Granular Media-Based Tunable Passive Vibration Suppressor

TBMG-16784

07/01/2013

Abstract
Content

A complete, tested, and tunable shock and vibration suppression device is composed of statically compressed chains of spherical particles. The device superimposes a combination of dissipative damping and dispersive effects. The dissipative damping resulting from the elastic wave attenuation properties of the bulk material selected for the granular media is independent of particle geometry and periodicity, and can be accordingly designed based on the dissipative (or viscoelastic) properties of the material. For instance, a viscoelastic polymer might be selected where broadband damping is desired. In contrast, the dispersive effects result from the periodic arrangement and geometry of particles composing a linear granular chain. A uniform (monatomic) chain of statically compressed spherical particles will have a low-pass filter effect, with a cutoff frequency tunable as a function of particle mass, elastic modulus, Poisson’s ratio, radius, and static compression. Elastic waves with frequency content above this cutoff frequency will exhibit an exponential decay in amplitude as a function of propagation distance.

Meta TagsDetails
Citation
"Granular Media-Based Tunable Passive Vibration Suppressor," Mobility Engineering, July 1, 2013.
Additional Details
Publisher
Published
Jul 1, 2013
Product Code
TBMG-16784
Content Type
Magazine Article
Language
English