Results 21 to 30 of about 3,708 (166)
Differential Equations of Torsional and Linear Vibrations of Dynamic System
Наука 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
Actuators, 2020 A piezoelectric motor driven by the first-order torsional and first-order flexural (T/F) vibrations is designed, fabricated, and tested in this study. The actuating force is generated by the torsional vibration of the dumbbell-shaped vibrator, while the ...
Jianye Niu +4 more
doaj +1 more source
Vibration measurement for crack and rub detection in rotors
Metrology and Measurement Systems, 2020 Shaft-stator rub and cracks on rotors, which have devastating effects on the industrial equipment, cause nonlinear and in some cases chaotic lateral vibrations.
Hajnayeb Ali +2 more
doaj +1 more source
DETERMINATION OF A TORSIONAL VIBRATION VISCOUS DAMPER’S OPERATING TEMPERATURE USING A NEW THERMOHYDRODYNAMIC MODEL [PDF]
Transport Problems, 2023 This article presents an innovative algorithm and mathematical model of a torsional vibration viscous damper. The problem of torsional vibrations damping in a multicylinder internal combustion engine is extremely important for the reliable operation of a
Wojciech HOMIK +2 more
doaj +1 more source
Counter torque control of torsional vibration suppression device using permanent magnets
Nihon Kikai Gakkai ronbunshu, 2022 A periodic reversal spring (PRS) with permanent magnets is proposed to suppress the torsional vibration of automobile powertrains. Results of numerical dynamic simulations pertaining to automobile powertrains from a previous study show that the magnetic ...
Tomohiro MIYABE +3 more
doaj +1 more source
Numerical Investigation on Torsional Mode Self-Excited Vibration of Guide Vane in a Reversible Pump-Turbine during Pump Mode’s Starting Up [PDF]
Journal of Applied Fluid Mechanics, 2022 In reversible pump-turbines, guide vane vibrations are considered to have potentially severe consequences of noise and structural damage. Unstable torsional mode self-excited vibrations of guide vanes have been reported at small guide vane openings ...
W. Kang, Q. Liang, L. Zhou, Z. Wang
doaj +1 more source
Torsional Vibration Mitigation in Wind Turbines Using BESS in a Microgrid
IEEE Open Access Journal of Power and EnergyThe paper introduces a damping control scheme utilizing a battery energy storage system (BESS) to mitigate torsional vibrations for wind turbine generators (WTGs) in a microgrid.
Yi-Wei Chen, Yuan-Yih Hsu
doaj +1 more source
Torsional Vibration Suppression in Railway Traction Drives
IEEE Access, 2022 Torsional vibrations phenomena are self-excited vibrations that occur in the wheelset of railway powertrains due to the counter-phase oscillation of both wheels. Long-lasting events of this type may lead to the catastrophic failures. Therefore, torsional
Ahmed Fathy Abouzeid +5 more
doaj +1 more source
Measurement of Stress Waves Propagation in Percussive Drilling
Sensors, 2021 This work describes the results of a test campaign aimed to measure the propagation of longitudinal, torsional, and flexural stress waves on a drill bit during percussive rock drilling.
Diego Scaccabarozzi, Bortolino Saggin
doaj +1 more source
Development of a torsional vibration suppression device using permanent magnets
Nihon Kikai Gakkai ronbunshu, 2021 Dual mass flywheel (DMF) dampers are conventionally used for torsional vibration suppression in automobile powertrains. The torsional vibration in powertrains has increased in recent years owing to the widespread downsizing of internal combustion engines
Tomohiro MIYABE +3 more
doaj +1 more source