Movers and shakers: Granular damping in microgravity

Bannerman, Marcus N.; Kollmer, Jonathan E.; Sack, Achim; Heckel, Maria; Mueller, Peter; Pöschel, Thorsten

doi:10.1103/physreve.84.011301

Cited by 68 publications

(98 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experiment is numerically simulated in DY-NAMO [11], an event driven DEM software. The model assumes a 1D oscillation, no air resistance, ideal spring, hard and frictionless spheres as well as instantaneous collisions [9]. All other parameters (unless otherwise noted) are kept in accordance to the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…1) and detailed in [9] . The internal dimensions of the container are 50 mm×50 mm×L, where the length L (in the direction of the oscillation) is adjusted by altering the spacing of the end walls.…”

Section: Methodsmentioning

confidence: 99%

“…This can either be achieved using strong accelerations or by performing the experimental investigations under conditions of weightlessness. In this proceeding we compare the experimentally observed attenuation of an osciallating spring by a granular damper under microgravity conditions to an effective model for the energy dissipation of a granular damper operating in the collectand-collide regime [9]. A formula to optimize granular dampers and explaining the limits of collect-and-collide is derived and validated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Collective granular dynamics in a shaken container at low gravity conditions

Kollmer¹,

Sack²,

Heckel³

et al. 2013

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

Abstract. We investigate the collective dissipative behavior of a model granular material (steel beads) when subjected to vibration. To this end, we study the attenuation of the amplitude of an oscillating leaf spring whose free end carries a rectangular box partly filled with granulate. To eliminate the perturbing influence of gravity, the experiment was performed under conditions of microgravity during parabolic flights. Different regimes of excitation could be distinguished, namely, a gas-like state of disordered particle motion and a state where the particles slosh back and forth between the container walls in a collective way, referred to as collect-and-collide regime. For the latter regime, we provide an expression for the container size leading to maximal dissipation of energy, that also marks the transition to the gas like regime. Also for systems driven at fixed amplitude and frequency, we find both the gas regime and the collect-and-collide regime resulting in similar dissipative behavior as in the case of the attenuating vibration.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Collective granular dynamics in a shaken container at low gravity conditions

Kollmer¹,

Sack²,

Heckel³

et al. 2013

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bannerman et al [130] attached a particle damper to the free end of a spring blade and conducted a vibration control experiment under microgravity environment. It was shown that the effective energy dissipation is carried out under the collect-and-collide regime.…”

Section: Discrete/distinct Element Methods (Dem)mentioning

confidence: 99%

“…Moreover, Sánchez et al [23] also simulated the complex dynamic interaction among the particles by DEM and found that when the optimum damping is obtained, the particles tend to be dense. Interestingly, the dynamic characteristics of particle dampers in that case are similar to the impact damper with single particle.Bannerman et al [130] attached a particle damper to the free end of a spring blade and conducted a vibration control experiment under microgravity environment. It was shown that the effective energy dissipation is carried out under the collect-and-collide regime.…”

mentioning

confidence: 99%

Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

175

105

View full text Add to dashboard Cite

Particle damping, an effective passive vibration control technology, is developing dramatically at the present stage, especially in the aerospace and machinery fields. The aim of this paper is to provide an overview of particle damping technology, beginning with its basic concept, developmental history, and research status all over the world. Furthermore, various interpretations of the underlying damping mechanism are introduced and discussed in detail. The theoretical analysis and numerical simulation, together with their pros and cons are systematically expounded, in which a discrete element method of simulating a multi-degree-of-freedom structure with a particle damper system is illustrated. Moreover, on the basis of previous studies, a simplified method to analyze the complicated nonlinear particle damping is proposed, in which all particles are modeled as a single mass, thereby simplifying its use by practicing engineers. In order to broaden the applicability of particle dampers, it is necessary to implement the coupled algorithm of finite element method and discrete element method. In addition, the characteristics of experimental studies on particle damping are also summarized. Finally, the application of particle damping technology in the aerospace field, machinery field, lifeline engineering, and civil engineering is reviewed at length. As a new trend in structural vibration control, the application of particle damping in civil engineering is just at the beginning. The advantages and potential applications are demonstrated, whereas the difficulties and deficiencies in the present studies are also discussed. The paper concludes by suggesting future developments involving semi-active approaches that can enhance the effectiveness of particle dampers when used in conjunction with structures subjected to nonstationary excitation, such as earthquakes and similar nonstationary random excitations. KEYWORDS discrete element method, impact damping, nonlinear energy sink, particle damping, passive control, semiactive control | INTRODUCTIONParticle damping technology is a form of an auxiliary-mass type vibration damper, wherein multiple metal, tungsten carbide, ceramic or other types of small particles are placed within the cavities of the vibrating structure, or the enclosures attached to the vibrating structure in order to mitigate the response of the primary structure. [1,2] As the primary structure vibrates, kinetic energy is significantly absorbed through the combined effects of particle-to-particle and particle-to-wall inelastic collisions and frictional losses, producing considerable damping to the primary structure. [3][4][5][6] Particle damping technology has been widely Received: 23 February 2017 Revised: used due to its conceptual simplicity, moderate cost, good durability, and temperature insensitivity. Provided that the operating temperature is below the particles' metal melting point, it could maintain normal operation. Furthermore, material such as tungsten powder can withstand the high temp...

show abstract

DynamO: a free ${\cal O}$(N) general event‐driven molecular dynamics simulator

Bannerman

Sargant

Lue³

2011

J Comput Chem

Self Cite

155

137

View full text Add to dashboard Cite

Molecular dynamics algorithms for systems of particles interacting through discrete or "hard" potentials are fundamentally different to the methods for continuous or "soft" potential systems. Although many software packages have been developed for continuous potential systems, software for discrete potential systems based on event-driven algorithms are relatively scarce and specialized. We present DynamO, a general event-driven simulation package, which displays the optimal O(N) asymptotic scaling of the computational cost with the number of particles N, rather than the O(N log N) scaling found in most standard algorithms. DynamO provides reference implementations of the best available event-driven algorithms. These techniques allow the rapid simulation of both complex and large (>10 6 particles) systems for long times.The performance of the program is benchmarked for elastic hard sphere systems, homogeneous cooling and sheared inelastic hard spheres, and equilibrium LennardJones fluids. This software and its documentation are distributed under the GNU General Public license and can be freely downloaded from http://marcusbannerman.co.uk/dynamo.

show abstract

Movers and shakers: Granular damping in microgravity

Cited by 68 publications

References 48 publications

Collective granular dynamics in a shaken container at low gravity conditions

Collective granular dynamics in a shaken container at low gravity conditions

Particle impact dampers: Past, present, and future

DynamO: a free ${\cal O}$(N) general event‐driven molecular dynamics simulator

Contact Info

Product

Resources

About