Experimental study on adjustable tuned mass damper to reduce floor vibration due to machinery

Chang, Min-Li; Lin, Chi‐Chang; Ueng, Jin-Min; Hsieh, Kuen-Chang; Wang, Jer‐Fu

doi:10.1002/stc.330

Cited by 12 publications

(12 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Figure 4 that the experimental results match best with the analytic curve when n = 1.3 and the pounding stiffness of HEDR material layer can be obtained to 2.19 × 10 5 N/m 1.3 by substituting n = 1.3 into Equation (11). Furthermore, based on the classic impact theory and the conservation of energy, the coefficient of restitution e can be calculated by 49…”

Section: Figurementioning

confidence: 66%

“…When a free pounding experiment was performed by giving the pendulum mass an initial displacement x d0 = 50.0 mm, the experimental history of impact force can be obtained in Figure 3. The preimpact velocity is 0.157 m/s from Equation (13), and the maximum impact force f e is 116.8 N. Then, a certain value of n is assumed such as n = 1.5, and the pounding stiffness can be calculated from Equation (11). By substituting the obtained value of pounding stiffness into Equation (12), the relationships between the pounding duration and the preimpact velocity under different nonlinear coefficients n are plotted in Figure 4.…”

Section: Figurementioning

confidence: 99%

“…[5][6][7][8][9] Passive control methods were commonly adopted in engineering practices due to its low cost and design simplicity. Tuned mass damper (TMD) is a passive device attached to the main structure for damping enhancement, [10][11][12] and it has been demonstrated that it can control structural vibrations due to wind, earthquake, and human-induced loadings. [13][14][15][16] The foremost TMD device developed by Frahm 17 in 1909 does not include the inherent damping and only works in a narrow frequency range around the resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling, simulation, and validation of a pendulum-pounding tuned mass damper for vibration control

Wang

Hua

Chen

et al. 2019

Struct Control Health Monit

View full text Add to dashboard Cite

Summary This paper proposes a new passive control device, pendulum‐pounding tuned mass damper (PPTMD), to mitigate the response of lightly damped structures under various excitations. The proposed PPTMD consists of a tuned pendulum mass and a pounding boundary next to the equilibrium position of the pendulum mass. Moreover, a layer of viscoelastic materials called high energy‐dissipation rubber is attached on the pounding boundary to dissipate the vibration energy through impacts. A simplified impact force model was developed for modeling the pounding behavior of the high energy‐dissipation rubber pounding layer, and parameters in the simplified model were identified from free pounding experiments. The validation of the numerical method to simulate the dynamic behavior of the PPTMD was provided. The effectiveness of the PPTMD to control a single degree‐of‐freedom structure was numerically and experimentally studied under free vibration and forced vibration. The effects of the frequency tuning ratio, the coefficient of restitution, the excitation force amplitude, and the mass ratio were studied, respectively. Finally, the control performance of the PPTMD was compared with the classic tuned mass damper under free vibration, forced vibration, and several earthquake records. It is shown that the PPTMD can significantly increase the damping ratio of the controlled structure and effectively reduce the response of the controlled structure around the resonant frequency range. Furthermore, the PPTMD still achieves considerable control performance even if the frequency of the controlled structure varied in a wide range. Due to the different vibration control mechanism, the PPTMD outperforms the classic resonant frequency range in controlling the structural displacement response.

show abstract

Section: Figurementioning

confidence: 66%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling, simulation, and validation of a pendulum-pounding tuned mass damper for vibration control

Wang

Hua

Chen

et al. 2019

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…Emiliano et al [37] introduced the robust design of mass-uncertain rolling-pendulum TMDs for the seismic protection of buildings. Chang et al [38] presented the experimental study on adjustable TMD to reduce floor vibrations due to machinery. Berardengo et al [39] introduced the modelling and control of an adaptive TMD based on shape memory alloys and eddy currents.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

“…Matta et al developed mass‐uncertain rolling‐pendulum TMDs for the seismic protection of buildings. Chang et al proposed a new field‐based design procedure and an adjustable vertically moving TMD, which composed of variable mass blocks and changeable springs. Casado et al studied a control system for an adaptive tuned mass damper for self‐climbing formworks, which can be used in some critical construction phases of concrete piers.…”

Section: Introductionmentioning

confidence: 99%

Study on self-adjustable tuned mass damper with variable mass

Shi

Wang

Lü

2017

Struct Control Health Monit

View full text Add to dashboard Cite

Summary Tuned mass dampers (TMDs) represent a quite mature technology for controlling human‐induced vibrations of footbridges, when they are tuned to the primary structure's fundamental frequency. However, the TMD is very sensitive to even a small change in the tuning ratio. This paper proposes a novel TMD named self‐adjustable variable mass TMD (SAVM‐TMD), which is capable of varying its mass and retuning its frequency on the basis of the acceleration ratio between the primary system and the TMD. The accelerations are obtained from two acceleration sensors, and the frequency adjustment is achieved by using a microcontroller and actuating devices. The acceleration ratio limit value should be set in the microcontroller firstly, and when the adjustment begins, the microcontroller will retune the TMD to a reasonable frequency region, under a specific harmonic excitation. The SAVM‐TMD can be regarded as a passive control device capable of adjusting its frequency. The performance of SAVM‐TMD is studied via both experimental studies and numerical simulations under different pedestrian excitations. It is found that the SAVM‐TMD is effective in reducing the response and improving the equivalent damping ratio of the primary system when the structural frequency changes, with little power consumption. The results obtained from the experimental studies and the numerical simulations agree with each other very well. More pedestrian vibration situations are studied in the numerical simulations, and the results also show that the SAVM‐TMD has excellent performance in controlling human‐induced vibrations.

show abstract

Experimental study on adjustable tuned mass damper to reduce floor vibration due to machinery

Cited by 12 publications

References 7 publications

Modeling, simulation, and validation of a pendulum-pounding tuned mass damper for vibration control

Modeling, simulation, and validation of a pendulum-pounding tuned mass damper for vibration control

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

Study on self-adjustable tuned mass damper with variable mass

Contact Info

Product

Resources

About