pp 586-601 (2021)
A new class of drill-strings is proposed for attenuating undesirable vibrations to ensure effective operation. The drill-string is provided with passive periodic inserts, which are integrated with sources of local resonance (LR). The inserts make the
Externí odkaz:
https://doaj.org/article/a293894ed1f54fe08b91cca5e7fd4335
Publikováno v:
Vibration, Vol 4, Iss 34, Pp 586-601 (2021)
Vibration
Volume 4
Issue 3
Pages 34-601
Vibration
Volume 4
Issue 3
Pages 34-601
A new class of drill-strings is proposed for attenuating undesirable vibrations to ensure effective operation. The drill-string is provided with passive periodic inserts, which are integrated with sources of local resonance (LR). The inserts make the
Autor:
K. Petrover, Amr M. Baz
Publikováno v:
The Journal of the Acoustical Society of America. 148:334-346
A class of passive nonreciprocal acoustic metamaterials is developed to control the flow and distribution of acoustic energy in acoustic cavities and systems. Such development departs radically from present methods that favor the transmission directi
Autor:
Amr M. Baz
Publikováno v:
The Journal of the Acoustical Society of America. 147:2656-2669
A class of active nonreciprocal metamaterials (ANMMs) is developed to control the flow and distribution of energy along periodic dynamical systems. Such a development constitutes a radical departure from the currently available approaches where the n
Autor:
Amr M. Baz, H. Zhou
Publikováno v:
The Journal of the Acoustical Society of America. 150(2)
This paper presents a class of active non-reciprocal metamaterials (ANMMs) in an attempt to control the flow of acoustic waves along a one-dimensional acoustic duct. The proposed method distinguishes itself from the available approaches where the non
Autor:
M. Raafat, Amr M. Baz
Publikováno v:
Journal of Vibration and Acoustics. 144
A theoretical and experimental investigation of a new class of a tensegrity-based structural damper is presented. The damper is not only capable of attenuating undesirable structural vibrations, as all conventional dampers, but also capable of comple
Autor:
Amr M. Baz
Publikováno v:
The Journal of the Acoustical Society of America. 151:A156-A156
The mode shape of piezoelectric metamaterials is tuned by manipulating spatially the electrical boundary conditions of the piezo-elements, in a desired and controlled manner, in order to tailor the wave propagation characteristics through these metam
Autor:
Amr M. Baz
Publikováno v:
The Journal of the Acoustical Society of America. 151:A96-A96
Acoustic energy is harvested using a piezoelectric-based metamaterial. The considered metamaterial harvester consists of a multi-cell array of acoustic cavities, which are provided with piezoelectric boundaries in a one-dimensional arrangement. Once
Publikováno v:
Journal of Sound and Vibration. 435:301-322
The stop and pass bands (i.e. the band gaps) characteristics are determined for gyroscopic systems by developing an approach which is compatible with such class of systems which is based on the concept of Bloch wave propagation in periodic structures