Results 21 to 30 of about 189,622 (293)

Forced-self-excited system of iced transmission lines under planar harmonic excitations [PDF]

Nonlinear Dynamics, 2021
Abstract This paper is concerned with the analysis of the self-excited vibrations and forced vibrations of the iced transmission lines. By introducing the external excitation load, the effect of dynamic wind on the nonlinear vibration equations of motion is reflected by vertical aerodynamic force. The approximate analytical solution of the non-
Xiaohui Liu, Shuguang Yang, Guangyun Min, Ceshi Sun, Haobo Liang, Ming Zou, Chuan Wu, Mengqi Cai   +7 more
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On artifact solutions of semi-analytic methods in nonlinear dynamics [PDF]

, 2018
Nonlinear dynamics is a topic of permanent interest in mechanics since decades. The authors have recently published some results on a very classical topic, the dynamics of a softening Duffing oscillator under harmonic excitation focusing especially on ...
Lentz, Lukas, Wagner, Utz von
core   +1 more source

Microscopic Studies on Two-Phonon Giant Resonances [PDF]

, 1999
A new class of giant resonances in nuclei, namely double giant resonances, is discussed. They are giant resonances built on top of other giant resonances.
Abel, Aguiar, Akulinichev, Aleixo, Aumann, Aumann, Barrette, Beene, Beene, Belyaev, Belyaev, Benesh, Berman, Berman, Bertrand, Bertrand, Bertsch, Bertsch, Bertulani, Bertulani, Bertulani, Bertulani, Bertulani, Bertulani, Bertulani, Bertulani, Bes, Boretzky, Bortignon, Bothe, Bracco, Bush, Canto, Carlson, Carlson, Carlson, Carlson, Catara, Catara, Chomaz, de Toledo Piza, Denisov, Dinh, Drożdż, Emling, Goldhaber, Grinberg, Gurevich, Hansen, Hussein, Hussein, Kneissl, Ko, Kox, Lanza, Lanza, Lauritsch, Lauritzen, Marumori, Mordechai, Mordechai, Nathan, Nishizaki, Nishizaki, Norbury, Ponomarev, Ponomarev, Ponomarev, Ponomarev, Ponomarev, Ponomarev, Ponomarev, Ponomarev, Ray, Raynal, Reiter, Ritman, Satchler, Schmidt, Sokolov, Soloviev, Steinwedel, Vasconcellos-Gomes, Vdovin, Veyssière, Volpe, Voronov, Voronov, Wen-Qing, Winther, Yannouleas, Zelevinsky, Zelevinsky   +92 more
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INTERPRETATION OF VIBRATION SIGNALS OF COMPLEX ROTOR SYSTEM BASED ON FRACTAL ANALYSIS

Авіаційно-космічна техніка та технологія, 2019
The work analyzes vibration signals obtained by simulating a turbine of a complex rotor system, for example, an aviation gas turbine engine, under conditions of stationary and non-stationary excitations. Four modes of vibration excitation are considered:
Надія Іванівна Бурау, Ольга Ярославівна Паздрій   +1 more
doaj   +1 more source

Dynamic Analysis of Percussion Drilling System under Harmonic Impact

Shock 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, Shidong Ding, Jinchao Xu, Qunai Hu, Xiaojie Cui   +4 more
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Study on the effect of different pre-excitation factors on the output characteristics of MCSR

Energy 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, Yunshuo Zhang, Gong Chen, Wendi Yu, Zhuwen Dai   +4 more
doaj   +1 more source

Flare-generated acoustic oscillations in solar and stellar coronal loops [PDF]

, 2004
Long period longitudinal oscillations of a flaring coronal loop are studied numerically. In the recent work of Nakariakov et al. (2004) it has been shown that the time dependence of density and velocity in a flaring loop contain pronounced quasi ...
Arber, Aschwanden, Aschwanden, Aschwanden, D. Tsiklauri, M. J. Aschwanden, Mathioudakis, McKenzie, Nakariakov, Ofman, Ofman, Peres, Rosner, Scargle, T. D. Arber, Tsiklauri, V. M. Nakariakov, Wang, Wang, Zaitsev   +19 more
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Fault-Tolerant Operation of Wound Field Synchronous Machine Using Coil Switching

IEEE Access, 2019
This paper proposes a fault tolerant operation of a wound field synchronous machine (WFSM) under the loss of excitation (LOE) fault in the rotor field winding. A two-mode field excitation scheme is presented, where the rotor of the WFSM was modified, and
Muhammad Ayub, Shahid Atiq, Ghulam Jawad Sirewal, Byung-Il Kwon   +3 more
doaj   +1 more source

Resonant plasmonic nanoparticles for multicolor second harmonic imaging [PDF]

, 2016
Nanoparticles capable of efficiently generating nonlinear optical signals, like second harmonic generation, are attracting a lot of attention as potential background-free and stable nano-probes for biological imaging.
Accanto, Nicolò, Hancu, Ion M., Hulst, Niek F. van, Piatkowski, Lukasz, Renger, Jan   +4 more
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Sudden excitations of harmonic normal modes

Journal of Mathematical Chemistry, 2022
AbstractThe N-harmonium boson system, i.e., a completely integrable model of N particles where both the external confinement and the two-particle interaction are harmonic, is investigated under the action of sudden time-dependent perturbation. This quench-like external perturbation of confinement has a quadrupolar space-character.
I. Aldazabal, I. Nagy
openaire   +3 more sources