Results 31 to 40 of about 3,708 (166)
EnergiesThe torsional, lateral, and axial vibrations that occur during drilling operations have negative effects on the drilling equipment. These negative effects can cause huge economic impacts, as the failure of drilling tools results in wasted materials, non ...
Mohamed Zinelabidine Doghmane
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Actuators, 2022 Torsional vibrations play a critical role in the design and operation of a mechanical or mechatronic drivetrain due to their impact on lifetime, performance, and cost.
Thijs Van der Veken +5 more
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THE DIAGNOSTICS OF VISCOTIC DUMPERS OF TORSIONAL VIBRATIONS [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2014 The general problems connected with the vibrations of crankshafts with a pay particular attention to the torsional vibrations are discussed in the paper.
Wojciech HOMIK
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Vibration analysis of simultaneous drilling and reaming BHA
Journal of Petroleum Exploration and Production Technology, 2020 The drillstring used in the oil and gas exploration is a complex structure due to the different forces acting on it. One of the primary sources of drillstring vibrations is the cutting forces caused by the drill bit contact with the rock formation.
Mohammed F. Al Dushaishi +1 more
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Vojnotehnički Glasnik, 2008 U radu je prikazan tradicionalan postupak proračuna torzionih oscilacija u sistemu brodske dizel motorne propulzije. Realan sistem zamenjen je ekvivalentnim sistemom sa 19 stepeni slobode kretanja, za koji su analizirane slobodne i prinudne torzione ...
Dragan R. Trifković +2 more
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Application of maximum principle optimizing active current subharmonic filter [PDF]
Омский научный вестник, 2019 In this article, the structure and parameters of an optimal regulator for active filter current subharmonics (AFSC) are received based on the optimal control method L. S. Pontryagin.
V. N. Anosov +2 more
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On “Lump mass torsional vibration model” and helical deformation of drill string
Petroleum, 2021 This paper analyses the physical models in “Kapitaniak M, Hamaneh VV, Chávez JP, Nandakumar K, Wiercigroch M. Unveiling complexity of drill–string vibrations: experiments and modelling. International Journal of Mechanical Sciences 2015; 101–102: 324–327”.
Zifeng Li
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Study Of Three Dimensional Propagation Of Waves In Hollow Poroelastic Circular Cylinders
International Journal of Applied Mechanics and Engineering, 2015 Employing Biot’s theory of wave propagation in liquid saturated porous media, waves propagating in a hollow poroelastic circular cylinder of infinite extent are investigated.
S.A. Shah
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Vibrations in Marine Power Transmission System
Scientific Journal of Gdynia Maritime University, 2017 Vibration analyses of marine machines and structures are one of the most important during the design process as well as during exploitation. Vibrations of ship hull (including superstructure and main engine body) are separately analysed from the ...
D. Doan, L. Murawski
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Applied SciencesTorsional vibrations pose a serious challenge in drilling operations and can lead to effects such as stick-slip phenomena, tool wear, and reduced drilling efficiency.
Chinedu Ejike +2 more
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