Results 81 to 90 of about 147,257 (198)
ON CALCULATION OF VIBRATION AND NOISE SPECTRA IN PROCESSING BOX BODIES WITH BALL-POINT REINFORCER
Advanced Engineering Research, 2010 Calculation of the vibration and noise spectra in processing box bodies with the ball-point reinforcer and theoretical research results of vibro-acoustic performance of this kind of treatment are presented.
Andrey N. LESHCHENKO
doaj
Acoustic fatigue and sound transmission characteristics of a ram composite panel design [PDF]
An experimental study to determine the acoustic fatigue characteristics of a flat multi-layered structural panel is described. The test panel represented a proposed design for the outer skin of a research application module to be housed within the space ...
Chang, K. Y. +2 more
core +1 more source
MoleculesUltrasonic absorption measurements were carried out over a wide concentration and temperature range by means of a pulse technique to examine the structural mechanisms and the dynamical properties in lithium hexamethyldisilazide (LiHMDS)–toluene solutions.
Constantine Kouderis +3 more
doaj +1 more source
Turbulent jet simulation using high-order DG methods for aeroacoustics analysis
, 2017 In this work, a high-order discontinuous Galerkin (DG) method is used to perform a large-eddy simulation (LES) of a subsonic isothermal jet at high Reynolds number Re D = 10^6 on a fully un-structured mesh.
Couaillier, Vincent +2 more
core
Acoustic signatures of organic films floating on the sea surface
Archives of Acoustics, 2014 A spectrum of low-frequency amplitude fluctuations of the ultrasonic signal specularly scattered from a wind-driven water surface covered with monomolecular crude oil origin film of well-defined oceanographically relevant viscoelastic properties, was ...
S. J. POGORZELSKI
doaj
Wave Generation by a Finite Baffle Array in Application to Beam-Forming Analysis
Archives of Acoustics, 2013 Directional excitation of sound in an aperiodic finite baffle system is analyzed using a method developed earlier in electrostatics. The solution to the corresponding boundary value problem is obtained in the spatial-frequency domain.
Yuriy TASINKEVYCH
doaj
Second- and Third-order Raman Scattering in Bulk and Glass-embedded Nanometric CdS1 – xSex Crystals [PDF]
Журнал нано- та електронної фізики, 2014 Second- and third-order Raman spectra of bulk and nanometric CdS1 – xSex crystals were measured. At off-resonance excitation conditions the second-order Raman spectra of bulk CdS1 – xSex exhibit anharmonic coupling of optical phonons and two-phonon ...
V.V. Lopushansky
doaj
Performance analysis of Thue Morse acoustic resonators for noise reduction
Scientific ReportsThis article explores acoustic band gap in the Thue-Morse phononic crystal structures for application in acoustic filtering. By using the unique nature of Thue-Morse sequences, we systematically analyze transmission spectra over many generations of ...
Zaky A. Zaky +4 more
doaj +1 more source
FREQUENCY SPECTRA OF ACOUSTIC EMISSION
Proceedings of the Japan Society of Civil Engineers, 1981 Yoshiji NIWA +3 more
openaire +2 more sources