Results 11 to 20 of about 9,936 (212)

Active Metamaterials with Tunable Shear Nonreciprocity and Nonlinear Dynamics. [PDF]

Adv Sci (Weinh)
Active gear‐based mechanical metamaterials enable simultaneous control of translational and torsional stiffnesses by 30–100×, break shear reciprocity under positive versus negative loads, broadly tune resonant frequencies, and offer programmable dynamic responses.
Fang X, Yu M, Yu D, Cheng L.
europepmc   +2 more sources

Stiffness and vibration isolation characteristics of a torsional isolator with negative stiffness structure [PDF]

Journal of Vibroengineering, 2018
This paper proposes a novel design torsional vibration isolator with negative stiffness structures. It consists of two shafts that are linked by positive springs and negative stiffness structures. The connection position of the two shafts has been designed into disc structure, which is the installation position of the positive springs and negative ...
Hui Liu, Xiaojie Wang, Feng Liu
openaire   +1 more source

Nonlinear behavior of quasi-zero stiffness nonlinear torsional vibration isolator

Nonlinear Dynamics, 2023
Abstract This paper researches the nonlinear behavior of a nonlinear torsional vibration isolator (NTVI) which is composed of flexible rod element and electromagnetic element. And the NTVI has a quasi-zero stiffness (QZS) characteristic. Firstly, a statics model of the QZS-NTVI is established and the effects of geometric parameters on the QZS ...
Jiawei Xu, Jianping Jing
openaire   +1 more source

Robust Power Designing of Supplementary Damping Controller in VSC HVDC System to Improve Energy Conversion Efficiency of Wind Turbine and Power System Stability

Journal of Electrical and Computer Engineering, 2022
Because of low losses and voltage drop, fast control of power, limitless connection distance, and isolation issues, using high-voltage direct-current (HVDC) transmission system is recommended to transfer power in the power systems, including wind farms ...
A. Hamidi, J. Beiza, T. Abedinzadeh, A. Daghigh   +3 more
doaj   +1 more source

Low frequency elastic measurements on solid $^{4}$He in Vycor using a torsional oscillator [PDF]

, 2014
Torsional oscillator experiments involving solid $^{4}$He confined in the nanoscale pores of Vycor glass showed anomalous frequency changes at temperatures below 200 mK.
Balibar, S., Beamish, J. R., Fefferman, A. D., Haziot, A.   +3 more
core   +2 more sources

On the scattering of longitudinal elastic waves from axisymmetric defects in coated pipes [PDF]

, 2013
This is the post-print version of the final paper published in Journal of Sound and Vibration. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural ...
Alleyne, Barshinger, Bartoli, Benmeddour, Carandente, Castaings, Castaings, Demma, Ditri, Engan, Gregory, Hayashi, Hayashi, Hua, Kirby, Kirby, Kirby, Kirby, Lawrie, Ma, Marzani, Peter Mudge, Predoi, Ray Kirby, Simonetti, Vogt, Zahari Zlatev, Zhou   +27 more
core   +2 more sources

Torsional negative stiffness mechanism by thin strips

Theoretical and Applied Mechanics Letters, 2019
: Negative stiffness mechanisms have great application potential in different fields, such as vibration isolation, energy absorption and mesh antenna unfolding. Although numerous compliant mechanisms with negative stiffness features have been implemented
Jinyou Li, Kangjia Fu, Yongpeng Gu, Zhihua Zhao   +3 more
doaj   +1 more source

Electromagnetic prompt response in an elastic wave cavity

, 2015
A rapid, or prompt response, of an electromagnetic nature, is found in an elastic wave scattering experiment. The experiment is performed with torsional elastic waves in a quasi-one-dimensional cavity with one port, formed by a notch grooved at a certain
Báez, G., Cobián-Suárez, M., Martínez-Argüello, A. M., Martínez-Mares, M., Méndez-Sánchez, R. A.   +4 more
core   +1 more source

Hysteretic behavior of a belt tensioner: modeling and experimental investigation [PDF]

, 2005
In this paper we describe the modeling of the hysteretic behavior of belt tensioners. An initial experimental device is composed only of the tensioner by using forcing frequencies, preloads and deflection amplitudes.
Dufour, Regis, Manin, Lionel, Michon, Guilhem   +2 more
core   +3 more sources

Research on Ground Vibration and Isolation Methods in Dynamic Micro-Thrust Measurement

IEEE Access
In the field of dynamic microthrust measurement, ground vibration noise poses a particularly complex and formidable challenge, significantly disrupting measurement accuracy, especially in dynamic scenarios.
Linxiao Cong, Haoye Deng, Hao Liu, Jiabin Wang, Chunyuan Zhu, Jianchao Mu, Zhan Hu, Bin Wang, Jianfei Long, Congfeng Qiao   +9 more
doaj   +1 more source