Results 21 to 30 of about 3,427 (254)

Vibration analysis of multi-stepped and multi-damaged parabolic arches using GDQ

open access: yesCurved and Layered Structures, 2014
This paper investigates the in-plane free vibrations of multi-stepped and multi-damaged parabolic arches, for various boundary conditions. The axial extension, transverse shear deformation and rotatory inertia effects are taken into account.
Viola Erasmo   +3 more
doaj   +1 more source

Relativistic Rational Extended Thermodynamics of Polyatomic Gases with a New Hierarchy of Moments

open access: yesEntropy, 2021
A relativistic version of the rational extended thermodynamics of polyatomic gases based on a new hierarchy of moments that takes into account the total energy composed by the rest energy and the energy of the molecular internal mode is proposed.
Takashi Arima   +3 more
doaj   +1 more source

Analysis of Dynamic Response Mechanism of Roadway Bolt

open access: yesAdvances in Civil Engineering, 2021
This work elucidates dynamic control equations of the anchoring system and the derivation of displacement equations and corresponding vibration modes. Furthermore, the anchoring system is found to be composed of three different vibration modes: (1) when ...
Qinjian Zhan   +5 more
doaj   +1 more source

An elastic mode parabolic equation in the case of weak shear modulus [PDF]

open access: yesProceedings of Meetings on Acoustics, 2015
We derive an elastic mode parabolic equation using the multiple-scale expansion method. The ratio of a typical wavelength to a typical size of horizontal inhomogeneities is chosen as a small parameter. The shear modulus is assumed to be of the order of the small parameter.
Mikhail Y. Trofimov   +2 more
openaire   +1 more source

Free Vibration Analysis of Tapered Rayleigh Beams resting on Variable Two-Parameter Elastic Foundation

open access: yesForces in Mechanics, 2023
This study aims at analyzing the effect of variable foundation parameters on the natural frequencies of a prestressed tapered Rayleigh beam having general elastically restrained ends.
Olanrewaju T. Olotu   +2 more
doaj   +1 more source

Simulation of a parabolic trough solar collector containing hybrid nanofluid and equipped with compound turbulator to evaluate exergy efficacy and thermal‐hydraulic performance

open access: yesEnergy Science & Engineering, 2022
This research is mainly aimed at investigating the numerical modeling of thermal‐hydraulic and exergy efficiencies of parabolic trough solar collectors (P‐SCs) filled with magnetic hybrid nanofluid.
Yacine Khetib   +5 more
doaj   +1 more source

An Anisotropic Damage Model of Quasi-Brittle Materials and Its Application to the Fracture Process Simulation

open access: yesApplied Sciences, 2022
Accurate predictions of the failure behaviors of quasi-brittle materials are of practical significance to underground engineering. In this work, a novel anisotropic damage model is proposed based on continuous damage mechanics.
Haijing Wang   +5 more
doaj   +1 more source

Dual Allosteric Effect in Glycine/NMDA Receptor Antagonism: A Comparative QSAR Approach

open access: yesPharmaceuticals, 2010
A comparative Hantzsch type QSAR study was conducted using multiple regression analysis on various sets of quinoxalines, quinoxalin-4-ones, quinazoline-2-carboxylates, 4-hydroxyquinolin-2(1H)-ones, 2-carboxytetrahydroquinolines, phenyl-hydroxy-quinolones,
Vipin B. Gupta, Manish Sharma
doaj   +1 more source

Mesoscopic Moment Equations for Heat Conduction: Characteristic Features and Slow–Fast Mode Decomposition

open access: yesEntropy, 2018
In this work, we derive different systems of mesoscopic moment equations for the heat-conduction problem and analyze the basic features that they must hold.
Luca Bergamasco   +5 more
doaj   +1 more source

A mode parabolic equations method with the resonant mode interaction

open access: yes, 2014
A mode parabolic equation method for resonantly interacted modes was developed. The flow of acoustic energy is conserved for the derived equations with an accuracy adequate to the used approximation. The testing calculations were done for ASA wedge benchmark and proved excellent agreement with COUPLE program.
Trofimov, M. Yu.   +2 more
openaire   +2 more sources

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