Results 21 to 30 of about 1,070,708 (345)

Performance comparison of two different filter design approaches for torsional vibration damping in a doubly fed induction generator-based wind turbine

open access: yesThe Journal of Engineering, 2015
Conventional band-pass filter (BPF)-based damper is commonly employed to damp the vibrations in the drive train caused by turbulent winds. However, for the case of grid disturbances or faults resultant torsional vibrations, the performance of the BPF ...
Libo Liu, Da Xie
doaj   +1 more source

Breakdown of the mirror image symmetry in the optical absorption/emission spectra of oligo(para-phenylene)s [PDF]

open access: yes, 2005
The absorption and emission spectra of most luminescent, pi-conjugated, organic molecules are the mirror image of each other. In some cases, however, this symmetry is severely broken.
Andrew C. Grimsdale   +9 more
core   +3 more sources

Torsional vibrations of camshafts

open access: yesMechanism and Machine Theory, 1992
Abstract This study deals with the torsional vibrations on the camshafts in force closed cam mechanisms. On the cam mechanisms with reciprocating followers, the variable torque which is produced by force exerted to the cam from the follower, will create torsional vibrations on the camshaft.
Şaka, Ziya, Yılmaz, Yüksel
openaire   +1 more source

Intermittent behaviour of a Cracked Rotor in the resonance region [PDF]

open access: yes, 2008
Vibrations of the Jeffcott rotor are modelled by a three degree of freedom system including coupling between lateral and torsional modes. The crack in a rotating shaft of the rotor is introduced via time dependent stiffness with off diagonal couplings ...
Litak, Grzegorz, Sawicki, Jerzy T.
core   +3 more sources

Experimental investigation of torsional vibration isolation using Magneto Rheological Elastomer

open access: yesMATEC Web of Conferences, 2018
Rotating systems suffer from lateral and torsional vibrations which have detrimental effect on the roto-dynamic performance. Many available technologies such as vibration isolators and vibration absorbers deal with the torsional vibrations to a certain ...
Praveen Shenoy K   +3 more
doaj   +2 more sources

A Physically Consistent Model for Forced Torsional Vibrations of Automotive Driveshafts

open access: yesComputation, 2022
The aim of this research was to design a physically consistent model for the forced torsional vibrations of automotive driveshafts that considered aspects of the following phenomena: excitation due to the transmission of the combustion engine through the
Mihai Bugaru, Andrei Vasile
doaj   +1 more source

Influencing the conductance in biphenyl-like molecular junctions with THz radiation [PDF]

open access: yes, 2013
We investigate the torsional vibrations in biphenyl-like molecular junctions and transport properties in the presence of an external THz field. Ab-initio calculations including external electric fields show that the torsional angle {\phi} of a thiolated ...
Almenningen   +32 more
core   +2 more sources

New definition for torsional irregularity based on floors rotations of reinforced concrete buildings

open access: yesJournal of Engineering and Applied Science, 2022
Earthquake investigations confirm that un-symmetric buildings suffer more damage than their symmetric counterparts. Torsional vibrations due to irregularity are one of the main factors which cause damage to buildings.
Khaled M. Alaa   +2 more
doaj   +1 more source

Passive Control of Ultra-Span Twin-Box Girder Suspension Bridges under Vortex-Induced Vibration Using Tuned Mass Dampers: A Sensitivity Analysis

open access: yesBuildings, 2023
Suspension bridges’ in-plane extended configuration makes them vulnerable to wind-induced vibrations. Vortex shedding is a kind of aerodynamic phenomenon causing a bridge to vibrate in vertical and torsional modes.
Seyed Hossein Hosseini Lavassani   +3 more
doaj   +1 more source

Differential Equations of Torsional and Linear Vibrations of Dynamic System

open access: yesНаука и техника, 2004
The paper considers a five-mass dynamic system in which separate weights make angular and linear movements, it means that torsional and linear vibrations take place. The system of differential equations describing torsional and linear vibrations is given
N. A. Mikulik, G. N. Reizina
doaj   +1 more source

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