Results 21 to 30 of about 639,808 (203)

Dynamic Analysis of Percussion Drilling System under Harmonic Impact

open access: yesShock and Vibration, 2021
As a new efficient rock-breaking technology, harmonic impact drilling technology has received great attention, but the research on its rock-breaking mechanism is insufficient, which limits its development.
Yijin Zeng   +4 more
doaj   +1 more source

Behavioral Modeling of Memristors under Harmonic Excitation

open access: yesMicromachines, 2023
Memristors are devices built on the basis of fourth passive electrical elements in nanosystems. Because of the multitude of technologies used for memristor implementation, it is not always possible to obtain analytical models of memristors.
Elena Solovyeva, Artyom Serdyuk
doaj   +1 more source

Study on the effect of different pre-excitation factors on the output characteristics of MCSR

open access: yesEnergy Reports, 2022
This paper takes the BKFSZT-30000/400 three-phase eight-limb magnetically controlled shunt reactor as the research object. Firstly, an electromagnetic transient simulation model is established based on the parity principle to verify the operating ...
Junqiang Xing   +4 more
doaj   +1 more source

On the performance of a nonlinear vibration isolator consisting of axially loaded curved beams [PDF]

open access: yes, 2013
A desirable characteristic for nonlinear vibration isolators is a high static stiffness and a low dynamic stiffness. A curved beam is a possible candidate for this role provided that the amplitude of vibration about the static equilibrium position is ...
Brennan, MJ   +5 more
core   +1 more source

ON THE CONVERGENCE OF THE EULER HARMONIC SERIES [PDF]

open access: yes, 2000
The aim oj this article is to study the convergence oj the Euler harmonic series. Firstly, the results concerning the convergence oj the Smaralldache and Erdos harmonic junctions are reviewed Secondly, the Euler harmonic series is proved to be convergent
Tabirca, Tatiana, Tabirca, Sabin
core   +1 more source

Accelerated Sine-on-Random Vibration Test Method of Ground Vehicle Components over Conventional Single Mode Excitation

open access: yesApplied Sciences, 2017
Automotive manufacturers typically assess the mechanical durability performance of ground vehicle components for vibration excitation using either random or harmonic spectral loading patterns, such as the loading patterns suggested in international ...
Chan-Jung Kim
doaj   +1 more source

Harmonic diffeomorphisms of noncompact surfaces and Teichmüller spaces [PDF]

open access: yes, 2002
Let g : M -> N be a quasiconformal harmonic diffeomorphism between noncompact Riemann surfaces M and N. In this paper we study the relation between the map g and the complex structures given on M and N.
Markovic, V. (Vladimir)   +1 more
core   +1 more source

Dual-Inverter-Controlled Brushless Operation of Wound Rotor Synchronous Machines Based on an Open-Winding Pattern

open access: yesEnergies, 2020
In an open-winding machine, three-phase stator currents can be controlled such that the input armature currents may contain the third-harmonic current component in addition to the fundamental.
Syed Sabir Hussain Bukhari   +3 more
doaj   +1 more source

HARMONIC ANALYSIS OF TORSIONAL VIBRATION FORCE EXCITATION [PDF]

open access: yesScientific Journal of Silesian University of Technology. Series Transport, 2017
In our department, we deal with various methods for the continuous tuning of torsional oscillating mechanical systems during their operation, mainly in terms of torsional vibration magnitude.
Matej URBANSKÝ
doaj   +1 more source

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

open access: yesMathematics, 2022
The online frequency estimation of forced harmonic vibrations on a building-like structure, using a nonlinear flexible vibration absorber in a cantilever beam configuration, is addressed in this article.
Francisco Beltran-Carbajal   +5 more
doaj   +1 more source

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