Analysis and experiment of a novel compact magnetic spring with high linear negative stiffness

Ming-kai, WU; Wu, Jiulin; Che, Jixing; Gao, Ruiqi; Chen, Xuedong; Li, Xiaoqing; Zeng, Lizhan; Jiang, Wei

doi:10.1016/j.ymssp.2023.110387

Cited by 25 publications

(3 citation statements)

References 68 publications

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“…Zhang [56] proposed a magnetic negative stiffness isolator to enhance the low-frequency vibration-isolation capability of the system. Finally, Wu [57] proposed a compact magnetic spring with linear negative stiffness to improve the working range of the device in a limited space.…”

Section: Introductionmentioning

confidence: 99%

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Sun,

Peng,

et al. 2023

Buildings

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A passive double triangular damping (DTD) device with equivalent negative stiffness is proposed in this study. The DTD device consists of transmission systems and triangular damping systems. A mechanical model was developed to describe the force–displacement relationship of a triangular damping system, while the feasibility of both the system and model was evaluated using experimental tests. The theoretical analysis demonstrated that DTD was a form of damping with equivalent negative stiffness, and the equivalent expressions were generated. Finally, the prospect of application in the DTD-controlled isolation system was explored using numerical simulation. The results revealed that DTD was more effective than a lead–rubber bearing in reducing isolator displacement and rooftop acceleration when subjected to ground motions.

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Section: Introductionmentioning

confidence: 99%

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Sun,

Peng,

et al. 2023

Buildings

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“…Vibration is a common physical phenomenon in engineering and technology, affecting the operation of the equipment and the mechanical power system while reducing its lifespan [ 1 , 2 ]. The traditional passive vibration isolation system has been widely used in vibration isolation due to its simple structure and low cost [ 3 , 4 , 5 ]. However, traditional vibration isolation systems cannot be adjusted in real time based on changes in external excitation frequency.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristic Analysis of a Toothed Electromagnetic Spring Based on the Improved Bouc—Wen Model

et al. 2023

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Electromagnetic spring active isolators have attracted extensive attention in recent years. The standard Bouc–Wen model is widely used to describe hysteretic behavior but cannot accurately describe asymmetric behavior. The standard Bouc–Wen model is improved to better describe the dynamic characteristic of a toothed electromagnetic spring. The hysteresis model of toothed electromagnetic spring is established by adding mass, damping, and asymmetric correction terms with direction. Subsequently, the particle swarm optimization algorithm is used to identify the parameters of the established model, and the results are compared with those obtained from the experiment. The results show that the current has a significant impact on the dynamic curve. When the current increases from 0.5 A to 2.0 A, the electromagnetic force sharply increases from 49 N to 534 N. Under different excitations and currents, the residual points predicted by the model proposed in this work fall basically in the horizontal band region of −20–20 N (for an applied current of 1.0 A) and −40–80 N (for an application of 4.5 mm/s). Furthermore, the maximum relative error of the model is 12.75%. The R2 of the model is higher than 0.98 and the highest value is 0.9993, proving the accuracy of the established model.

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“…In order to overcome the limitations of traditional vibration control methods and achieve more accurate, efficient, and flexible vibration control, researchers have started to study new control methods. Active vibration control has, therefore, become a popular research topic [10][11][12]. Electromagnetic springs are characterized by a fast response [13][14][15][16], large displacement and output [17][18][19], and easily integrating with vibration energy harvesting [20,21]; they also have wide application prospects [22,23].…”

Section: Introductionmentioning

confidence: 99%

Parametric Analysis of the Toothed Electromagnetic Spring Based on the Finite Element Model

Zheng,

Zhang,

Lou

et al. 2023

Aerospace

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Active vibration control shows excellent performance in vibration isolation. In this work, the finite element model of a toothed electromagnetic spring (TES) is established using ANSYS Maxwell software. Subsequently, a static characteristic experiment of the TES is carried out, and the validity of the model is verified. Based on the established finite element model, the influence of key structural parameters on the static characteristics of the electromagnetic spring is analyzed. The results show that the parameters of the magnetic teeth have a significant impact on the performance of the electromagnetic spring. As the number of teeth increases, the electromagnetic force first increases and then decreases. With the increase in the tooth height or width, the maximum electromagnetic force gradually increases to the maximum value and then stabilizes. It should be noted that the tooth width simultaneously affects the maximum electromagnetic force, stiffness characteristics, and effective working range of the TES. This work provides a basis for further exploring the application of electromagnetic springs within the field of active vibration control.

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Analysis and experiment of a novel compact magnetic spring with high linear negative stiffness

Cited by 25 publications

References 68 publications

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Dynamic Characteristic Analysis of a Toothed Electromagnetic Spring Based on the Improved Bouc—Wen Model

Parametric Analysis of the Toothed Electromagnetic Spring Based on the Finite Element Model

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