Performance of the bean bag impact damper for a sinusoidal external force

Popplewell, N.; Semercigil, S.E.

doi:10.1016/0022-460x(89)90922-x

Cited by 95 publications

(36 citation statements)

References 3 publications

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“…system under horizontal forced vibration. Popplewell and Semergicil [3] observed that a plastic &&bean bag'' "lled with lead shot exhibited greater damping e!ectiveness and &&softer'' impacts than a single lead slug of equal mass. The aforementioned studies were con"ned to frequencies at or below 20 Hz.…”

Section: Introductionmentioning

confidence: 98%

Particle Impact Damping

Friend

Kinra

2000

Journal of Sound and Vibration

218

123

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Section: Introductionmentioning

confidence: 98%

Particle Impact Damping

Friend

Kinra

2000

Journal of Sound and Vibration

218

123

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“…The explanations about the mechanism of impact damping mainly include the following interpretations: Some scholars held the opinion that the mechanism of impact damping is a certain kind of energy loss that is produced on the basis of the nonperfect elastic collision. [84] Popplewell [54] considered that the impact damping is mainly achieved by momentum exchange during the process of impact. More specifically, regarding the particle dampers in different forms, many scholars have studied the balance between the different approaches of energy consumption and the relationship between the damping mechanism and the design parameters.…”

Section: Damping Mechanism Of Particle Dampingmentioning

confidence: 99%

“…[59] The bean bag impact damper is also called the flexible restraint particle impact damper, which originated in the early 1980s. Popplewell et al [54] adopted this kind of damping technology when he was studying the vibration attenuation problem of the boring bar. The bean bag impact damper wraps a certain amount of metal or nonmetal micro particles with a soft bag which has a certain elastic resilience, putting it into a specific structural cavity FIGURE 1 Schematic diagram of the traditional particle dampers: (a) impact damper; (b) multi-unit impact damper; (c) particle damper; and (d) multi-unit particle damper instead of the rigid mass block of the traditional impact damper, as shown in Figure 3.…”

Section: The Configuration Improved Type Of Particle Dampersmentioning

confidence: 99%

Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

190

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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“…Attempts have been made to reduce the contact force and the corresponding high accelerations and noise level, by introducing the idea of multi-unit impact dampers [2,3], bean-bag dampers [4] and particle or granular impact dampers [5,6]. The problem with such systems is that accurate modelling of performance is difficult, compared with a single unit damper system, preventing prediction of performance.…”

Section: Introductionmentioning

confidence: 99%

A buffered impact damper for multi‐degree‐of‐freedom structural control

Darby

2008

Earthq Engng Struct Dyn

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SUMMARYThe results of an experimental investigation into the use of a buffered impact damper for controlling the dynamic response of an MDOF (multi-degree-of-freedom) structure are presented in this paper. Free and forced vibration tests of a three-DOF test structure equipped with a buffered impact damper are performed to evaluate the resulting damping effect and impact characteristics. The effect of damper parameters, such as clearance, and excitation type on the performance of the impact damper is also investigated. The performance of the buffered impact damper is compared with that of an equivalent conventional rigid impact damper. It is found that the buffered impact damper not only significantly reduces the peak contact force and the associated accelerations and noise generated by collisions but can also substantially enhance the damping effect over a wide range of frequencies, encompassing the natural frequencies of the test structure.

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Performance of the bean bag impact damper for a sinusoidal external force

Cited by 95 publications

References 3 publications

Particle Impact Damping

Particle Impact Damping

Particle impact dampers: Past, present, and future

A buffered impact damper for multi‐degree‐of‐freedom structural control

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