Experimental investigation on dynamic characterization and seismic control performance of a TLPD system

Dai, Kaoshan; Wang, Jianze; Mao, Rifeng; Lu, Zheng; Chen, Shen-En

doi:10.1002/tal.1350

Cited by 46 publications

(42 citation statements)

References 38 publications

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“…This type of variant mainly includes the impact damper-tuned absorber combination, [71][72][73] the particle TMD, [74][75][76] and the tuned liquid particle damper. [77] The concept of integrating the impact damper with the tuned absorber was introduced first by Masri [78] in 1971, who proposed the use of the dynamic vibration neutralizer (i.e., TMD) with motion-limiting stops that reflect the physics of an impact damper interacting with the primary system when a motion threshold is exceeded. The study of Masri [78] provided an exact analytical solution under steady-state conditions, as well as experimental verification demonstrating the potential advantages of such devices to provide effective damping at relatively low as well as high levels of the primary system response.…”

Section: The Combination Type Of Particle Dampersmentioning

confidence: 99%

Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

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186

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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Section: The Combination Type Of Particle Dampersmentioning

confidence: 99%

Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

Self Cite

186

105

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“…Because TMDs have the advantages of small size and little interference to pedestrian bridges, they are widely used to control human-induced vibrations and solve the serviceability problem [8][9][10]. The vibration response of a pedestrian bridge is controlled by the inertia force given by the TMD, and the vibration energy of the TMD will be dissipated through its damping element [11][12][13]. TMD is a single degree of freedom proposed design method and the vibration control effect of the optimized TMD is verified through a case study.…”

Section: Introductionmentioning

confidence: 99%

Application of an Artificial Fish Swarm Algorithm in an Optimum Tuned Mass Damper Design for a Pedestrian Bridge

et al. 2018

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Tuned mass damper (TMD) has a wide application in the human-induced vibration control of pedestrian bridges and its parameters have great influence on the control effects, hence it should be well designed. A new optimization method for a TMD system is proposed in this paper, based on the artificial fish swarm algorithm (AFSA), and the primary structural damping is taken into consideration. The optimization goal is to minimize the maximum dynamic amplification factor of the primary structure under external harmonic excitations. As a result, the optimized TMD has a smaller maximum dynamic amplification factor and better robustness. The optimum TMD parameters for a damped primary structure with different damping ratios and different TMD mass ratios are summarized in a table for simple, practical design, and the fitting equation is also provided. The TMD configuration optimized by the proposed method was shown to be superior to that optimized by other classical optimization methods. Finally, the application of an optimized TMD based on AFSA for a pedestrian bridge is proposed as a case study. The results show that the TMD designed based on AFSA has a smaller maximum dynamic amplification factor than the TMD designed based on the classic Den Hartog method and the TMD designed based on the Ioi Toshihiro method, and the optimized TMD has a good effect in controlling human-induced vibrations at different frequencies.

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“…Tuned mass damper (TMD) is one of the most traditional vibration control devices; it consists of a mass, some springs and damping elements [1][2][3][4][5][6]. For its purpose, it can be divided into vertical TMD and pendulum TMD.…”

Section: Introductionmentioning

confidence: 99%

Study on Adaptive-Passive and Semi-Active Eddy Current Tuned Mass Damper with Variable Damping

et al. 2018

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Tuned mass damper (TMD) is a widely used vibration control device, consisting of a mass, some springs and damping elements. Viscous damper is mostly used as a damping element; however, it has many unsustainable problems, e.g., poor durability, sensitive to the change of temperature, difficult to adjust the damping, oil leakage etc. In this paper, a new sustainable adaptive-passive eddy current tuned mass damper (ECTMD) with variable damping, which is very easy to be further upgraded to a semi-active one, is proposed. Four important parameters, e.g., adsorption position of permanent magnets, thickness of the conductive plate, thickness of the extra steel plate and the air gap between permanent magnets and the conductive plate are investigated by a parametric study. Two new evaluation indexes are put forward to indicate the damping mechanism of the proposed device. The relationship between effective damping coefficient and air gap is fitted through a quadratic function. Then, the corresponding design method of the proposed adaptive-passive ECTMD is presented. At last, the previous adaptive-passive ECTMD is upgraded to a semi-active one, which can adjust its eddy current damping through adjusting its air gap in real-time, based on the linear-quadratic-Gaussian algorithm. The effectiveness of semi-active ECTMD is evaluated through harmonic excitations and human-induced excitations. The results show that the semi-active ECTMD with variable damping has a better vibration control effect than the optimized passive one.

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Experimental investigation on dynamic characterization and seismic control performance of a TLPD system

Cited by 46 publications

References 38 publications

Particle impact dampers: Past, present, and future

Particle impact dampers: Past, present, and future

Application of an Artificial Fish Swarm Algorithm in an Optimum Tuned Mass Damper Design for a Pedestrian Bridge

Study on Adaptive-Passive and Semi-Active Eddy Current Tuned Mass Damper with Variable Damping

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