Showing papers on "Dynamic Vibration Absorber published in 1976"
TL;DR: In this paper, the response of a two-degree-of-freedom system with autoparametric coupling under the action of broad band random excitation is investigated, and the results show that large random motions of the coupled system may occur when the internal detuning parameter is close to the principal internal resonance, and that these motions may give rise to a suppression effect on the main system.
33 citations
TL;DR: In this article, the authors proposed a tuned vibration absorber with very low damping, which acts to reduce or suppress the vibration of a system having a resonant frequency near its operating frequency.
Abstract: This invention relates to suppression of vibrations in massive systems including large rotating elements such as induction fan rotors used in electric power generating plants. In particular, this invention relates to the provision of a tuned vibration absorber with very low damping, often known as a dynamic vibration absorber, which acts to reduce or suppress the vibration of a system having a resonant frequency near its operating frequency.
17 citations
TL;DR: In this paper, the authors presented some experimental and analytical studies on a new repulsive type dynamic vibration absorber consisting of three permanent magnets of thick disk type(1)∼(2).
Abstract: This paper presents some experimental and analytical studies on a new repulsive type dynamic vibration absorber consisting of three permanent magnets of thick disk type(1)∼(2). These magnets are so arranged in a non-magnetic conductive or non-conductive cylinder that one magnet can move freely between the two fixed ones. The result showed that: (1) Repulsive force(3) interacting between the two magnets may be assumed to be inversely proportional to the nth power of the center distance between the magnets. This assumption makes the analysis easier, and the results of the experiment show considerable coincidence with those of the analysis. (2) The new absorber may be able to control the resonant amplitude of the vibrating body which weighs several dozen times the free magnet. Further merits of the absorber are an eddy current damping generated in the conductive cylinder and arbitrary choice of the vibration direction as well as the frequency adjustability.
13 citations
TL;DR: In this article, an active vibration absorber controlling the pressure of the air spring is applied to a preview control system of a vehicle suspension, where the front half part of the vehicle functions as the sensor for the vibration absorption of the rear half part.
Abstract: In this paper, the active vibration absorber controlling the pressure of the air spring is applied to a preview control system of a vehicle suspension. The front half-part of the vehicle functions as the sensor for the vibration absorption of the rear half-part. The design criterion for the optimum preview control absorber is the minimization of the rms value of the acceleration under the specified constraints on the relative displacement. The optimum preview system is realized by the feedforward and feedback compensation systems. Chang's optimum control theory is applied to the optimization. The experimental results show good coincidence with the analyses.
13 citations
01 Jul 1976
TL;DR: In this paper, the isolation of machinery vibration from rigid and non-rigid substructures is described in uncomplicated terms, and the use of conventional dynamic absorbers to reduce the vibration of such structural members as beams (rails and stanchions) and circular plates (bulkheads) is discussed.
Abstract: : The isolation of machinery vibration from rigid and nonrigid substructures is described in uncomplicated terms One- and two-stage mounting systems, single and multiple antivibration mountings, and beamlike and platelike substructures are examined A machine and the intermediate mass of a two-stage mounting system are considered to be supported by flanges or feet to demonstrate the loss in isolation that can occur if the flanges are not rigid but are multiresonant because of their poor design The use of conventional dynamic absorbers to reduce the vibration of such structural members as beams (rails and stanchions) and circular plates (bulkheads) is discussed A novel dynamic vibration absorber is described that comprises a damped circular plate loaded centrally by a lumped mass and clamped at its perimeter to the vibrating item or structure of concern (Author)
11 citations
TL;DR: In this article, the effect of the attachment of a sub-system on frequency domain and time domain responses may be evaluated by using the Fast Fourier Transform (FFT) algorithm.
7 citations
TL;DR: In this paper, a seismic analysis of a building that exhibited this phenomenon is presented, and a theoretical development for such behavior in this building is described. But the authors focus on the part of the building that behaves like an absorber.
Abstract: Vibration absorbers are used in machine design to transfer fatigue-producing stresses from valuable equipment to relatively inexpensive replaceable devices. That is, the absorber becomes highly stressed over a certain frequency range while relieving the stress from the equipment. A similar phenomenon can occur in buildings to the detriment of the part of the building that behaves like an absorber. A seismic analysis of a building that exhibited this phenomenon is presented. A theoretical development for such behavior in this building is described.
4 citations
TL;DR: In this article, an analysis of the free vibrations of a disk-cable system spinning freely about a fixed axis through the disk center is presented, and it is shown how the cable can be used as a vibration absorber to reduce the effect of torsional disturbances on a rotating system.
Abstract: This paper presents an analysis of the free vibrations of a disk–cable system spinning freely about a fixed axis through the disk center. Secondly, it is shown how the cable can be used as a vibration absorber to reduce the effect of torsional disturbances on a rotating system.Subject Classification: [43]40.22, [43]40.70.
2 citations
Journal Article•
2 citations
Patent•
27 Oct 1976
TL;DR: In this paper, a vibration absorber that can curb vibration caused by rotation of a reciprocating compressor is proposed to improve the performance of a VCSR system in the presence of a noisy compressor.
Abstract: PURPOSE:A vibration absorber that can curb vibration caused by rotation of a reciprocating compressor.
1 citations