Prediction of the amplitude dependent behaviour of particle dampers

Wong, Chian; Daniel, Michelle; Rongong, J.A.

doi:10.2514/6.2007-2043

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…In an earlier work prior to this publication [27], it was assumed that the tangential stiffness played a negligible role in terms of energy storage and in energy dissipation. The tangential stiffness was then selected to be the same as the normal stiffness for simplicity.…”

Section: The Discrete Element Methodsmentioning

confidence: 99%

Energy dissipation prediction of particle dampers

Wong

Daniel

Rongong

2009

Journal of Sound and Vibration

186

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This paper presents initial work on developing models for predicting particle dampers behaviour using the Discrete Element Method (DEM). In the DEM approach, individual particles are typically represented as elements with mass and rotational inertia. Contacts between particles and with walls are represented using springs, dampers and sliding friction interfaces. In order to use DEM to predict damper behaviour adequately, it is important to identify representative models of the contact conditions. It is particularly important to get the appropriate trade-off between accuracy and computational efficiency as particle dampers ave so many individual elements. In order to understand appropriate models, experimental work w s carri d out to understand interactions between the typically small (~ 1.5-3 mm diameter) particles used. Measurements were made of coefficient of restitution and interface friction. These were used to give an indication of the level of uncertainty that the simplest (linear) models might assume.These data were used to predict energy dissipation in a particle damper via a DEM simulation. The results were compared with that of an experiment. Keywords: particle damping, energy dissipationThis paper presents initial work on developing models for predicting particle dampers behaviour using the Discrete Element Method (DEM). In the DEM approach, individual particles are typically represented as elements with mass and rotational inertia. Contacts between particles and with walls are represented using springs, dampers and sliding friction interfaces. In order to use DEM to predict damper behaviour adequately, it is important to identify representative models of the contact conditions. It is particularly important to get the appropriate trade-off between accuracy and computational efficiency as particle dampers have so many individual elements. In order to understand appropriate models, experimental work was carried out to understand interactions between the typically small (~ 1.5-3 mm diameter) particles used. Measurements were made of coefficient of restitution and interface friction. These were used to give an indication of the level of uncertainty that the simplest (linear) models might assume. These data were used to predict energy dissipation in a particle damper via a DEM simulation. The results were compared with that of an experiment.

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Section: The Discrete Element Methodsmentioning

confidence: 99%

Energy dissipation prediction of particle dampers

Wong

Daniel

Rongong

2009

Journal of Sound and Vibration

186

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“…friction and restitution coefficients) are determined as presented in this table. These parameters are selected according to a comprehensive study in which stainless steel -stainless steel and PMMA -stainless steel interactions were experimentally examined to extract the contact properties between those for DEM simulations [35].…”

Section: Dem Simulation Proceduresmentioning

confidence: 99%

The Dissipative Characteristics of Oblate Particles in Granular Dampers

Terzioglu¹,

Rongong²,

Lord³

2020

Proceedings of the XI International Conference on Structural Dynamics

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“…Additionally, Rongong et al . carried out several experimental studies on the amplitude dependent behavior of particle dampers.…”

Section: Experimental Study Of Particle Dampingmentioning

confidence: 99%

“…It was shown that the damping characteristics of the particle damper under horizontal-vertical excitations are similar to those under only vertical excitation. Additionally, Rongong et al [145][146][147] carried out several experimental studies on the amplitude dependent behavior of particle dampers. …”

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confidence: 99%

Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

201

105

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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...

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Prediction of the amplitude dependent behaviour of particle dampers

Cited by 6 publications

References 16 publications

Energy dissipation prediction of particle dampers

Energy dissipation prediction of particle dampers

The Dissipative Characteristics of Oblate Particles in Granular Dampers

Particle impact dampers: Past, present, and future

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