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RISInternal Resonance Phenomena of the Jeffcott Rotor With Nonlinear Spring Characteristics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The Jeffcott rotor is a two-degree-of-freedom linear model with a disk at the midspan of a massless elastic shaft. This model, executing lateral whirling motions, has been widely used in the ...
Detection of a Rotor Crack Using a Harmonic Excitation and Nonlinear Vibration Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Detection of a rotor crack based on the nonlinear vibration diagnosis using harmonic excitation force is investigated. The open-close mechanism of crack is firstly modeled by a piecewise linear ...
Chaotic Vibration and Internal Resonance Phenomena in Rotor Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rotating machinery has effects of gyroscopic moments, but most of them are small. Then, many kinds of rotor systems satisfy the relation of 1 to (−1) type internal resonance approximately. In ...
Modeling and Nonlinear Vibration Analysis of a Rigid Rotor System Supported by the Magnetic Bearing (Effects of Delays of Both Electric Current and Magnetic Flux)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Active magnetic bearing (AMB) becomes widely used in various kinds of rotating machinery. However, as the magnetic force is nonlinear, nonlinear phenomena may occur when the rotating speed becomes ...
Vibration of the Rigid Rotor Supported by a Repulsive Magnetic Bearing (Influences of Magnetic Anisotropies of Magnets)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study focuses on the vibration of the rotor supported by a repulsive-type passive magnetic bearing. It evaluates the restoring force of a repulsive magnetic bearing numerically by considering ...
Vibration Analysis of a Self-Excited Vibration in a Rotor System Caused by a Ball Balancer
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The ball balancer has been used as a vibration suppression device in rotor systems. It has a superior characteristic that the vibration amplitude is reduced to zero theoretically at a rotational ...
Vibration Suppression Using Electromagnetic Resonant Shunt Damper
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An electromagnetic actuator has the property to convert mechanical energy to electrical energy and vice versa. In this study, an electromagnetic resonant shunt damper, consisting of a voice coil ...
Nonlinear Vibration Analysis of the Wind Turbine Blade (Occurrence of the Superharmonic Resonance in the Out of Plane Vibration of the Elastic Blade)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The use of wind turbine generator has rapidly spread as a one of the foremost clean energy sources. Recently, as the size of the wind turbine generator has become larger, its maintenance has ...
Vibrations of an Asymmetrical Shaft With Gravity and Nonlinear Spring Characteristics (Isolated Resonances and Internal Resonances)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An asymmetrical shaft supported by single-row deep groove ball bearings with clearance has nonlinear spring characteristics, rotating stiffness difference in shaft, and static stiffness difference ...
Suppression of the Forward Rub in Rotating Machinery by an Asymmetrically Supported Guide
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In rotating machinery, rubbing occurs between the rotor and the stator, at the seal, between the rotor and the guide and between the rotor and the backup bearing. The backward rub or the ...