Design and dynamic characterization of a large-scale eddy current damper with enhanced performance for vibration control

Zhang, Hongyi; Chen, Z.Q.; Hua, Xugang; Huang, Zhiwen; Niu, Huawei

doi:10.1016/j.ymssp.2020.106879

Cited by 63 publications

(23 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Anwar and Stevenson (2006) introduced a nonlinear model using a double exponential function to model the characteristics between torque and velocity. Zhang et al (2020) proposed a nonlinear model by using a two-dimensional analytical method to evaluate the relationship between torque and rotating velocity, and the results indicate the nonlinear model is consistent with numerical simulation.…”

Section: Introductionmentioning

confidence: 56%

Theoretical investigations on the linear and nonlinear damping force for an eddy current damper combining with rack and gear

Jian-zhong

et al. 2021

Journal of Vibration and Control

View full text Add to dashboard Cite

To study the damping characteristics of a new type of eddy current damper with rack and gear recently proposed by the authors, the damping torque for the eddy current damper with rack and gear was theoretically investigated based on some fundamental assumptions, including evenly distributed magnetic field on a conductor plate and no magnetic leakage. A linear relationship between damping torque and velocity was obtained. Numerical simulations by using COMSOL Multiphysics were conducted to evaluate the accuracy of the linear theoretical formula. When angular velocity is less than 30 rad/s, it seems that the linear theoretical results agree well with the numerical results, and maximum relative error between them is about 6.58%. Then, by using COMSOL Multiphysics, a series of parametric studies on damping torque, including the effects of the air gap, the thickness of a back iron plate, the location and number of permanent magnets, and the thickness of a conductor plate, were carried out to further examine the linear theoretical formula. The results show the effects of the air gap and back iron plate on the relative error between linear theoretical and numerical results can be ignored, whereas the location and number of permanent magnets and the thickness of the conductor plate have significant influences on the relative error. Finally, a nonlinear theoretical formula was obtained by introducing three modified coefficients into the linear theoretical formula, and its accuracy was verified in some typical cases. It is proved that there is sufficient accuracy to adopt the nonlinear theoretical formula in preliminary design of the eddy current damper with rack and gear to determine the main structural parameters.

show abstract

Section: Introductionmentioning

confidence: 56%

Theoretical investigations on the linear and nonlinear damping force for an eddy current damper combining with rack and gear

Jian-zhong

et al. 2021

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 11, the supplemental dampers are installed between the first layer and the foundation. The structural parameters of the base isolated structure simplified by Zhang et al 33 These data were downloaded from the Peer Ground Motion Database. In order to evaluate the damping performance of the RGA-ECD more objectively, the conventional FVD widely used in civil engineering was also adopted in the numerical simulations for comparison.…”

Section: Examination For the Prototype Of The Rga-ecdmentioning

confidence: 99%

“…Wang et al 32 proposed a rotary electromagnetic inertial mass damper (REIMD) by using the ball screw mechanism and the flywheel to reduce the vibration of stay cables. Liang et al 22 and Zhang et al 33 studied the dynamic characteristics of a large‐scale ECD with the ball screw mechanism, and the results show that the large‐scale ECD has enhanced performance for vibration control.…”

Section: Introductionmentioning

confidence: 99%

A novel 500 kN axial eddy current damper using rack and gear mechanism: Design, testing, and evaluation

Mao

et al. 2022

Structural Contr & Hlth

View full text Add to dashboard Cite

Summary A novel axial eddy current damper by using rack and gear mechanism (RGA‐ECD) was proposed. A 500 kN RGA‐ECD prototype was manufactured and tested, and its nonlinear damping performance was systematically studied. First, the configuration of the RGA‐ECD was introduced in detail, and its axial force was theoretically derived. Second, an RGA‐ECD prototype with a target damping force of 500 kN at the velocity of 0.5 m/s was designed and manufactured, and a series of tests on the prototype were conducted. In the test, the maximum damping force of this prototype is 507 kN at the velocity of 0.509 m/s, which achieves the design goal. It appears that the tested results are in good agreement with the numerical results obtained from COMSOL Multiphysics when the loading velocity is less than 0.377 m/s. When the loading velocity is greater than 0.377 m/s, the maximum relative difference between the tested and numerical results is within 10.8%. The hysteresis curves of the prototype are relatively smooth, and the repeatability is also excellent, which indicates that the mechanical properties of the RGA‐ECD are considerably stable and reliable. Third, the effectiveness of the RGA‐ECD in mitigating seismic responses of base isolated structures was investigated by comparing it with fluid viscous damper. The results show that the RGA‐ECD can be adopted as an alternative to the fluid viscous damper for seismic vibration control, and there is a force‐limiting characteristic for the RGA‐ECD, which can prevent the damage of the damper and controlled structure.

show abstract

“…The structural control technology has been proved to be able to reduce the excessive vibrations of flexible structures caused by dynamic excitations. The control strategy can be active, semi‐active, or passive, and the advantages of the passive control are no external energy input required, its simpler structural form, and lower cost 1,2 . With the development of the inerter, the performance of passive energy dissipation devices can be further enhanced.…”

Section: Introductionmentioning

confidence: 99%

Optimal design and performance evaluation of a novel hysteretic friction tuned inerter damper for vibration control systems

Hua

Tai

Huang

et al. 2021

Struct Control Health Monit

Self Cite

View full text Add to dashboard Cite

Summary This paper studies the use of a new nonlinear damper, the hysteretic friction tuned inerter damper (HFTID), for seismic control of engineering structures. The HFTID consists of a tuned inerter damper (TID) in parallel with a hysteresis spring friction element. The analytical expressions for the force and displacement transmissibility of a SDOF system with HFTID are derived via the method of harmonic balance, and the solutions are validated through numerical simulation based on the OpenSees. Parametric study is carried out to investigate the influence of the hysteresis spring friction element on the transmissibility. The optimal tuning parameters of HFTID are obtained and optimality corresponds to minimization of the maximum force or displacement transmissibility. By applying a sequence of curve fitting scheme, design formula for optimal tuning parameters of the HFTID are formulated, which are expressed as functions of structural damping ratio, inertance–mass ratio, and stiffness ratio. The vibration reduction effect and robustness of vibration control systems with HFTID and TID are compared. The results demonstrate that the HFTID can further reduce the transmissibility of vibration control system compared with TID. Moreover, HFTID is more robust than the TID in the case of detuning. Finally, a multi‐story building is taken as an example to demonstrate the effectiveness and practicability of the HFTID in reducing seismic response.

show abstract

Design and dynamic characterization of a large-scale eddy current damper with enhanced performance for vibration control

Cited by 63 publications

References 38 publications

Theoretical investigations on the linear and nonlinear damping force for an eddy current damper combining with rack and gear

Theoretical investigations on the linear and nonlinear damping force for an eddy current damper combining with rack and gear

A novel 500 kN axial eddy current damper using rack and gear mechanism: Design, testing, and evaluation

Optimal design and performance evaluation of a novel hysteretic friction tuned inerter damper for vibration control systems

Contact Info

Product

Resources

About