Results 21 to 30 of about 1,873,474 (208)

Experimental Research on Wind-Induced Flag-Swing Piezoelectric Energy Harvesters

open access: yesShock and Vibration, 2021
Piezoelectric cantilever beams, which have simple structures and excellent mechanical/electrical coupling characteristics, are widely applied in energy harvesting. When the piezoelectric cantilever beam is in a wind field, we should consider not only the
Jianjun Liu   +4 more
doaj   +1 more source

Stability and bifurcation analyses for exterior resonant families in Earth-Moon system

open access: yesResults in Physics, 2021
In this work, stability and bifurcation analyses for exterior resonant orbit families have been investigated for a test spacecraft around Earth-Moon system. The initial states are obtained for certain resonance ratio orbits in the two-body problem.
Xu Li   +3 more
doaj   +1 more source

In Situ Nanomechanical Measurements of Interfacial Strength in Membrane-Embedded Chemically Functionalized Si Microwires for Flexible Solar Cells [PDF]

open access: yes, 2012
Arrays of vertically aligned Si microwires embedded in polydimethylsiloxane (PDMS) have emerged as a promising candidate for use in solar energy conversion devices.
Cho, Clara J.   +3 more
core   +2 more sources

Structural Damage Detection by Using Single Natural Frequency and the Corresponding Mode Shape

open access: yesShock and Vibration, 2016
Damage can be identified using generalized flexibility matrix based methods, by using the first natural frequency and the corresponding mode shape. However, the first mode is not always appropriate to be used in damage detection. The contact interface of
Bo Zhao   +4 more
doaj   +1 more source

Effects of Temperature on Axial Crushing Behavior of Circular Multi-Walled Tubes

open access: yesMetals, 2023
In this work, the impact of temperature on the crushing performance of multi-walled tube (MWT) were investigated using a combined experimental, theoretical and numerical method.
Zhijia Zhang   +4 more
doaj   +1 more source

Structural Optimization of Tri-Cone Cyclone Based on the Response Surface Method

open access: yesShiyou jixie
There are scarce reports on the separation performance of discontinuous multi-cone cyclones. This paper presents a combined tricone cyclone structure. First, a numerical simulation was conducted for single factor analysis on the main structure, so as to ...
Qian Weifeng   +4 more
doaj   +1 more source

Fractal Model for Acoustic Absorbing of Porous Fibrous Metal Materials

open access: yesShock and Vibration, 2016
To investigate the changing rules between sound absorbing performance and geometrical parameters of porous fibrous metal materials (PFMMs), this paper presents a fractal acoustic model by incorporating the static flow resistivity based on Biot-Allard ...
Weihua Chen   +4 more
doaj   +1 more source

Dynamic Analysis of the Rod-Fastened Rotor Considering the Characteristics of Circumferential Tie Rods

open access: yesApplied Sciences, 2021
The research on the dynamic performance of the rod-fastened rotor (RFR) has always been a hotspot. However, the structural complexity of RFR has brought significant challenges to the dynamic study of the RFR.
Haoliang Xu, Lihua Yang, Tengfei Xu
doaj   +1 more source

Interactive Effects of Rarefaction and Surface Roughness on Aerodynamic Lubrication of Microbearings

open access: yesMicromachines, 2019
The aerodynamic lubrication performance of gas microbearing has a particularly critical impact on the stability of the bearing-rotor system in micromachines.
Yao Wu   +3 more
doaj   +1 more source

A lightweight low-frequency sound insulation membrane-type acoustic metamaterial

open access: yesAIP Advances, 2016
A novel membrane-type acoustic metamaterial with a high sound transmission loss (STL) at low frequencies (⩽500Hz) was designed and the mechanisms were investigated by using negative mass density theory.
Kuan Lu   +4 more
doaj   +1 more source

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