Results 21 to 30 of about 288,428 (355)

Investigations of structural vibrations problems of high performance machines [PDF]

FME Transactions, 2013
High performance machines are prone to presence of different types of dynamic loads, which can lead to vibrations of the entire structures or their local parts.
Rusinski Eugeniusz, Moczko Przemyslaw, Odyjas Piotr, Pietrusiak Damian   +3 more
doaj  

Numerical Vibro-Acoustic Analysis of a Ship Compartment Structure [PDF]

ITM Web of Conferences, 2019
This paper investigates the vibro-acoustic problems of an elastic compartment structure (wheel house) belonging to a ship, coupled to the enclosed air. The excitations from the structural walls of the room by the sound source cause vibrations throughout ...
Barcan Mihaela, Chirica Ionel, Beznea Elena-Felicia   +2 more
doaj   +1 more source

Suppression of kernel vibrations by layer-by-layer ligand engineering boosts photoluminescence efficiency of gold nanoclusters

Nature Communications, 2023
The photoluminescence of gold nanoclusters is affected by low-frequency acoustic vibrations. Here, the authors demonstrate that layer-by-layer ligand engineering can suppress such structural vibrations to achieve brighter emissions.
Yuan Zhong, Jiangwei Zhang, Tingting Li, Wenwu Xu, Qiaofeng Yao, Min Lu, Xue Bai, Zhennan Wu, Jianping Xie, Yu Zhang   +9 more
doaj   +1 more source

Lock-in of the vortex-induced vibrations of a long tensioned beam in shear flow [PDF]

, 2011
The occurrence of lock-in, defined as the local synchronization between the vortex shedding frequency and the cross-flow structural vibration frequency, is investigated in the case of a tensioned beam of length to diameter ratio 200, free to move in both
Bourguet, Rémi, Karniadakis, George E., Triantafyllou, Michael S.   +2 more
core   +1 more source

Fractional robust control with iso-damping property [PDF]

, 2008
This article deals with the problem of the reduction of structural vibrations with isodamping property. The proposed methodology is based on: - a contour defined in the Nichols plane and significant of the damping ratio of the closed-loop response - a ...
Janat, Yaman, Lanusse, Patrick, Nelson-Gruel, Dominique, Oustaloup, Alain, Pommier-Budinger, Valérie   +4 more
core   +2 more sources

Structural Vibration Detection Using the Optimized Optical Flow Technique and UAV After Removing UAV’s Motions

Applied Sciences
Traditional structural damage detection relies on multi-sensor arrays (e.g., total stations, accelerometers, and GNSS). However, these sensors have some inherent limitations such as high cost, limited accuracy, and environmental sensitivity.
Xin Bai, Rongliang Xie, Ning Liu, Zi Zhang   +3 more
doaj   +1 more source

Localization method of contact-type failure by measuring the structural intensity of low-frequency vibrations caused by frequency down-conversion of elastic vibrations

Mechanical Engineering Journal, 2021
Contact-type failures, such as early-stage fatigue cracks, bolt loosening, and welding cracks, are difficult to detect with nondestructive inspection, which uses ultrasonic waves or vibrations.
Takashi TANAKA, Junnosuke ASANO, Yasunori OURA   +2 more
doaj   +1 more source

Confinement effects on the vibrational properties of III-V and II-VI nanoclusters

, 2012
We present a first-principles study of the confinement effects on the vibrational properties of thousand atoms (radii up to 16.2 {\AA}) colloidal III-V and II-VI nanoclusters.
Bester, Gabriel, Han, Peng
core   +1 more source

Group theory for structural analysis and lattice vibrations in phosphorene systems [PDF]

, 2015
Group theory analysis for two-dimensional elemental systems related to phosphorene is presented, including (i) graphene, silicene, germanene and stanene, (ii) dependence on the number of layers and (iii) two stacking arrangements. Departing from the most
Almeida, R. M., Cançado, L. G., Dresselhaus, M. S., Jorio, A., Ribeiro-Soares, J.   +4 more
core   +2 more sources

Experimental Evaluation of Pedestrian-Induced Multiaxial Gait Loads on Footbridges: Effects of the Structure-to-Human Interaction by Lateral Vibrating Platforms

Sensors
The introduction of resistant and lightweight materials in the construction industry has led to civil structures being vulnerable to excessive vibrations, particularly in footbridges exposed to human-induced gait loads.
Bryan Castillo, Johannio Marulanda, Peter Thomson   +2 more
doaj   +1 more source