Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Ohno, Ken; Suzuki, Hayato; Sawada, Tatsuo

doi:10.1016/j.jmmm.2010.11.052

Cited by 26 publications

(15 citation statements)

References 6 publications

(8 reference statements)

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“…To improve the performance of TLD, Abe et al [53] employed ferrofluid as the working fluid in 1998. Further studies were conducted by Sawada et al [54][55][56][57][58] from Japan. Figure 19 illustrates an active absorber, and it was actually called an active tuned liquid damper in which ferrofluid activated by electromagnets was used to improve its performance.…”

Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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Ferrofluids are a special category of smart nanomaterials which shows normal liquid behavior coupled with superparamagnetic properties. One of the earliest and most prospective applications of ferrofluids is in damping, which has prominent advantages compared with conventional damping devices: simplicity, flexibility and reliability. This paper presents the basic principles that play a major role in the design of ferrofluid damping devices. The characteristics of typical ferrofluid damping devices including dampers, vibration isolators, and dynamic vibration absorbers are compared and summarized, and then recent progress of vibration energy harvesters based on ferrofluid is briefly described. Additionally, we proposed a novel ferrofluid dynamic vibration absorber in this paper, and its damping efficiency was verified with experiments. In the end, the critical problems and research directions of the ferrofluid damping technology in the future are raised.

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Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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“…Later, Yang et al [16] wound electromagnetic induction coils around the piston-type magnetic fluid damper to achieve the purpose of active vibration control and carried out fluid--solid-thermal multiphysical field coupling analysis on the damper. Sawada et al [17][18][19][20][21] developed the analysis model and numerical simulation of the semiactive tuned magnetic fluid damper and carried out a series of experiments to verify the effectiveness of the damper. Such semiactive dampers are expected.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Analysis and Experimental Research on Damping Performance of a Novel Magnetic Fluid Damper

Yang

Wei

et al. 2021

Advances in Materials Science and Engineering

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Considering the low-frequency and large-amplitude vibration characteristics of the high-rise structure, a tuned magnetic fluid rolling-ball damper is proposed to suppress the vibration of the structure. By adjusting the external magnetic field to control the natural rolling frequency of the ball, the purpose of tuning vibration reduction is achieved. Firstly, the working principle of the damper is theoretically analysed, a three-dimensional (3D) magnetic-fluid-solid multiphysical field coupling mathematical model of the damper is established and the governing equations of multiphysical field coupling are derived. Secondly, the magnetic field distribution and operating characteristics of the damper are simulated and analysed. Finally, the effectiveness of the model is verified by experiments, and the damping performance of the damper with two kinds of magnetic fluid is tested and compared. The results show that the magnetic-fluid-solid multiphysical field coupling model can accurately simulate the working characteristics of the damper. The maximum damping force of the damper is about 12% of the elastic force of the structure, which can increase the damping ratio of the structure by about two times, effectively reduce the vibration response time, and suppress the vibration of the high-rise structure.

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“…Biomedical applications have also been developed to magnetically modify various types of organic or inorganic materials or microbial cells with magnetic fluids [7,8]. Due to the increased saturation magnetization of magnetic fluids exposed to a magnetic field, the application of magnetic fluids in vibration control and dampers especially have received a great deal of attention [9][10][11]. Magnetic fluids were filled in a U-tube to develop a tuned liquid column damper (TLCD) by Oyamada et al [12].…”

Section: Introductionmentioning

confidence: 99%

Damping Force Modeling and Suppression of Self-Excited Vibration due to Magnetic Fluids Applied in the Torque Motor of a Hydraulic Servovalve

Zhang

Peng

2017

Energies

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Abstract:As a key component of hydraulic control systems, hydraulic servovalves influence their performance significantly. Unpredictable self-excited noise inside hydraulic servovalves may cause instability and even failure. Being functional, with higher saturation magnetization and increased viscosity when exposed to a magnetic field, magnetic fluids (MFs) have been widely used in dampers, sealing, and biomedical treatment. In this paper, magnetic fluids are applied in the torque motor of a hydraulic servovalve to exert damping and resistance for vibration and noise suppression. Construction of the torque motor armature with magnetic fluids is introduced and the forces due to magnetic fluids on the torque motor armature are studied. Based on a bi-viscosity-constituted relationship, a mathematical model of the damping force from magnetic fluids is built when magnetic fluids are filled in the working gaps of the torque motor. Measurements of the properties of an Fe 3 O 4 composite magnetic fluid are carried out to calculate the parameters of this mathematical model and to investigate the influence of magnetic fluids on the vibration characteristics of the armature assembly. The simulated and tested harmonic responses of the armature with and without magnetic fluids show the good suppression effects of magnetic fluids on the self-excited noise inside the servovalve.

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Analysis of liquid sloshing of a tuned magnetic fluid damper for single and co-axial cylindrical containers

Cited by 26 publications

References 6 publications

Damping Applications of Ferrofluids: A Review

Damping Applications of Ferrofluids: A Review

Numerical Simulation Analysis and Experimental Research on Damping Performance of a Novel Magnetic Fluid Damper

Damping Force Modeling and Suppression of Self-Excited Vibration due to Magnetic Fluids Applied in the Torque Motor of a Hydraulic Servovalve

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