Damping Characteristics of Flexural Vibration for Partially Covered Beams with Constrained Viscoelastic layers.

Dewa, Hiromi; Okada, Yohji; Nagai, Bunsyu

doi:10.1299/jsmec1988.34.210

Cited by 3 publications

(1 citation statement)

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“…5 Dewa et al used modal loss factors to estimate the loss factor of a partially covered five layered beam with alternate elastic and viscoelastic layers. 6 Loss factor enhancement in a structure by limiting the constraining layer to appropriate lengths was analysed by Plunkett and Lee. 7 Though loss factors of partially treated structures are obtained in several works, it is still unclear in literature as to which parameters will be influential and used to select the suitable location for providing the damping layer.…”

Section: Introductionmentioning

confidence: 99%

On the Region for the Application of Passive Damping Treatment and Loss Factor Enhancement

Joseph¹,

Renji²,

Venkatraman³

2019

The International Journal of Acoustics and Vibration

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The loss factor of a structure is significantly improved by using constrained damping treatment. For a mass efficient design, the damping material is to be applied at suitable locations. The studies reported in literature use the modal strain energy distribution in the viscoelastic material or the strain energy distribution in the base structure as tools to arrive at these suitable locations for the damping treatment. It is shown here that the regions identified through the above criteria need not be suitable for certain bending modes of vibration. A new approach is proposed in which the strain in the viscoelastic material and the angle of flexure are shown to be more reliable in arriving at the locations for the damping treatment. Providing damping layers at identified locations using these parameters results in significant loss factors with minimal added mass.

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Section: Introductionmentioning

confidence: 99%