Zobrazeno 1 - 10
of 632
pro vyhledávání: '"Bergman, Lawrence"'
Beyond classical Bragg diffraction, we report on new sub-Bragg phenomena to achieve enhanced sound wave tunability in the low-frequency range in a multilayered acoustic metamaterial system. Remarkably, we reveal and study the formation of genuinely s
Externí odkaz:
http://arxiv.org/abs/2410.01178
This study investigates a vibroacoustic phononic metamaterial system composed of repeated monolayered membrane-air cavity unit-cells to assess its efficacy in controlling sound waves. Assuming low-frequency axisymmetric modes, the coupled membrane-ca
Externí odkaz:
http://arxiv.org/abs/2408.09660
The dissipative capacity as quantified by the nonlinear bandwidth measure of impulsively loaded primary structures (PSs) coupled to particle impact dampers (PIDs) is assessed. The considered PIDs are designed by initially placing different numbers of
Externí odkaz:
http://arxiv.org/abs/2311.06259
Publikováno v:
In Journal of Sound and Vibration 1 September 2024 585
In the sciences and engineering, the concept of bandwidth is often subject to interpretation depending upon context and the requirements of a specific community. The focus of this work is to formulate this concept for a general class of passive oscil
Externí odkaz:
http://arxiv.org/abs/2110.06770
The classical 'time-bandwidth' limit for linear time-invariant (LTI) devices asserts that it is impossible to store broadband waves (large {\Delta}{\omega}'s) for long times (large {\Delta}t's). For standing waves, i.e., vibrations, in particular, th
Externí odkaz:
http://arxiv.org/abs/2106.06814
Autor:
Krack, Malte, Aboulfotoh, Noha, Twiefel, Jens, Wallaschek, Jörg, Bergman, Lawrence A., Vakakis, Alexander F.
Publikováno v:
Archive of Applied Mechanics 87(4), 699-720, 2017
A mechanical system consisting of an elastic beam under harmonic excitation and an attached sliding body is investigated. Recent experimental observations suggest that the system passively (self-)adapts the axial location of the slider to achieve and
Externí odkaz:
http://arxiv.org/abs/2101.04004
Publikováno v:
Archive of Applied Mechanics 86 (6), 1083-1094, 2015
It is well-known that nonlinearity may lead to localization effects and coupling of internally resonant modes. However, research focused primarily on conservative systems commonly assumes that the near-resonant forced response closely follows the aut
Externí odkaz:
http://arxiv.org/abs/2101.03233
This work addresses friction-induced modal interactions in jointed structures, and their effects on the passive mitigation of vibrations by means of friction damping. Under the condition of (nearly) commensurable natural frequencies, the nonlinear ch
Externí odkaz:
http://arxiv.org/abs/2101.03232
Autor:
Gzal, Majdi, Carrion, Juan E., AL-Shudeifat, Mohammad A., Spencer, Billie F., Jr, Conte, Joel P., Vakakis, Alexander F., Bergman, Lawrence A., Gendelman, Oleg V.
Publikováno v:
In Engineering Structures 15 May 2023 283