Results 21 to 30 of about 183,967 (321)

Thermal performance enhancement of a heat exchanger using metal chain as a novel turbulator [PDF]

open access: yes, 2021
Enhancing heat transfer in a heat exchanger system is critical to many industrial applications. There are many problems that require in-depth studies to find solutions.
Ghitheeth, Ali Hussein
core  

Effect of Inerter on frequency characteristic of multi-DOF torsional vibration system

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Torsional vibration problem is one of the major technical problems of the industrial rotating machinery, especially, geared rotor system such as automatic transmissions from the view point of the transient response.
Aki OGAWA, Kazuhiko ADACHI
doaj   +1 more source

Semi-active control of crankshaft skyhook based on magnetorheological torsional damper

open access: yesFrontiers in Materials, 2022
The purpose of this study was to solve the problem that the damping of rubber or silicone oil torsional dampers used in crankshafts is not adjustable and cannot effectively control torsional vibration at different resonant frequencies.
Wei He   +7 more
doaj   +1 more source

Calculation and Optimal Design of Rotor Shaft Torsional Vibration of a Helicopter Transmission System

open access: yesJixie chuandong, 2022
The rotor shaft vibration of the helicopter transmission system is an important factor affecting its operational reliability. In order to improve the safety margin of torsional vibration of the rotor shaft system of a coaxial counter-rotating double ...
De Ni   +4 more
doaj  

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

Bifurcation characteristics of torsional-horizontal coupled vibration of rolling mill system [PDF]

open access: yesJournal of Vibroengineering, 2017
In this paper, the static bifurcation and dynamic bifurcation of rolling mill system with torsional-horizontal coupling vibration are studied. Firstly, the dynamic equation of torsional-horizontal coupled vibration of rolling mill main drive system is established. Rolling mill is driven by the gear pair, so the torsional vibration of the gear pair, the
Shuang Liu   +3 more
openaire   +1 more source

Transient torsional vibration analysis of marine diesel engine under short-circuit impact

open access: yesZhongguo Jianchuan Yanjiu
ObjectivesIn order to formulate an optimization scheme for the torsional vibration parameters of a marine diesel generator shaft system, it is necessary to analyze the transient torsional vibration characteristics of the diesel generator under short ...
Congcong XU   +6 more
doaj   +1 more source

Torsional Vibration Attenuation Characteristics and Stiffness Identification of Flexible Coupling in Vehicle Power Train

open access: yesShock and Vibration, 2020
Flexible coupling is one of the crucial components for vibration attenuation used in vehicle power train. Vibration attenuation characteristics and stiffness identification of flexible coupling are profoundly studied aiming at one vehicle power train ...
Shengping Fu   +4 more
semanticscholar   +1 more source

Design Improvement of a Viscous-Spring Damper for Controlling Torsional Vibration in a Propulsion Shafting System with an Engine Acceleration Problem

open access: yesJournal of Marine Science and Engineering, 2020
In order to cope with strengthened marine environmental regulations and to reduce fuel consumption, recently constructed vessels are equipped with an ultra-long stroke engine and apply engine de-rating technology.
Jaehoon Jee, Chongmin Kim, Yanggon Kim
doaj   +1 more source

Master-slave synchronous control method for attenuating dual mode electromechanical transmission system torsional vibration

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2022
The high-power electromechanical transmission (EMT) system is a typical dual-mode hybrid power transmission system. The torque fluctuation of internal combustion engine causes serious shock and vibration problems of EMT.
Wei Zhang   +4 more
doaj   +1 more source

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