Results 21 to 30 of about 13,672 (265)
Smart machines with flexible rotors
Mechanical Systems and Signal Processing, 2009 Abstract The concept of smart machinery is of current interest. Several technologies are relevant in this quest including magnetic bearings, shape memory alloys (SMA) and piezo-electric activation. Recently, a smart bearing pedestal was proposed based on SMAs and elastomeric O-rings.
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International Journal of Rotating Machinery, 2017 With the ever-increasing requirement for the thrust to weight ratio, the rotational speed of modern aeroengine is increasingly improved; thus most of the aeroengine rotor is flexible.
Zheng Longxi +2 more
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Lubricants, 2023 This study has investigated the influence of journal bearing wear on the dynamic behaviour of a flexible rotor with a central disc. Rotors supported on journal bearings are susceptible to self-excited whirling, leading to unstable conditions.
Faisal Rahmani, Emad Makki, Jayant Giri
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Electroactive Metal–Organic Frameworks for Electrocatalysis
Advanced Functional Materials, EarlyView.Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska +7 more
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Chinese Journal of Mechanical EngineeringUnbalanced force produced by the unbalanced mass will affect vibrations of rotor systems, which probably results in the components failures of rotating machinery.
Yajun Xu +3 more
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Balancing of Flexible Rotors by using Flexible Bearing Pedestals
Transactions of the Japan Society of Mechanical Engineers, 1970 In this paper, the balancing of flexible rotors by using flexible bearing pedestals is discussed. The rotor systems having flexible bearing pedestals are analyzed and the relations between the natural frequency of a pedestal system and that of the whole system are shown in a nondimensional form.
Takuzo IWATSUBO, Ryoji KAWAI
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Photoswitching Conduction in Framework Materials
Advanced Functional Materials, EarlyView.This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez +4 more
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International Journal of Rotating Machinery, 1997 Modelling and analysis of a rotor--bearing system with a new type of active oil bearing is presented. The active bearing is supplied with a flexible sleeve whose deformation can be changed during operation of the rotor. The flexible sleeve is also a part
J. M. Krodkiewski, Y. Cen, L. Sun
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Experimental study of coupled shaft bending - blade umbrella mode vibration of a turbine rotor model
Nihon Kikai Gakkai ronbunshu, 2014 This paper describes an experimental study on the characteristics of blade-shaft coupled bending vibration of a rotor system with a bladed disk. In a rotor with relatively long blades such as low-pressure steam turbines, the coupled vibration of shaft ...
Takeshi KUDO +5 more
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Electroactive Liquid Crystal Elastomers as Soft Actuators
Advanced Functional Materials, EarlyView.Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
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