Zobrazeno 1 - 10
of 278
pro vyhledávání: '"Belhaq M."'
Publikováno v:
MATEC Web of Conferences, Vol 241, p 01010 (2018)
The present work examines the influence of time delay introduced in the piezoelectric circuit of an excited Duffing harvester device with hardening stiffness on the vibration and voltage amplitudes. Specifically, we seek to exploit a delayed electric
Externí odkaz:
https://doaj.org/article/bbc7cc86ebcd4f52bd53fb772c1fb7f8
Publikováno v:
MATEC Web of Conferences, Vol 241, p 01026 (2018)
In the present work, we report on energy harvesting in a delayed Rayleigh oscillator coupled to a piezoelectric harvester device. Analytical investigation using the multiple scales method is performed to obtain approximation of the periodic and QP am
Externí odkaz:
https://doaj.org/article/a9b238b0c1ab43359121ad8f239bd7e9
Publikováno v:
MATEC Web of Conferences, Vol 83, p 02002 (2016)
This paper presents the application of delayed feedback velocity for optimizing the harvested power in cubic nonlinear damper system. We consider a harvester consisting of a nonlinear single degree of freedom system (spring-masse-damper) subjected to
Externí odkaz:
https://doaj.org/article/5cef699b535c49b38b9d92db878384d1
Publikováno v:
MATEC Web of Conferences, Vol 83, p 02001 (2016)
We explore quasi-periodic (QP) vibration-based energy harvesting (EH) in a forced nonlinear oscillator under time delay. The energy harvesting system consists in a delayed Duffing oscillator subject to harmonic excitation coupled to an electric circu
Externí odkaz:
https://doaj.org/article/f5b763d2611743c58f4ede85f9d245a2
Publikováno v:
MATEC Web of Conferences, Vol 16, p 09003 (2014)
This paper deals with a mathematical model of controlling heat transfer in nanofluids. The time-periodic vertical vibrations of the system are considered to effect an external control of heat transport along with internal heating effects. A weakly no
Externí odkaz:
https://doaj.org/article/0f95f40766064e948230eec3e570fc5c
Publikováno v:
MATEC Web of Conferences, Vol 16, p 08005 (2014)
This paper investigates the influence of combined fast external excitation and fast parametric damp-ing on the amplitude and the onset of galloping of a tower submitted to steady and unsteady wind flow. A lumped single degree of freedom model is cons
Externí odkaz:
https://doaj.org/article/e61a94d83bdd4a5c8658d74c7ec85aa7
Publikováno v:
MATEC Web of Conferences, Vol 16, p 04002 (2014)
We study the control of bistability in non-contact mode AFM using time delay with modulated feedback gain. We consider that the tip-sample interaction force is described by Lennard-Jones potential and the equation of motion is modeled by single degre
Externí odkaz:
https://doaj.org/article/82d676d653a545ae8a5dba781a4786ce
Autor:
El gadari M., Belhaq M.
Publikováno v:
MATEC Web of Conferences, Vol 16, p 03003 (2014)
We report on the dynamic behavior of a rotary lip seal by considering the interaction between lip, film and shaft roughness assumed to have a periodic form. The nonlinearities of stiffness and viscosity of the film are taken into account in a mass-sp
Externí odkaz:
https://doaj.org/article/42b18fbd85514070a44658ed91dbc24f
Publikováno v:
MATEC Web of Conferences, Vol 1, p 02002 (2012)
Vibroimpact dynamics of a forced single-sided Hertzian contact oscillator are typically initiated by jumps phenomena near resonances. It was shown that high-frequency excitations can be used to shift the threshold of such vibroimpacts toward higher o
Externí odkaz:
https://doaj.org/article/8ab480e980a540ad9e55a357918512c8
Publikováno v:
MATEC Web of Conferences, Vol 1, p 10009 (2012)
In this paper, vibrations of a self-excited tower under turbulent wind flow, in the presence of a fast frequency excitation, are investigated and the corresponding equations of motion are derived. The nonlinear terms in the governing equation due to
Externí odkaz:
https://doaj.org/article/4fb4e210254e4617b751f1f169464baf