Topic
Dynamic Vibration Absorber
About: Dynamic Vibration Absorber is a research topic. Over the lifetime, 4764 publications have been published within this topic receiving 49429 citations.
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TL;DR: In this paper, the effect of higher frequency modes on the cyclically-coupled system was investigated and it was shown that the no-resonance zone is replaced by a resonance-suppression zone in which one structural mode is suppressed, but higher-order resonances still exist with the addition of the absorbers.
Abstract: This paper considers the dynamic response and order-tuning of vibration absorbers fitted to a rotating flexible structure under traveling wave (TW) engine order excitation. Of specific interest is the extension of previous results on the so-called no-resonance zone, that is, a region in linear tuning parameter space in which the coupled structure/absorber system does not experience resonance over all rotation speeds. The no-resonance feature was shown to exist for cyclic rotating structures with one structural and one absorber degree-of-freedom (DOF) per sector. This work uses a higher-fidelity structural model to investigate the effects of higher modes on the cyclically-coupled system. It is shown that the no-resonance zone is replaced by a resonance-suppression zone in which one structural mode is suppressed, but higher-order resonances still exist with the addition of the absorbers. The results are general, in the sense that one vibration mode can be eliminated using a set of identically-tuned ab-sorbers on a rotating structure with arbitrarily many DOFs per sector.
14 citations
Patent•
11 Jan 2012
TL;DR: In this article, an automobile energy renewable vibration absorber, consisting of an upper working cylinder and a lower working cylinder, is described, in which the lower working cylinders are connected into the upper working cylinders in a sliding mode, and a motion transformation mechanism is arranged in the lower cylinder.
Abstract: The invention discloses an automobile energy renewable vibration absorber, comprising an upper working cylinder and a lower working cylinder, wherein the lower working cylinder is connected into the upper working cylinder in a sliding mode; a energy renewable motor and a transmission mechanism are arranged in the upper working cylinder; and a motion transformation mechanism is arranged in the lower working cylinder. The motion transformation mechanism is a ball screw rod pair, transfers linear motion caused by the vibration of automobile wheels to rotary motion and transfers up and down motion to unidirectional rotary motion through overrunning clutchs with mutual opposite clutch directions in the transmission mechanism, and energy is transferred to electric power for use by the energy renewable motor.
14 citations
Patent•
07 Jul 2004
TL;DR: In this paper, a mass regulator is attached to the external surface of the liquid accumulating cylinder for regulating its mass to prevent its resonance at particular frequency, and another unit is provided for generated vibration heat to lower the vibration effect.
Abstract: A vibration damper for the liquid accumulating cylinder of sealed compressor features that a mass regulator is attached to the external surface of said liquid accumulating cylinder for regulating its mass to prevent its resonance at particular frequency, and another unit is provided for generated vibration heat to lower the vibration effect.
14 citations
TL;DR: In this paper, a low-frequency and high-amplitude swaying of the car body, which continues for a period of time, posing a danger to railway vehicles is described.
Abstract: Low-frequency swaying is an abnormal vibration of railway vehicles. It is manifested by a low-frequency and high-amplitude swaying of the car body, which continues for a period of time, posing a si...
14 citations
Patent•
29 May 1987
TL;DR: In this article, a flywheel has apertures 192 with walls that are arcs about an axis that are parallel to the axis of rotation of the flywheel 188, and a roller is inserted in each aperture 194.
Abstract: A knife drive centrifugal pendulum vibration absorber for an agricultural combine harvester includes a wobble drive assembly 82 with an input drive shaft 132. A flywheel 188 is secured to the wobble drive input drive shaft 132. The flywheel has apertures 192 with walls that are arcs about an axis that are parallel to the axis of rotation of the flywheel 188. A roller 194 is inserted in each aperture 194. The rollers 194 roll along the walls of the apertures 194 in response to changes in the speed of rotation of the flywheel 188 and absorb vibrations induced in the drive shaft 132 by a reciprocating knife assembly 74.
14 citations