Abstract
A beam-type absorber has been known as one of the dynamic vibration absorbers used to suppress excessive vibration of an engineering structure. This paper studies an absorbing beam which is attached through a visco-elastic layer on a primary beam structure. Solutions of the dynamic response are presented at the midspan of the primary and absorbing beams in simply supported edges subjected to a stationary harmonic load. The effect of structural parameters, namely, rigidity ratio, mass ratio, and damping of the layer and the structure as well as the layer stiffness on the response is investigated to reduce the vibration amplitude at the fundamental frequency of the original single primary beam. It is found that this can considerably reduce the amplitude at the corresponding troublesome frequency, but compromised situation should be noted by controlling the structural parameters. The model is also validated with measured data with reasonable agreement.
Highlights
A beam-type absorber is one of the techniques to reduce undesirable vibration of many vibrating systems, such as a synchronous machine, mounting structure for a sensitive instrument, and other continuous structure in engineering
This paper investigates the effect of structural parameters, namely, the rigidity ratio, mass ratio, damping loss factor, the stiffness, as well as the damping ratio of the layer on the dynamic response of supported double-beam system to provide a thorough analysis
The effect of structural parameters on the dynamic response of a beam structure attached with a beam vibration absorber through a visco-elastic layer under a stationary harmonic load has been studied
Summary
A beam-type absorber is one of the techniques to reduce undesirable vibration of many vibrating systems, such as a synchronous machine, mounting structure for a sensitive instrument, and other continuous structure in engineering. An optimum tuning method to reduce the main beam vibration was proposed Another structural analysis and optimum design of a dynamic absorbing beam with free edges was studied by Chen and Lin [5]. Abu-Hilal [7] studied the effect of a moving constant load on the dynamic response of the beams This was done for different values of speed parameter, damping ratio, and stiffness parameter. This paper investigates the effect of structural parameters, namely, the rigidity ratio, mass ratio, damping loss factor, the stiffness, as well as the damping ratio of the layer on the dynamic response of supported double-beam system to provide a thorough analysis.
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