Results 1 to 10 of about 6,815 (161)

Experimental and numerical investigation of elastic wave dispersion and attenuation induced by coal particle damping [PDF]

Scientific Reports
The collision of skeletal matrix particles in dry coal plays a crucial role in the dispersion and attenuation of elastic waves. Using a low-frequency testing system, acoustic velocity dispersion and energy attenuation experiments were performed across a ...
Guangui Zou, Xiaolei Feng
exaly   +3 more sources

An Improved Method for Measuring Acoustic Attenuation in Viscoelastic Solid Media [PDF]

Micromachines
Accurate measurement of attenuation during acoustic wave propagation in viscoelastic solid media is of theoretical and practical significance. Conventional studies primarily rely on analogies to models of electromagnetic wave attenuation in non-ideal ...
Lin Fa, Jinyue Li, Huiting Yang, Yulin Xu, Hongyi Zhu, Xiangrong Fang, Xiao Zou, Ning Shen, Meishan Zhao   +8 more
doaj   +2 more sources

Application of particle damping for vibration attenuation in brake drum

International Journal of Vehicle Noise and Vibration, 2011
The mechanism of noise of brake is very complex. A particle damper can be introduced without changing the shape of the structure and the addition of mass, and it may be applied in extreme temperature environments where most conventional dampers would fail. However, previous particle damper designs have been based on trial-and-error experimentation.
Xiandong Liu
exaly   +2 more sources

Numerical Research on The Nozzle Damping Effect by A Wave Attenuation Method

Defence Technology, 2013
AbstractNozzle damping is one of the most important factors in the suppression of combustion instability in solid rocket motors. For an engineering solid rocket motor that experiences combustion instability at the end of burning, a wave attenuation method is proposed to assess the nozzle damping characteristics numerically.
Junwei Li
exaly   +2 more sources

Impact damping and vibration attenuation in nematic liquid crystal elastomers [PDF]

Nature Communications, 2021
AbstractNematic liquid crystal elastomers (LCE) exhibit unique mechanical properties, placing them in a category distinct from other viscoelastic systems. One of their most celebrated properties is the ‘soft elasticity’, leading to a wide plateau of low, nearly-constant stress upon stretching, a characteristically slow stress relaxation, enhanced ...
Saed, Mohand O., Elmadih, Waiel, Terentjev, Andrew, Chronopoulos, Dimitrios, Williamson, David, Terentjev, Eugene M.   +5 more
openaire   +5 more sources

Energy correction based on fluorescence attenuation of DAMPE [PDF]

Research in Astronomy and Astrophysics, 2020
Abstract The major scientific goals of the DArk Matter Particle Explorer (DAMPE) are to study cosmic-ray electrons (including positrons) and gamma rays from 5 GeV to 10 TeV and nuclei from Z = 1 to 26 up to 100 TeV. The deposited energy measured by the Bismuth Germanate Oxide (BGO) calorimeter of DAMPE is affected by fluorescence ...
Wu, Libo, Zhang, Yunlong, Zhang, Zhiyong, Wei, Yifeng, Wen, Sicheng, Dai, Haoting, Liu, Chengming, Wang, Xiaolian, Xu, Zizong, Huang, Guangshun   +9 more
openaire   +2 more sources

Connection Between Damping Torque Analysis and Energy Flow Analysis in Damping Performance Evaluation for Electromechanical Oscillations in Power Systems

Journal of Modern Power Systems and Clean Energy, 2022
The damping performance evaluation for electro-mechanical oscillations in power systems is crucial for the stable operation of modern power systems. In this paper, the connection between two commonly-used damping performance evaluation methods, i.e., the
Yong Hu, Siqi Bu, Xin Zhang, Chi Yung Chung, Hui Cai   +4 more
doaj   +1 more source

EFFECT OF DAMPING RATIO ON THE ATTENUATION RELATIONSHIP OF RESPONSE SPECTRUM

Doboku Gakkai Ronbunshuu A, 2006
Yoshihisa Maruyama, Fumio Yamazaki
exaly   +3 more sources

ANALYSIS OF THE FUNCTION RELATIONS BETWEEN THE DEPTH OF GAP OR SLOT AND THE SPEED OF VIBRATION IN MILLISECOND MULTIPLE-ROW HOLES BLASTING [PDF]

Engineering Heritage Journal, 2018
In order to analyze the attenuation law of blasting vibration wave through the damping groove, and to explore the function relations between the damping groove depth and damping effect of affiliation; the discussion about the blast hole millisecond ...
Xiao , Muhammad Aqeel
doaj   +1 more source

Investigation of the Physical Mechanism of Acoustic Attenuation in Viscous Isotropic Solids

Micromachines, 2022
The traditional acoustic attenuation coefficient is derived from an analogy of the attenuation of an electromagnetic wave propagating inside a non-ideal medium, featuring only the attenuation of wave propagation. Nonetheless, the particles inside viscous
Lin Fa, Lili Li, Hong Gong, Wenhui Chen, Jing Jiang, Guoqiang You, Jifeng Liang, Yandong Zhang, Meishan Zhao   +8 more
doaj   +1 more source